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Old 09-28-2012, 03:21 AM
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1999 chevy express 5.0

running great turn a corner and it shut off? i put new fuel pump its at 65 after 5 mins at 60 pounds i also put another pcm i swaped out from my 1996 5.7 running truck/ cam sensor/ing mod/coil/it doesnt show spark at coil ? and if i spray starting fliud it starts for a second? ive had 3 cert/mech trying to help me they are stumped?

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Old 09-28-2012, 03:52 AM
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Sounds like a wiring problem to me, possibly loose/broken wire.
Is it getting power to the Coil?
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Old 09-28-2012, 09:45 AM
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Install a fuel pressure gauge where you can see it while you drive. What's the pressure doing when the engine shuts off? If it starts with ether, it's a fuel delivery problem. Start troubleshooting there. I remain mystified why people immediately change the PCM for any problem. It rarely goes bad, but at least it's expensive. Do some no-cost troubleshooting first, THEN spend money.
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Old 09-28-2012, 03:37 PM
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There were some fullsize GM trucks that had an issue with the wiring to the pump inside the tank. They would shut off while driving and then restart. There was a redesigned harness for those trucks.
Just an idea to explore.
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Old 09-28-2012, 04:00 PM
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Does it have a rollover protection switch? My girlfriend had a car with one in it years ago and the switch would trip for no reason, cut power to the in-tank pump. Drove me nuts for a weekend.
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