Wont stay running.
#1
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Wont stay running.
I have a 99 GMC cargo van with a 5.7L that wont stay running. I did a tuneup on it and has a hard time staying running. it also kills when you put it in gear. Any suggestions would be greatly appreciated
#2
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Where to start? Did it run okay before the tune up? If so, and if you changed out the spark plug wires, I'd check the order. One may have been switched. If the problem existed before the tune, I'd suspect the fuel pump in the fuel tank. When it fails, it causes the issues you describe.
#3
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I agree with that. Try and do a pressure and volume test, but if it won't stay running that won't work. I'm leaning heavily towards a faulty fuel pump.
Last edited by Twscarp; August 12th, 2017 at 8:57 AM.
#4
You need to check for codes. A bad fuel pump usually just quits, and the van wont start. If you hear it prime when you turn on the key, then its running. As mentioned above it Could be a pressure or volume issue, but that could also mean bad regulator (engine) clogged filter (frame rail drivers side) or faulty poppet valves or injectors (engine).
Too much to chase without a compass.
I had a 2002 and before I sold it, it had a very intermittent issue where I would start the van and it would start normally, but then not idle and ran super rough. The only fix was to shut off the engine, remove the key, and re start. Poof. problem fixed. Gremlins like that can be super hard to find and fix.
Too much to chase without a compass.
I had a 2002 and before I sold it, it had a very intermittent issue where I would start the van and it would start normally, but then not idle and ran super rough. The only fix was to shut off the engine, remove the key, and re start. Poof. problem fixed. Gremlins like that can be super hard to find and fix.
#5
CF Senior Member
You need to check for codes. A bad fuel pump usually just quits, and the van wont start. If you hear it prime when you turn on the key, then its running. As mentioned above it Could be a pressure or volume issue, but that could also mean bad regulator (engine) clogged filter (frame rail drivers side) or faulty poppet valves or injectors (engine).
Fuel filter: 1999 GMC SAVANA 2500 5.7L V8 Fuel Filter | RockAuto
#7
CF Senior Member
You know my fuel filter is inside the tank, 2008 Express 1500 4.3, that's convenient.
Last edited by Twscarp; August 14th, 2017 at 7:28 AM.