Re: Lean Misfires at 2700-2800 rpm
The O2 trim hitting 160 and then dropping is a huge indicator of whats going on.
The short term trim is running out of adjustment range, and the ECU is "defaulting" or something. Watch the O2 trim just before it starts to act up and see if it is climbing with RPM.
Basically, if it is what I think it is, "its your fuel map, its got a nasty hole"..... (to quote a cheesy movie)
forcing the ECU into open loop (disconnecting the O2 sensors) patches the hole.
Anyone else got logs......?
B
__________________
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. $8K
|