wideband reading at idle

Av - 14 juni, 2021

Hey guys im trying to get an idle reading with my aem wideband I get all the readings during acceleration But nothing at idle, obviously leaks can cause a lean situation but mine is no reading at all and also dont see or hear leaks. The wideband sensor requires a wideband driver to work. The reason I am concentrating on the wideband reading is because it is highly unusual to see absolutely no swing in AFR at Idle. based on my limited research on honda-tech, freshalloy, and zilvia, it does seem to be one of the more reputable a/f meters. Low 10s is too rich, high 12s is too lean. The wideband is installed after the cat however.. im not sure if that would make a difference or not. What is a good wideband reading? because the tuner can read the actual fuel air ratio averaged out per bank, make adjustments and go from there hence before this era people were flying blind, reading spark plugs, reading piston domes, etc, and some folks still use some of these techniques with great success. No exhaust leaks and my Air fuel ratio at idle is at 16.0 after revving up to about 1200 it kicks it down to about 14.7. At idle afr is 24+!, while cruising it's all over the place but usually around 18-20 afr. Looking at the Air/Fuel , RPM and Vacuum , you will find that barely moving your carb’s idle mixture screws – maybe 1/16 th of a turn – can change the Air/Fuel Ratio over half of a point without any change in your perceived idle speed. It barely fluctuates. Hello everyone! I have set the fuel pressure to give a reading of about 13 under hard acceleration up hill, (temporary till it goes on a RR). Only ran the car for a minute. Is having the sensor in the tailpipe really throwing me off that bad? Wideband sensor reading rich Hey does anyone have any tips for me regarding a wideband accuracy? Commanded afr is 14.68 So verify that afr on the gauge matches the scan afr in HPT. 185. Deceleration will normally take it off the charts into lean, if you have an AEM it will display '---'. Ive got a buschur downpipe which does not use a gasket at the o2 housing. At cruise the readings on the scanner and wideband stayed near the 14.7 reading. I do think the idle is rich but I have set it up using a vacuum gauge to get the highest reading and re checked a couple of times but can still smell unburnt fuel at idle . I am tuning my 1994 fd rx7 and it reads quite rich at idle and very inconsistent ie. I have my wideband hooked up to an innovate exhaust clamp in my tailpipe. I want to use it to get my idle circuit dialed in. Goes up to around 12 something I believe if I rev and hold around 2k RPMs. I have a real basic question. – Feed the Wideband … It was pretty much cold. Sure the trims catch it during regular driving, but you may be way off at WOT. What would cause it to do that, unless the 6.0 chip is programmed with the wrong software. The wideband sensor is about half way down the downpipe. At idle and cruising you should read 14.7AFR (-/+ 0.4). pulling a tiny bit of fuel, sorry for now showing a plot of this but that is what it is). Installed an AEM Wideband over the weekend and thought the readings would be fairly steady, but it seems to bounce around at idle between 13.5 - 15.9. Going downhill on the highway (or taking the leg off the throttle) voltage jumps to 1200 millivolts - either engine is running VERY rich or O2 sensor not functioning properly. Every engine is different. But the gauge reads --- when at WOT? Then I was able to get a nice idle, and a good vacuum reading … Your wideband better read ~12.5afr. It's no secret that an exhaust leak negatively impacts wideband accuracy, or that it will skew readings lean, but how big of a hole would cause a significant reading change remained untested. Once at Westech, our 350ci small-block Chevy was bolted to the dyno and the MTX-LPLUS wideband AFR gauge was wired up and mounted on the engine. So, either you are failing to go into closed-loop or your wideband settings (internal or in Calc.Pid) may be off. It started around 12.x and I was able to see my idle screw adjustments and took it up to the 14.x range. Is there a way to check afrs accurately with the access port? Thought ECU can read ARFs upto 14.7 +/-0.3, hence why you need the wideband to accurately read AFRs to tune in the first place. it bounces around anywhere from 10.4-13.1 constantly all while staying on the same couple cells. If the sensor is working normally, you should see a reading of around 0.66 volts (if the signal is converted to OBD II generic), or 3.1 to 3.5 volts if you are reading the voltage signal generated by the PCM for the A/F sensor(s). Originally Posted by slowhawk. I'm not totally sure how to use the info to best tune the carb. Load - Is the measurement of how hard an engine is working. I checked the readings on the oxygen sensor it read 0.88v at idle, according to the parameter description reading … Now a day