After replacing the timing chain for the second time, when I press the accelerator pedal it jumps timing and starts running very rough?

Tiny
JETTLEE
  • MEMBER
  • 2008 FORD MUSTANG
  • 4.6L
  • V8
  • 2WD
  • MANUAL
  • 120,000 MILES
The car listed above is a GT. I've put timing chain in twice. It cranks perfectly idles great, as soon as I hit the gas pedal it jumps timing and starts running very rough. Idk why.
Thursday, April 20th, 2023 AT 5:08 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,675 POSTS
It sounds like the timing chain tensioner is not working. Did you replace that as well? I and if so, did you remove the lock pin from it? Here is what I am talking about. Also, did you replace the timing chain guides as well? Please check out the images below to see what I am talking about. Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.
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Friday, April 21st, 2023 AT 2:10 PM

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