Timing chain replacement

2004 GMC YUKON
209,000 MILES • 8.1L • V8 • 4WD • AUTOMATIC
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BURNSHB1985
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I replaced my timing chain, water pump, belts hoses, cam position sensor ACDelco 2133826, and ACDelco 214-1105 GM Original Equipment Vapor Canister Purge Valve. The engine only starts every other attempt, and has been occasionally having a miss or two at stoplights, but otherwise is running strong.

Thank you for your input.
Aug 11, 2019 at 11:57 AM
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BURNSHB1985
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Here is a video of the issue, which occurs 95% of the time i try to start the engine.

Thanks for looking
Video (Click to enlarge)
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Aug 11, 2019 at 12:08 PM
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ASEMASTER6371
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Good afternoon,

Does it crank over when it will not start?

Are there any codes?

Did you clean the throttle body?

https://www.2carpros.com/articles/throttle-actuator-service

https://www.2carpros.com/articles/stall-at-idle

Roy
Aug 11, 2019 at 12:10 PM
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JIS001
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Hi, just wanted to join in as well. The crank no start issue, does it happen when it sits for a few hours or overnight? If that is the issue, I recommend you hook up a fuel pressure gauge. Turn key on and start it. After, shut it off and let it sit and make a note of the pressure when you shut it off and check the pressure again in about an hour. If low, check the fuel pressure regulator for a leak. Here is a link on how to check fuel pressure issues:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Aug 11, 2019 at 4:54 PM