or two after being back and I loaded up my 94 octane tune I noticed my idle AFR started to climb to the point I am now idling around 15.7-17 afr. I expected it to be a little off but this seems rather excessive. Appearently the AEM wideband does not work with Hondata. I just installed a wideband O2 sensor in my carbureted (750 DP) small block, E85 powered Chevelle. The initial AFR readings were unaffected, but that rapidly changed as the gasket burned and the gap between the collector's flanges widened. Is this normal? This is just one area where Innovate’s wideband really shines – sensitivity. I have the wideband's negative and HP tuner Prolink hooked to the negative of the battery. It's a cheap downpipe. I'm currently using the narrowband output from the wideband and connected to the factory ECU deleting the existing factory narrowband sensor. Right: Wideband displaying a stoich reading in its native lambda scale. Misfires cause a sharp lean reading. -At idle or a steady cruise, it is normal for your gauge to display an AFR value of 14.0:1-15.5:1 or 0.95-1.05 in lambda. September 15, 2016 at 5:54:24 AM at 5:54:24 AM It is critical that you understand that the wideband reads OXYGEN, not fuel! What is the gauge reading at 3rd gear WOT pulls. Cruising I see average 14.7 so im not concerned about that. The next step is to start over by re-booting the system, establish a decent running AFR where the engine runs cleanly at idle (regardless of what the O 2 sensor reads) and then disable the learning function at idle so further corrections do not continually add fuel to the system. Can someone tell me a good method to use to set the 4 corner idle on my 750 Holley DP? With that being said, I most likely have a leak right there my question is will that cause my wideband to read lean?? Here is a generalized guide to give you a rough idea of where your target AFR or lambda value should be: -At idle or a steady cruise, it is normal for your gauge to display an AFR value of 14.0:1-15.5:1 or 0.95-1.05 in lambda. -A naturally aspirated motor under high load will target an AFR value of 12.5:1-13.3:1 or 0.85-0.91 in lambda. The REM becomes a middle man to translate the wideband reading into a signal for the Renix ECU. ... More importantly you need to visually confirm your wideband is reading correctly. I'd say the wideband is reading wrong at idle.That Cam is fairly small to tune in OLSD and should idle easilly at 14.7-1. They gulp in extra air..it is unusual to see your scan. If it has a rough idle due to the cam, you will not get a stable reading because of variations of burn efficiency from firing to firing. Found it very hard to lean things out without stumbling until I switched from full manifold vacuum to ported on the advance. WOT you are trying to tune for around 11.5. I have the AEM wideband mounted in the bung directly after the turbo and I read ~14.7 at idle, mid 11's under boost, only time I even see above stoic is if I'm off throttle and coasting. My wideband reads something higher, in the 14 - 15s'. After coolant has reached 87/88°C, at idle (~700 rpm), O2 sensor voltage is 700-800 millivolts. So what would you be comparing it too? what EMS are you using? – This is usually included in a wideband kit inside an all-in-one gauge or standalone pack. Again the car still runs well and at WOT the fueling is 11.5 when my commanded is 11.46, so its basically perfect at WOT The only time the A/F should read out the lean end is when you let off of throttle, like when coming to the stop. Im chasing a rich condition based on the reading from my afr gauge and poor fuel consumption afr is 13.1 at idle, I ran a check using vida, no codes at all. R33 Rb25Det Running Rich On Idle. right now I'm seeing 15-15.5 @ idle which scares me.. If there is anything else on my truck that would skew the AFR readings I wouldn't know what could causing it. I'm going to look more Ito vacuum leaks this weekend. If I give a rev or start driving even under load, the voltage starts moving … At idle it starts around 15 and within about 20 seconds it gradually drops to about 11.8. So recently I've connected up an wideband O2 with narrowband simulation (Innovate MTX-L). A wideband O2 sensor is much more sophisticated and can supply the exact AFR measurement across a wide range of possible AFR values. -At idle or a steady cruise, it is normal for your gauge to display an AFR value of 14.0:1-15.5:1 or 0.95-1.05 in lambda. Something has to be wrong. -A naturally aspirated motor under high load will target an AFR value of 12.5:1-13.3:1 or 0.85-0.91 in lambda. what are the ideal readings i've been street tunning my car and at idle its at 14.7 and through the rpms its consistant 12.5-12.9 It might be that the wideband is not setup correctly in the scan side. Idle/Cruise - 14.7 - 15.0** Medium load - 14.0 - 13.5; WOT (NA) - 12.8 - 13.2; WOT (FI) - 11.5 - 12.0; NismoTronic incorporates a few different ways that