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Pickups Chevrolet Silverado & GMC Sierra Chevy Silverado and GMC Sierra Starting Problems
193 messages, Last post on Nov 16, 2009 at 4:26 PM
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Replying to: dynomutt (Apr 14, 2008 9:22 am) Have you tried testing the individual connectors for power with a voltmeter? I understand you're doing this as a favor. That price of this favor is really high and I would consider it a favor if the guy took his truck somewhere else. Electrical problems are a pain cause they sometimes take way too long to troubleshoot. Course this may not help your situation. Oh one last thing. Have you checked the fuses. If I'm not mistaken the OBDII is on a fused connection.
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Replying to: obyone (Apr 14, 2008 11:10 am) Thanks for you help so far. Mike
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Replying to: dynomutt (Apr 14, 2008 11:21 am) thanks Leon |
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| I own a 99 silverado,5.3.had problems starting in the pastso i came here.I changed the full pressure regulater and it was fine.The problems arose again so i changed it again oops did'nt help.filter is good,pressure seems good.can anyone give me a punchlist to check?new battery starter fuel filter,air filter the basics have been addressed. | |
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Replying to: yamahog (Jul 16, 2008 3:10 pm)
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I have serched but didn't find the same problem i'm having so this is it. I have a 1997 gmc that will not start, I have 60psi fuel for the first two seconds or 50+ while trying to start. It will start and run if you put gas, starting fluid etc.. down the intake. but will not start back unless you do the same. It has not set a "check enging light" so I don't think it would have a code bit set. This is not the first time I have ran up on this problem, I had a similar problem with a 99 Tahoe. It would start then stall, most of the time while the air was damp. Thanks in advance for any ideas. Lynn Davis |
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Replying to: lynn0335 (Aug 31, 2008 10:08 am)
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Replying to: obyone (Aug 31, 2008 10:20 am) I'll do some more checking. I failed to mention that I removed the return line from the intake and installed a rubber hose in its place, cranked the engine over the press was 50+ psi but no gas out of the return line. That seems strange to me, I would have thought the pump would supply the gas then the regulator would let only what was needed go to the injectors and return the rest to the tank. Thanks Lynn |
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Replying to: obyone (Aug 31, 2008 10:20 am) I have made some more checks and found two codes P0118 coolant sensor high and P0122 throttle/pedal sensor low. I replaced the crank sensor, testing I had no 5vac. I do now but still will not crank unless you put some gas in the intake. Do you think the cam sensor could cause it not to start? Oh yea, I am using my spare key that is almost new. I was told if the key was worn it could be a security issue. Any help is appreciated. Lynn
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Replying to: lynn0335 (Sep 03, 2008 3:12 pm) P0122- TPS sending signal too low voltage. Could be short to ground; not securely installed; or defective TPS. This normally would cause rough/low idle and/or stalling. I think your best bet would be to check out the ECT first then the TPS since you have the codes and the ECT could cause a no start condition. Hope this helps. |
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