Originally Posted by Six_Shooter
even though the EEC has sequential injector pulses?
even though the EEC has sequential injector pulses?
To me "firing order" is ignition side.
"Injector order" is different. ;)
The man who says something is impossible, is usually interrupted by the man doing it.
Fine, Injector order...nit picker!
The SFI may effect idle or could be turned off, not sure how newer cars work but the LT1 is only SFI in idle very low RPM, then batch fire. Just not enough time to fire each injector at higher RPM with cars of this era.
Are newer cars sequential at more then idle RPM? I was told that idle emmisions was only reason for this at time, had no impact on drivability or performace cause there's just not enough time to turn on/off injector for each cylinder.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
don't suppose you can throw 2 injector circuits on a scope and confirm this? seems odd that it would switch out. my 95 MC should be SFI at all times, but i don't have a scope to confirm it.
i made a thread on 60V6 about the differences in single fire MPFI, double fire MPFI and SFI.... it wouldn't bother me one bit if SFI had yet to be invented.
1995 Chevrolet Monte Carlo LS 3100 + 4T60E
From many years of SFI discussion it seems that most manufacturers switch between SFI and batch fire at around 3000 RPM.
The man who says something is impossible, is usually interrupted by the man doing it.
There is a Constant in TunerCat $EE I do not have in TunerPro $EE which would tell us when it happens in an LT1 called :
"Individual Cyl. Fuel Trim Disable %TPS"
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
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