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2000 Ford F-250 spark knock

Tiny
AFFORDATRUCK
  • MEMBER
  • 2000 FORD F-250
Computer problem
2000 Ford F250 V8 Four Wheel Drive Manual 137k miles

all new sensors have been changed. All the gas ran out and new put in. New plugs and coil packs.

still knocks

i'm a used truck dealership. Light duty to heavy duty. If you can answer this question I will pay for other answers. Cause this truck has cost a fortune but I have two other trucks that do it.
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Tuesday, September 9th, 2008 AT 3:11 PM

2 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Was the knock sensors replaced on rear of engine one on each head?
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Tuesday, September 9th, 2008 AT 3:20 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Probably too much carbon built up in the cylinder heads, try combustion chamber cleaner, all manufacturers sell a product to de-carbon.
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Tuesday, September 9th, 2008 AT 3:34 PM

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