Bad knock
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Senior User
Joined: Jan 2010
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From: East Tennessee
Bad knock
So was sitting at an idle in park and truck starts knocking, horrific sound. So shut checked oil, good, went to work came out 8 hours later, started up still knocked. Pulled into drive hit the pedal, knock went away, stopped at red light, knock came back......Truck has been parked for 3 days, still knocks at an idle but soon as tap the pedal and give fuel it goes away... Tried unplugging injectors one at a time to eliminate, still had knock. any suggestions???????
Sorry forgot the details::::: 2003 auto, 4wd, studded,deleted, coolant filter, sct with innovative tunes 108,000 miles.
Sorry forgot the details::::: 2003 auto, 4wd, studded,deleted, coolant filter, sct with innovative tunes 108,000 miles.
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Joined: Feb 2014
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is it smoking and stinking smoke? if so injector could be stuck open, unplugging wont matter because it is mechanically stuck open. if it was a lifter or valve train component it would miss. as soon as u give it fuel the rpm goes up and uses the fuel instead of "flooding" it , of sorts. usually it will smoke like hell and smell raw fuel out tail pipe. the good thing is if u replace failing injector it usually causes no damage, if it was a 6.4l the engine would be junk. hope this helps.
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From: East Tennessee
Sad part is the injectors are all new, well new Re-mans....less than 500 miles and 2 weeks on them.. Next question, how to determine which injector. Rockers and lifters and such have no obvious issues, just looking at moving and such
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From: Nortern FL
That's what I was thinking.
Loose flex plate bolts or cracked flex plate?
Easy to check...
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