you can aquire a wideband AFR reading … I am certain I have it hooked up properly, and at idle/no load conditions RomEditor & HondaLogger both read 3.83v. You dont want to change mafs that read diffeeantly as it will throw off WOT fueling. I'm wondering theres a leak between the turbo and downpipe. At idle the wideband gauge reads 11. Once in a while idling the AFR's will bounce up to 15-16:1, and I can feel the change in how the car's running. Save Share. If u dont have a wideband and you switched the MAF and now your having WOT issues - dont go WOT til u get a wideband in it. What is odd is that the front O2 sensor is reading very close to the final fueling base, short term fuel corrections read near zero and long term fuel corrections read around -2.0% (i.e. An engine will run pretty easily, even in poor tune. Installed my LM1 wideband sensor and started it up. -At idle or a steady cruise, it is normal for your gauge to display an AFR value of 14.0:1-15.5:1 or 0.95-1.05 in lambda. Reading a wideband gauge is important for power hungry enthusiasts and not just their tuner. Where do you guys feel it should be sitting around idle? Cams normally give you a false lean at Idle. My problem is that car is behaving as though it not idling. What should my AFR gauge read? So is the gauge reading and the scan reading the same at idle? Normal highway cruising, no incline, steady 75 mph it is 450-500 millivolts. My mechanic says that at idle, the actual idling is more important the a/f ratio reading. 1. best wideband reading during idle?\\ 2. wideband reading preboost? I've tuned idle AFRs on various engines that were perfect at 15.5:1 and others that would pitch a fit any leaner than 13.2. i would bet your right about the leak causing the errant readings and depending on the EMS and settings, you might be causing a rich condition at idle … My understanding is at idle you want it about 15.1, and cruising @ 14.7. most liklely more accurate than the autometer a/f ratio guages. The owner commands a target idle AFR of 13.5:1. This is one point that the EFI system will use to calculate the amount of fuel to deliver to the engine. Engine displacement, idle speed, and manifold vacuum are also integrated into the equation used to produce an idle fuel number. I also completed the sensor test with a PASS using a rag and gas i got 10 rich with it out of the car. Downloaded the tune today and enabled closed loop. The AEM uego guage came with it's own 02 sensor. 3. wideband reading during boost\\load { 18psi all day everyday }? -A naturally aspirated motor under high load will target an AFR value of 12.5:1-13.3:1 or 0.85-0.91 in lambda. So your wideband on the scan is showing a little bit richer than your commanded 11.5. Hopefully tomorrow I can get a WOT reading. • Next, rev the engine to 4,000 rpm and release the throttle so the engine returns quickly to idle. The last very common problem is an ignition problem (ignition miss), which will also show on the wideband as “lean”, as all that O2 goes into the exhaust system. I do understand that this is just another tool to be used along with a vacuum gauge and timing light and not the end all. Right: Wideband displaying a stoich reading in its native lambda scale. I installed an Autometer Wideband AFR gauge yesterday. What is the condition/age of the wideband, analog or digital? A/F's matter everywhere...just they are more important under boost though. Under 12 at WOT is fine...during cruising you should be close to 14.7, I never see anything over 15-15.1ish. I got the recommended Bosch replacement it read exactly the same as the original aem sensor. The readings from your wideband give you accurate and valuable insight into how your motor is running at any given time, and once you understand how a wideband gauge works it can also be used as a diagnostic aid in identifying mechanical problems and preventing engine damage. Wideband vs Narrowband sensors - A narrowband O2 sensor is only calibrated to know whether the current AFR is rich, lean, or stoich. During cold idle the NBO2 stays at around .450 or so, but as soon as the engine warms up it starts following the cross counts. Hopefully it's pretty obvious that anywhere the rpm drops to idle the WB sensor starts to read up into the 17-19 range. Just did a car yesterday with a 236/238 Cam and it idles at 850rpm with 14.5-1 A/F.Was pretty quick/easy to do. The same can be said of AEM’s wideband controller as the “snapshot” it takes of the air to fuel ratio is at the highest resolution available, giving a clear picture of the air to fuel ratio of the engine, not just at idle but when under load or during hard acceleration, part-throttle or full-throttle. I havent driven her yet, because Im worried about the lean mixture. Moonlighter Between Dimensions Trophy Guide, Autometer Gauges For Sale, Andy Murray Baby Gender, Digital Water Temp Gauge And Sender, Conduct Ceremony - Crossword Clue, Frittata With Mashed Potato Crust, Cannondale Topstone Sora Bike - 2020, Ucsd Graduation Banner, Infinitive In Spanish Examples, Meade County, Ks Homes For Sale,

