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SVTPerformance's Chain of Restaurants
Tuning À la carte
[help] Cold Tip-in Issue
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<blockquote data-quote="itzl0l" data-source="post: 14433745" data-attributes="member: 98334"><p>From what I can tell, if i force open loop the car is MUCH richer when cold than it is when HOT. These cars go to Closed Loop so quick even when cold, so if the car is in Closed Loop cold and trying to maintain stoich it applies a large correction factor. I've seen stft corrections of 1.15 and up (about 15% rich) when cold. When rolling into the gas just a bit it will go lean until the stft's can pull that correction out.</p><p></p><p>I have another odd issue with a lean spot @ 1500 rpm's. I've tried everything to fix it even messing about with injector slopes. I'm starting to think its some sort of mechanical issue...maybe flaky cop, cam sensor or something...very wierd.</p></blockquote><p></p>
[QUOTE="itzl0l, post: 14433745, member: 98334"] From what I can tell, if i force open loop the car is MUCH richer when cold than it is when HOT. These cars go to Closed Loop so quick even when cold, so if the car is in Closed Loop cold and trying to maintain stoich it applies a large correction factor. I've seen stft corrections of 1.15 and up (about 15% rich) when cold. When rolling into the gas just a bit it will go lean until the stft's can pull that correction out. I have another odd issue with a lean spot @ 1500 rpm's. I've tried everything to fix it even messing about with injector slopes. I'm starting to think its some sort of mechanical issue...maybe flaky cop, cam sensor or something...very wierd. [/QUOTE]
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SVTPerformance's Chain of Restaurants
Tuning À la carte
[help] Cold Tip-in Issue
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