I just bought a 91 s10 4.3l tbi, last week that had been sitting for a few months. Yesterday coming back from my lunch break I was pulling into the parking lot when the engine died. On re-start, it would turn over and run for a second, then quit. Now if I feather the throttle it will stay running (really bad and even backfire through the "carb", almost like it is out of time) the faster I feather it the smoother it will run, which leads me away from timing issue and into fueling, when I turn the key I can hear the fuel system pressurizing, and I just got back from an 1100 mile trip this weekend with no problems, so condensation in the tank isnt looking to be an issue, I check the dist. Cap and it isnt loose. I have not tested the fuel pressure as of yet, which I plan on doing hopefully today if the storms clear up. Ive read up a bit before posting this, that possible reasons could be the egr valve being stuck open, and/or the ecm being toast. Problem is I haven been able to locate the ecm to visibly inspect the card, (only had the truck now for about 3 days. And two of them have been on the road driving it.
EDIT******************************
last night fed her starting fluid through the throttle bodie, and she started up and ran good (as long as starting fluid keeps being squirted), BUT the injectors ARE pulsing and you can visibly see them squirting. Now im at a loss, going to pull off the injector assembly today/tonght. And see if garbage has collected in the bottom of them. Oh yeah the cap/rotor/ and ign. Ctl mod are new as well.
UPDATE*********************************
jumped a and b under the dash and the only code that came up was 24 IIRC which according to the guide I found online is a VSS code. Doesnt seem like it would be a reason for the no-start, but figured I would hrow that in as well.
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Tuesday, April 14th, 2009 AT 8:36 AM