for sometime now when i 1st start the car cold or warm, my stft maxs out 25% ltft is on its way up.. but once i rev it super hard or let it max out and just drive it for 10 seconds my fuel trims will act normal like it should. What could cause this? once in a while i get a system too lean code... just makes me wonder... thanks guys Michael 99gs HRC Stage IV 8-Injector Setup 2GNT Member #32
#62001, "RE: 25% for stft and ltft goes up too??" In response to Reply # 0 Dec-11-03 05:18 AM by Corbin
I believe the car stays in open loop for a certain period of time after you start the engine. It will also watch the ECT to determine when to switch from open to closed loop. It takes several seconds for my O2 sensor to start cycling right (when I start the engine cold or warm). I think thats all you're really seeing. I never pay attention to fuel trims until the car has been running for a few minutes.
Corbin
'95 ESI-T HRC+FMIC+ETC...
Gimme fuel...Gimme fire...Gimme that which I desire
#62008, "RE: 25% for stft and ltft goes up too??" In response to Reply # 2
cool.. im not to worried about the fuel trim maxing at 25% per say.. but i hate it in regards to it turning on my cel for a 'system too lean' code. Its like it only does this sometimes which makes me wonder. Michael 99gs HRC Stage IV 8-Injector Setup 2GNT Member #32
#62019, "RE: 25% for stft and ltft goes up too??" In response to Reply # 4
now= 49.. i tried 47 and i tried 62psi for idle fp.. and it still maxes out but with the 62psi of idle fp i dont remember getting a system too lean code. Michael 99gs HRC Stage IV 8-Injector Setup 2GNT Member #32
#62023, "RE: 25% for stft and ltft goes up too??" In response to Reply # 5
after i leave my house in the morning for work i get a CEL when my car is cold too, especially when im sitting still. she just needs to get warm and shes good _________ 96 talon esi-t san clemente, ca
DarkOne> Screw you guys, i'm going home. chrysler kid> and fyi i have never HAD to shave. DR1665> I'm sure your Talon and my Talon are all there needs to be, since we're the only two Talons that really matter around here
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