Reduced Engine Power? Someone Please HELP!
Reduced Engine Power? Someone Please HELP! Ok so I put in new injectors and it threw my car way off tune. I went from SVO 42's to Siemens 57's. I used the table from the stickies to calculate my IFR and the car would barely run. I used a different table from another person and the car is now running ok. I went back to a stock tune with an IFR change and it idles and part throttle's just fine. It is somewhat rich by my wideband but lean on my LTFT??? So today I decided I was going to try and get my PE table somewhat in range, as soon as I got boost... BANG!!! It went into reduced engine power and limped back home. What could possibly be the problem here? I am running in open loop.
99 Corvette
Vortech-9psi
57# injectors
Stage 5 Head and Blower Cam
8.3 Compression
alky injection
99 Corvette
Vortech-9psi
57# injectors
Stage 5 Head and Blower Cam
8.3 Compression
alky injection
Check for any codes, possibly immature, while
the car is doing this. There are some that check
for discrepancies between calculated airflow and
the expected air from a given throttle position,
this often needs adjusted when you put in a cam
that jacks the operating MAP around (leading to
an over-calculation of air for this diagnostic). To
boot, forced induction on a 1-bar MAP sensor can
fault it the other way (MAP based air calc is short
of reality). If this is an electric throttle car, seems
to me this is your likeliest pony.
the car is doing this. There are some that check
for discrepancies between calculated airflow and
the expected air from a given throttle position,
this often needs adjusted when you put in a cam
that jacks the operating MAP around (leading to
an over-calculation of air for this diagnostic). To
boot, forced induction on a 1-bar MAP sensor can
fault it the other way (MAP based air calc is short
of reality). If this is an electric throttle car, seems
to me this is your likeliest pony.
