How lean does adding test pipes actually make the AFR mixture?
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test pipes wont make your engine run lean. decrease fuel flow, or create a vaccum leak and your engine will run lean. i can gurantee it will make your service engine soon light come on with the quickness though.
Test pipe,s will make you run leaner as with any increase in air flow should be countered with an increase in fuel flow.I asked my tuner,dave at functiontuned if i could just add my test pipes and wait a while before getting it tuned and he said it will run lean on the top end.I am waiting until next week to put these on and staying out of boost till i get tuned to be on the safe side.
Originally Posted by cmthresher
no engine light here. The text pipes wont throw the 03's.
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I have test pipes on mine, Will. I had SGP retune it afterwards also. I have the 04[.5] so the CEL is on constantly 
SGP also told me that putting non-foulers on would mess up how they tune the car or the way the A/F reads or something... I have no idea [coulda been a line?]. Might be different for the 03's there also.
SGP also told me that putting non-foulers on would mess up how they tune the car or the way the A/F reads or something... I have no idea [coulda been a line?]. Might be different for the 03's there also.
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From: NY
Originally Posted by HomieG35
I have test pipes on mine, Will. I had SGP retune it afterwards also. I have the 04[.5] so the CEL is on constantly SGP also told me that putting non-foulers on would mess up how they tune the car or the way the A/F reads or something... I have no idea [coulda been a line?]. Might be different for the 03's there also.
SGP also told me that putting non-foulers on would mess up how they tune the car or the way the A/F reads or something... I have no idea [coulda been a line?]. Might be different for the 03's there also.Where is the non-fouler attached? is it Before Cat or After?
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FI'ed G, I don't have foulers at all, SGP told me that it would make for problems when it came to tuning... so I never put any on.
I know what you mean, Moog, the exhaust gets alittle raspy up top... atleast with my cats.. but I love the grunt cruising around parking lots, lol
I know what you mean, Moog, the exhaust gets alittle raspy up top... atleast with my cats.. but I love the grunt cruising around parking lots, lol