Hey guys im trying to get an idle reading with my aem wideband I get all the readings during acceleration But nothing at idle, obviously leaks can cause a lean situation but mine is no reading at all and also dont see or hear leaks. The wideband sensor requires a wideband driver to work. The reason I am concentrating on the wideband reading is because it is highly unusual to see absolutely no swing in AFR at Idle. based on my limited research on honda-tech, freshalloy, and zilvia, it does seem to be one of the more reputable a/f meters. Low 10s is too rich, high 12s is too lean. The wideband is installed after the cat however.. im not sure if that would make a difference or not. What is a good wideband reading? because the tuner can read the actual fuel air ratio averaged out per bank, make adjustments and go from there hence before this era people were flying blind, reading spark plugs, reading piston domes, etc, and some folks still use some of these techniques with great success. No exhaust leaks and my Air fuel ratio at idle is at 16.0 after revving up to about 1200 it kicks it down to about 14.7. At idle afr is 24+!, while cruising it's all over the place but usually around 18-20 afr. Looking at the Air/Fuel , RPM and Vacuum , you will find that barely moving your carb’s idle mixture screws – maybe 1/16 th of a turn – can change the Air/Fuel Ratio over half of a point without any change in your perceived idle speed. It barely fluctuates. Hello everyone! I have set the fuel pressure to give a reading of about 13 under hard acceleration up hill, (temporary till it goes on a RR). Only ran the car for a minute. Is having the sensor in the tailpipe really throwing me off that bad? Wideband sensor reading rich Hey does anyone have any tips for me regarding a wideband accuracy? Commanded afr is 14.68 So verify that afr on the gauge matches the scan afr in HPT. 185. Deceleration will normally take it off the charts into lean, if you have an AEM it will display '---'. Ive got a buschur downpipe which does not use a gasket at the o2 housing. At cruise the readings on the scanner and wideband stayed near the 14.7 reading. I do think the idle is rich but I have set it up using a vacuum gauge to get the highest reading and re checked a couple of times but can still smell unburnt fuel at idle . I am tuning my 1994 fd rx7 and it reads quite rich at idle and very inconsistent ie. I have my wideband hooked up to an innovate exhaust clamp in my tailpipe. I want to use it to get my idle circuit dialed in. Goes up to around 12 something I believe if I rev and hold around 2k RPMs. I have a real basic question. – Feed the Wideband … It was pretty much cold. Sure the trims catch it during regular driving, but you may be way off at WOT. What would cause it to do that, unless the 6.0 chip is programmed with the wrong software. The wideband sensor is about half way down the downpipe. At idle and cruising you should read 14.7AFR (-/+ 0.4). pulling a tiny bit of fuel, sorry for now showing a plot of this but that is what it is). Installed an AEM Wideband over the weekend and thought the readings would be fairly steady, but it seems to bounce around at idle between 13.5 - 15.9. Going downhill on the highway (or taking the leg off the throttle) voltage jumps to 1200 millivolts - either engine is running VERY rich or O2 sensor not functioning properly. Every engine is different. But the gauge reads --- when at WOT? Then I was able to get a nice idle, and a good vacuum reading … Your wideband better read ~12.5afr. It's no secret that an exhaust leak negatively impacts wideband accuracy, or that it will skew readings lean, but how big of a hole would cause a significant reading change remained untested. Once at Westech, our 350ci small-block Chevy was bolted to the dyno and the MTX-LPLUS wideband AFR gauge was wired up and mounted on the engine. So, either you are failing to go into closed-loop or your wideband settings (internal or in Calc.Pid) may be off. It started around 12.x and I was able to see my idle screw adjustments and took it up to the 14.x range. Is there a way to check afrs accurately with the access port? Thought ECU can read ARFs upto 14.7 +/-0.3, hence why you need the wideband to accurately read AFRs to tune in the first place. it bounces around anywhere from 10.4-13.1 constantly all while staying on the same couple cells. If the sensor is working normally, you should see a reading of around 0.66 volts (if the signal is converted to OBD II generic), or 3.1 to 3.5 volts if you are reading the voltage signal generated by the PCM for the A/F sensor(s). Originally Posted by slowhawk. I'm not totally sure how to use the info to best tune the carb. Load - Is the measurement of how hard an engine is working. I checked