Dustin Murry
Newbie
I'm having some weird driveability issues with my 99 suburban. What I am requesting is for anyone of you who have access to a scan tool or the such to provide me with your ECM data. I need ltft stft MAF g/s etc. Of your engine at idle. I have a fresh engine with excellent compression. A new Delphi pump, Delco mpfi injector conversion. Fresh tune-up etc. My engine hesitates out of the hole for about 150-200 feet then clears up. And doesn't act up again until I shut it off and start it again. also the exhaust smells of gas and will burn your eyes. any given time if I check my fuel trims the lt is about -18% and the st is about -3% at idle. The maf reading is 6 to 7 g/s. My fuel pressure is kind of low at 52-54 psi. I used a bore scope and inside of the intake is dry and so are the tops of the Pistons. I'm at a loss here. I don't understand why I have low pressure, but a rich condition.
Thanks in advance for any input.
Thanks in advance for any input.