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GTP lean condition

G

gerhardt02

New member
My '02 is having very lean conditions as of recently. I put a short ram intake with an oiled filter on and since then the car will run very lean (it threw a P0171 bank 1 lean code), and sometimes will have a hard time idling smoothly. The rpm's will fluctuate from about 800-2100 at idle and has killed a couple times. I cleaned the MAF, TPS, and IAC sensors and this helped the idle problem but it still seems to run lean. I thought it was a vacuum problem but i checked all the lines without luck. I also get a sort of rotten egg like smell from the cat, but am not sure if this has anything to do with the issue. The spark plugs are white on the electrodes.
 


i work at an auto parts store and throwing a lean code means u have a vacuum leak somewhere, we see those alot. could be a hose or a gasket. check them all.
 
I haven't checked the O2 sensor yet, I did put an A/f Ratio gauge with a splice, maybe that could affect the fuel trims? And i dont know when the fuel filter has been replaced, i ordered one from ZZP so i am going to replace that soon.
 
gerhardt02 said:
I haven't checked the O2 sensor yet, I did put an A/f Ratio gauge with a splice, maybe that could affect the fuel trims? And i dont know when the fuel filter has been replaced, i ordered one from ZZP so i am going to replace that soon.
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The a/f gauge ( if you installed it correctly) wont affect the fuel trims. Also im guessing you have a narrowband a/f gauge which is extremely inaccurate. I have one and it really doesn't do much.
 
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