A/F Gauge Problem......
Alright I installed my autometer a/f gauge last night and went for a spin. I was wondering if the following patters are right. The gauge when starting the car reads LEAN and then works its way slowly up to semi-rich at idle (heating up the sensor I am assuming). When Driving at cruise control, the gauge light bounces between the top part of stoich and the bottom part of lean (crossing into rich somtimes). At WOT it is RICH which is a good thing But when I let off the gas the light disappears into the lean section and comes back on when I give it more throttle (straight to the rich section). I searched, that's the thread that I was looking for, but mine is totally the opposite. Mine is pegged at Rich when idle and bounces around Stoich when driving, occasionally tapping the top of Lean but not further. This is backwards, I have no fuel mods and everything runs fine...any idea why it's reporting wrong? Was thinking possibly it could be a grounding issue and I'll ground it when I go to rewire it all, but it's tapped into the ECU 02, as many people did (from reading posts thru search) and they seemed to work fine. If no one has any ideas, I'll end up wiring it to the actual 02 sensor. Just double checking, the 02 sensor is on our downpipe? :confused: |
I read rich at idle also and constant speed is around stoich. only time it goes lean is on deceleration. Yes o2 sensor is on the DP.
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Alright, thanks for confirming the 02 location.....
That thread I read, everyone said it sits in Lean at idle, and Rich at WOT...so I think something isn't right :) I'll re-wire it unless, someone else has any suggestions. |
I read rich at idle if the car is warmed up, any other time it bounces back and forth from lean to rich is just crusing, under boost it is full Rich.....woops I always say it backwards I'm kinda dslec,,,, whatever
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Full lean is bad at full boost I would have that checked!
Originally posted by BlackRx7 I read rich at idle if the car is warmed up, any other time it bounces back and forth from lean to rich is just crusing, under boost it is full lean.... |
Your gauge is reading fine.
AT idle is reads rich and when u get on it(wot) it should go lean because u r using up so much fuel. Going lean is not a good thing but its fine as long as it doesnt go to lean. Pretty much the harder u step on the gas the leaner it will go. Running rich all the time is wasting gas. i would like to know when u should be worried when watching your gauge though. How far lean before u should let off. |
Re: A/F Gauge Problem......
Originally posted by SpYdEr I searched, that's the thread that I was looking for, but mine is totally the opposite. This is what you should see: Warm up: No lights or maybe some flickering. The sensor takes about 5 mins to warm up during which time the gauge is useless. Warm idle: Depends on the car, some are rich, some lean. As long as it’s not excessive, you’re OK. Light throttle cruise: Rapidly flickering back and forth over stoich. The ECU goes into closed-loop and tries to maintain stoich to maximise fuel economy. Full thottle: Full rich! If it starts to head back towards the middle, get off the gas immediately! Closed throttle: No lights. The ECU shuts off the injectors, so you’ll get no reading. If your readings are different, you have a problem. If no one has any ideas, I'll end up wiring it to the actual 02 sensor. |
really?? it should read full rich when on wot?? depending on boost though right??It wont be as bad with no mods apposed to full exhuast intake etc..??what about when its in the middle?? is it still not safe to boost high??
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https://www.rx7club.com/forum/showth...oto=nextnewest
Mine sits at Rich even when the car is warmed up...as some people stated it changes once the car has heated up some. |
Re: Re: A/F Gauge Problem......
Originally posted by NZConvertible Warm up: No lights or maybe some flickering. The sensor takes about 5 mins to warm up during which time the gauge is useless. Originally posted by NZConvertible Warm idle: Depends on the car, some are rich, some lean. As long as it’s not excessive, you’re OK. Originally posted by NZConvertible Light throttle cruise: Rapigly flickering back and forth over stoich. The ECU goes into closed-loop and tries to maintain stoich. Originally posted by NZConvertible Full thottle: Full rich! If it starts to head back towards the middle, get off the gas immediately! Originally posted by NZConvertible Closed throttle: No lights. The ECU shuts off the injectors, so you’ll get no reading. Originally posted by NZConvertible If your readings are different, you have a problem. |
Originally posted by CanadianRX7 really?? it should read full rich when on wot?? depending on boost though right??It wont be as bad with no mods apposed to full exhuast intake etc..?? On a stock or mildly modded car, some power can be gained by leaning out the conservative factory mixtures slightly (with a S-AFC for example), but this should only be done on a dyno with a wide-band A/F meter. what about when its in the middle?? is it still not safe to boost high?? |
with a working air pump/ ACV it should read full lean at idle becuase the airpump is pumbing air in before the 02 sensor so It gets a false reading. if you have removed the air pump, or your ACV is not working right it'll read rich at idle.
yes it should read almost full rich at wot, or even past 1/2 throttle or so. mine sits one light from the rich. which would be .8-.9 volts (10 led gauge) it should be around .85 or so at WOT. and now with no airpump it sits 1 or 2 lights from right at idle (.7-.9v) with the air pump on it was the first lean light. 0-.1v at idle. |
I correct myslef above I meant full rich
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sounds much better and safer
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I have not removed the air pump :(
Grr this is gonna bug me....... |
O i see. I dont have a a/f gauge yet but i will get one soon. I plan on taking off my air pump soon also but i have a cat on my exhaust so that makes it even :) the emmisions wont be too bad.
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yea, well my guage don't read shit at idle. once the car is warm i dont get a damn thing at idle? wtf.....
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From what I hear it warms up, then reads.....not always but sometimes *shrug*
Im still pulling out my hair trying to figgure out why mine isn't reading right. |
new poll suggestion, Who hates autometer!!!
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I don't hate autometer, I hate the crappy way things are put together on the RX-7. Nothing is done like "most" cars.... everything is in the most inconvienent place!
Not to mention how sh*tty they did the stock wiring :) |
well I have personally taped my O2 sensor wire 5-6 inches after the plug, it seems to work fine for me, I have my air pump removed also and acv blocked off
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Anyone happen to have a pic of the tapped wire? Upclose if possible, just to make 100% sure I have the right one....
Something isn't right and I want to figgure out why... I know it's a long shot but so far no one has suggested what may be wrong. |
Originally posted by chris-reed Who hates autometer!!! |
Originally posted by SpYdEr ...just to make 100% sure I have the right one... |
Try the 13th pin, top row, counting from the right to the left. Thats with the connector connected and lookin in the back of the plug.
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