Timing chain replacement

BURNSHB1985

MEMBER
2004 GMC YUKON
8.1L
V8
4WD
AUTOMATIC
209,000 MILES

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.

3 Replies

BURNSHB1985

MEMBER
2 POSTS

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 make bigger)

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Sunday, August 11th, 2019 AT 12:08 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

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

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Sunday, August 11th, 2019 AT 12:10 PM

JIS001

MECHANIC
3,411 POSTS

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

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Sunday, August 11th, 2019 AT 4:54 PM