the readings on the oxygen sensor it read 0.88v at idle, according to the parameter description reading … Now a day or two after being back and I loaded up my 94 octane tune I noticed my idle AFR started to climb to the point I am now idling around 15.7-17 afr. I expected it to be a little off but this seems rather excessive. Appearently the AEM wideband does not work with Hondata. I just installed a wideband O2 sensor in my carbureted (750 DP) small block, E85 powered Chevelle. The initial AFR readings were unaffected, but that rapidly changed as the gasket burned and the gap between the collector's flanges widened. Is this normal? This is just one area where Innovate’s wideband really shines – sensitivity. I have the wideband's negative and HP tuner Prolink hooked to the negative of the battery. It's a cheap downpipe. I'm currently using the narrowband output from the wideband and connected to the factory ECU deleting the existing factory narrowband sensor. Right: Wideband displaying a stoich reading in its native lambda scale. Misfires cause a sharp lean reading. -At idle or a steady cruise, it is normal for your gauge to display an AFR value of 14.0:1-15.5:1 or 0.95-1.05 in lambda. September 15, 2016 at 5:54:24 AM at 5:54:24 AM It is critical that you understand that the wideband reads OXYGEN, not fuel! What is the gauge reading at 3rd gear WOT pulls. Cruising I see average 14.7 so im not concerned about that. The next step is to start over by re-booting the system, establish a decent running AFR where the engine runs cleanly at idle (regardless of what the O 2 sensor reads) and then disable the learning function at idle so further corrections do not continually add fuel to the system. Can someone tell me a good method to use to set the 4 corner idle on my 750 Holley DP? With that being said, I most likely have a leak right there my question is will that cause my wideband to read lean?? Here is a generalized guide to give you a rough idea of where your target AFR or lambda value should be: -At idle or a steady cruise, it is normal for your gauge to display an AFR value of 14.0:1-15.5:1 or 0.95-1.05 in lambda. -A naturally aspirated motor under high load will target an AFR value of 12.5:1-13.3:1 or 0.85-0.91 in lambda. The REM becomes a middle man to translate the wideband reading into a signal for the Renix ECU. ... More importantly you need to visually confirm your wideband is reading correctly. I'd say the wideband is reading wrong at idle.That Cam is fairly small to tune in OLSD and should idle easilly at 14.7-1. They gulp in extra air..it is unusual to see your scan. If it has a rough idle due to the cam, you will not get a stable reading because of variations of burn efficiency from firing to firing. Found it very hard to lean things out without stumbling until I switched from full manifold vacuum to ported on the advance. WOT you are trying to tune for around 11.5. I have the AEM wideband mounted in the bung directly after the turbo and I read ~14.7 at idle, mid 11's under boost, only time I even see above stoic is if I'm off throttle and coasting. My wideband reads something higher, in the 14 - 15s'. After coolant has reached 87/88°C, at idle (~700 rpm), O2 sensor voltage is 700-800 millivolts. So what would you be comparing it too? what EMS are you using? – This is usually included in a wideband kit inside an all-in-one gauge or standalone pack. Again the car still runs well and at WOT the fueling is 11.5 when my commanded is 11.46, so its basically perfect at WOT The only time the A/F should read out the lean end is when you let off of throttle, like when coming to the stop. Im chasing a rich condition based on the reading from my afr gauge and poor fuel consumption afr is 13.1 at idle, I ran a check using vida, no codes at all. R33 Rb25Det Running Rich On Idle. right now I'm seeing 15-15.5 @ idle which scares me.. If there is anything else on my truck that would skew the AFR readings I wouldn't know what could causing it. I'm going to look more Ito vacuum leaks this weekend. If I give a rev or start driving even under load, the voltage starts moving … At idle it starts around 15 and within about 20 seconds it gradually drops to about 11.8. So recently I've connected up an wideband O2 with narrowband simulation (Innovate MTX-L). A wideband O2 sensor is much more sophisticated and can supply the exact AFR measurement across a wide range of possible AFR values. -At idle or a steady cruise, it is normal for your gauge to display an AFR value of 14.0:1-15.5:1 or 0.95-1.05 in lambda. Something has to be wrong. -A naturally aspirated motor under high load will target an AFR value of 12.5:1-13.3:1 or 0.85-0.91 in lambda. what are the ideal readings i've been street tunning my car and at idle its at 14.7 and through the rpms its consistant 12.5-12.9 It might be that the wideband is not setup correctly in the scan side. Idle/Cruise - 14.7 - 15.0** Medium