No start condition when warm looking for suggestions. - Third Generation F-Body Message Boards

bcormier · 08-18-2009, 10:54 PM

I have a 89 iroc 5.7 w/ a maf style TPI.The problem I'm having is a rich fuel mixture and a no start condition when hot. The car starts 1st crank when cold just turns over when warm.My starter turns over fine its not being heat soaked, New dist., new coil, new heated 02 sensor (long tube headers), new spark plugs, havn't changed wires 95% sure that they are fine, have fuel, 44lbs at the rail, good compression, for some reason still getting an orange spark. Battery is new, I have already ohmed the inj., (15.0), knock sensor is good, maf is good, cts is new. I have also verified that the car is reaching open loop. No matter whenever I try to start the car after it is warm (right after shut off up to about 20 minutes) I have a no start condition. Computer is not showing any codes ses light does work. She runs great even when warm just wont start after being shut off. Running out of ideas appreciate any help or suggestions that anyone may have thanks!!

New2Chevy · 08-19-2009, 01:57 AM

Hmmm...interesting. I know that our tpi's love to dump tons of fuel into our engines. It should start whether it's rich or not...sounds like your injectors, but you said you checked them....hmmm...you're not getting any fuel at all, once it's hot, but only after you shut it off. I'll look more into this...give me a while please...I'll get back to ya.