Knock/tapping sound - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 01-29-2011, 03:25 PM Thread Starter
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Knock/tapping sound

Okay guys. My 02 is giving me the run around with a knocking sound. Everyone swears it is an injector stuck open and what I am hearing is fuel knock (loud). I have done a lot looking to fix this sound. I can unplug the #3 injector and the sound goes 70% away. Unable to really hear if from an open valve cover or the top of the motor but can hear it from the wheel well. Plug it back in and the sound comes back to full volume. It seems like I have narrowed to cyl #3 but NOT the injector (replaced it anyway...twice). I don't think it is loud enough to be a rod knock (doesn't sound like someone hitting the engine with a hammer...) What can be my problem when there is combustion the noise is louder than when there is no fuel being added to that cyl???? Anything will help. Probably have tried it but?
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post #2 of 2 Old 03-23-2012, 04:38 PM Thread Starter
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Well this problem finally ate the bullet that 7.3's are impervious to. Had to rebuild the motor. So far I am very impressed with Pat out of Ft Pierce. He bored the cyl out .030 over, all new bearings, pistons,rings all new seals oil pump. I can't say enough good about the job
Go to powerstrokepro dot com. $5000 and he had it done in 4 days. Back Rollin on a "stock" tune. This thing with 4:56 gears and 37" tires. Perfect ratio. Happy again.


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2002 PSD Super Duty Crew Cab 4WD
1805 Superchips Flashpaq, K and N cold air intake, 5" exhaust, 35's on stock wheels and 4:56 gears. 155K miles with BIG air horns. HIgh output alternator to run the amps

1999 PSD Super Duty 2WD
1705 Superchip, 80k miles with utility bins on it for work.

2001 PSD Super Duty Crew Cab
1805 Superchip Flashpaq. 35" tires on stock rims

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