load - 14.0 - 13.5; WOT (NA) - 12.8 - 13.2; WOT (FI) - 11.5 - 12.0; NismoTronic incorporates a few different ways that you can aquire a wideband AFR reading … I am certain I have it hooked up properly, and at idle/no load conditions RomEditor & HondaLogger both read 3.83v. You dont want to change mafs that read diffeeantly as it will throw off WOT fueling. I'm wondering theres a leak between the turbo and downpipe. At idle the wideband gauge reads 11. Once in a while idling the AFR's will bounce up to 15-16:1, and I can feel the change in how the car's running. Save Share. If u dont have a wideband and you switched the MAF and now your having WOT issues - dont go WOT til u get a wideband in it. What is odd is that the front O2 sensor is reading very close to the final fueling base, short term fuel corrections read near zero and long term fuel corrections read around -2.0% (i.e. An engine will run pretty easily, even in poor tune. Installed my LM1 wideband sensor and started it up. -At idle or a steady cruise, it is normal for your gauge to display an AFR value of 14.0:1-15.5:1 or 0.95-1.05 in lambda. Reading a wideband gauge is important for power hungry enthusiasts and not just their tuner. Where do you guys feel it should be sitting around idle? Cams normally give you a false lean at Idle. My problem is that car is behaving as though it not idling. What should my AFR gauge read? So is the gauge reading and the scan reading the same at idle? Normal highway cruising, no incline, steady 75 mph it is 450-500 millivolts. My mechanic says that at idle, the actual idling is more important the a/f ratio reading. 1. best wideband reading during idle?\\ 2. wideband reading preboost? I've tuned idle AFRs on various engines that were perfect at 15.5:1 and others that would pitch a fit any leaner than 13.2. i would bet your right about the leak causing the errant readings and depending on the EMS and settings, you might be causing a rich condition at idle … My understanding is at idle you want it about 15.1, and cruising @ 14.7. most liklely more accurate than the autometer a/f ratio guages. The owner commands a target idle AFR of 13.5:1. This is one point that the EFI system will use to calculate the amount of fuel to deliver to the engine. Engine displacement, idle speed, and manifold vacuum are also integrated into the equation used to produce an idle fuel number. I also completed the sensor test with a PASS using a rag and gas i got 10 rich with it out of the car. Downloaded the tune today and enabled closed loop. The AEM uego guage came with it's own 02 sensor. 3. wideband reading during boost\\load { 18psi all day everyday }? -A naturally aspirated motor under high load will target an AFR value of 12.5:1-13.3:1 or 0.85-0.91 in lambda. So your wideband on the scan is showing a little bit richer than your commanded 11.5. Hopefully tomorrow I can get a WOT reading. • Next, rev the engine to 4,000 rpm and release the throttle so the engine returns quickly to idle. The last very common problem is an ignition problem (ignition miss), which will also show on the wideband as “lean”, as all that O2 goes into the exhaust system. I do understand that this is just another tool to be used along with a vacuum gauge and timing light and not the end all. Right: Wideband displaying a stoich reading in its native lambda scale. I installed an Autometer Wideband AFR gauge yesterday. What is the condition/age of the wideband, analog or digital? A/F's matter everywhere...just they are more important under boost though. Under 12 at WOT is fine...during cruising you should be close to 14.7, I never see anything over 15-15.1ish. I got the recommended Bosch replacement it read exactly the same as the original aem sensor. The readings from your wideband give you accurate and valuable insight into how your motor is running at any given time, and once you understand how a wideband gauge works it can also be used as a diagnostic aid in identifying mechanical problems and preventing engine damage. Wideband vs Narrowband sensors - A narrowband O2 sensor is only calibrated to know whether the current AFR is rich, lean, or stoich. During cold idle the NBO2 stays at around .450 or so, but as soon as the engine warms up it starts following the cross counts. Hopefully it's pretty obvious that anywhere the rpm drops to idle the WB sensor starts to read up into the 17-19 range. Just did a car yesterday with a 236/238 Cam and it idles at 850rpm with 14.5-1 A/F.Was pretty quick/easy to do. The same can be said of AEM’s wideband controller as the “snapshot” it takes of the air to fuel ratio is at the highest resolution available, giving a clear picture of the air to fuel ratio of the engine, not just at idle but when under load or during hard acceleration, part-throttle or full-throttle. I havent driven her yet, because Im worried about the lean mixture.

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