Car running lean at idle. And cruising - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nujabe · 11-24-2012, 05:24 PM

So my sr20 just started running lean at idle.. I've checked boost leaks vacuum leaks and I can't find any thing. My adr at idle is 16.5 amd 17.. afr My wide band sweeps when press the gas but it go's back to 1000 rpm but I can here the motor leaning out. So far I unplugged the 02 dident seem to help still ran the same. I then undid the tps this is wear is werid the car won't idle down to 1000 but it idles to 2000 and doesn't run lean around 14 afr. Another side note is when the car is warming up and hits idle temp it does this weird hesitation it's all ways some around 4 times and leans out and then continues to run lean. This is all tuned in a power fc. This just started out of know where about a week ago I haven't been driven on it. I also pulled the plugs they were changes maybe 3 months ago they looks awesome. And help would be great and if I missing any thing let me know thank !

Fml my iPhone makes me look like a stupid fuck but any help would be great thanks again

nujabe · 11-24-2012, 05:25 PM

Also I'm not knocking.. Around 6 at start up nothing more then that.

VATOCLOWN · 11-24-2012, 05:56 PM

did you check for exhaust leaks before the wide band sensor check for cracks on the manifold or broken gaskets.

nujabe · 11-24-2012, 06:07 PM

no i havent ill check. but that wouldnt cause the motor to lean like that. i can here the motor working hard to stay up at idle almost as if there is a small boost leak but theres no leak =( ill check though.

VATOCLOWN · 11-25-2012, 02:23 AM

yeah exhaust leaks will make the car act funny like that. what kind of pfc d-jetro or l-jetro 16-17 might be maxing out the maf and car wants to die this is why you here motor working hard if its map sensor based im betting there is an exhaust leak before the wide band sensor or your fpr is taking a dump

11-24-2012, 05:24 PM	#1
nujabe Zilvia Addict Join Date: Oct 2010 Location: BAY AREA CA Posts: 890 Trader Rating: (9) Feedback Score: 9 reviews	Car running lean at idle. And cruising So my sr20 just started running lean at idle.. I've checked boost leaks vacuum leaks and I can't find any thing. My adr at idle is 16.5 amd 17.. afr My wide band sweeps when press the gas but it go's back to 1000 rpm but I can here the motor leaning out. So far I unplugged the 02 dident seem to help still ran the same. I then undid the tps this is wear is werid the car won't idle down to 1000 but it idles to 2000 and doesn't run lean around 14 afr. Another side note is when the car is warming up and hits idle temp it does this weird hesitation it's all ways some around 4 times and leans out and then continues to run lean. This is all tuned in a power fc. This just started out of know where about a week ago I haven't been driven on it. I also pulled the plugs they were changes maybe 3 months ago they looks awesome. And help would be great and if I missing any thing let me know thank ! Fml my iPhone makes me look like a stupid fuck but any help would be great thanks again __________________ Some black guy who lurks zilvia.

11-24-2012, 05:25 PM	#2
nujabe Zilvia Addict Join Date: Oct 2010 Location: BAY AREA CA Posts: 890 Trader Rating: (9) Feedback Score: 9 reviews	Also I'm not knocking.. Around 6 at start up nothing more then that. __________________ Some black guy who lurks zilvia.

11-24-2012, 06:07 PM	#4
nujabe Zilvia Addict Join Date: Oct 2010 Location: BAY AREA CA Posts: 890 Trader Rating: (9) Feedback Score: 9 reviews	no i havent ill check. but that wouldnt cause the motor to lean like that. i can here the motor working hard to stay up at idle almost as if there is a small boost leak but theres no leak =( ill check though. __________________ Some black guy who lurks zilvia.

11-24-2012, 05:56 PM	#3
VATOCLOWN Leaky Injector Join Date: Jun 2009 Location: LA Posts: 133 Trader Rating: (3) Feedback Score: 3 reviews	did you check for exhaust leaks before the wide band sensor check for cracks on the manifold or broken gaskets.

11-25-2012, 02:23 AM	#5
VATOCLOWN Leaky Injector Join Date: Jun 2009 Location: LA Posts: 133 Trader Rating: (3) Feedback Score: 3 reviews	yeah exhaust leaks will make the car act funny like that. what kind of pfc d-jetro or l-jetro 16-17 might be maxing out the maf and car wants to die this is why you here motor working hard if its map sensor based im betting there is an exhaust leak before the wide band sensor or your fpr is taking a dump