Attention all knock noise experts - Ford Powerstroke Diesel Forum
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Old 05-06-2013, 06:14 PM
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Attention all knock noise experts

i have been chasing this noise on the passenger side sounds like cylinder 1, it sounds just like a rod knock on a gas engine but i can only hear it at idle, there are many examples of the noise on youtube.com (
), with most people figuring out that they have a bad lifter which is return also kills the cam or a bad injector, so to find the noise i used a stethoscope and it sounds like the noise is defiantly in the head area on #1, so i unplugged the injectors on that side one at a time and no difference, so this past weekend i took the cab off, and got the passenger side head off and checked all my push rods, rocker arms, and took the lifters out and every thing is perfect cam looks good too, the only idea i have at this point is maybe a injector is leaking and causing a fuel knock, but im not sure if it possible to still leak even when the electrical plug is disconnected, please let me know what you guys think, also shot me any ideas you have for this annoying noise
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Old 05-07-2013, 05:31 PM
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It's very possible for an injector to be leaking even with it unplugged. If the pintle in the nozzle is stuck up it will continually flow fuel and cause a knock. With the IDS scan tool you can watch injector balance rates and see which cylinder is over contributing. Since you have the engine apart you might as well send the injectors in for testing and they can find the faulty one.
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