Re: Lean Misfires at 2700-2800 rpm
I just re-read all 13 pages........
What I did NOT find.............
Log data.
The ECU is doing something, perhaps decel fuel cut-off or enleanment (rescaled airflow for injector size for most of you).
Someone (everyone) needs to do some detailed logging of the threshold of this occurance. Look at all the trims, TPS, airflow, trims, injector pulsewidth, etc.
Watching fuel pressure is revealing also, especially when the stock resistor+relay is still on the car. These cars are not set up to easily monitor fuel pressure while driving, but for those with the means, please try it!
Something is happening there. The "open loop test" is a pretty good test to see if it can be changed. I may plug my O2's back in just to see if I can replicate the problem (1991 RT/TT, stock fuel system + bypassed resistor)
Bob
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Need a datalogger? Check out the Scanmaster 3
PM me about ECU mods for 8000+ RPM rev limits !!!!!!!!
Stock = 7300 RPM
Stage 1 = 8060 RPM
Stage 2 = 8200 RPM
Stage 3 = 8400 RPM
Stage 4 = 8800 RPM (By request only)
1991 Stealth RT/TT, Grooms Shortblock, 13G's, Translator Pro, www.maftpro.com
My Stealth is for sale, 65000 miles, runs perfectly. $7,500
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