Knocking at idle to 1500 rpm only need help

S

Suzuki450ltr

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Sep 17, 2015
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I have a 03 cummins and it knocks at idle to 1500 but then goes away I have checked the flywheel already so I'm thinking its a rod knock or a timing knock because I have 180hp industrial injection injectors but I'm not sure. The truck runs fine and has plenty of power. It's been knocking for 5000-10000 miles.
 
[ame="http://www.youtube.com/watch?v=GPNzBM8FAjA"]http://www.youtube.com/watch?v=GPNzBM8FAjA[/ame]
 
No they just reclocked it. Apparently it can get in sync with something and start making noise. Mine started after I made a WOT pull so maybe it slipped. I dont think its harmful just annoying.

I don't exactly remember what all the symptoms were mine may have done that as well.
 
Yeah if it started right after you put that on I'd put money on the cp3 gear

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you can real simple! One big nut and washer. pop loose with a steering wheel puller turn 180 and tighten nut! AND DONE!
 
Yes. Some manufacturers time the injection pump to reduce THV and moderate rail pressure deviation.

You could do the math and sync a cp3 if you really wanted.

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No "timing" is involved in indexing the CP3 pump gear. That phenomenon (tick) is something that can happen if the pistons in the pump are synced with an injection event. When you move the gear, you're only trying to move away from that "synced" event to eliminate the extra noise. Its not usually an issue but it does happen.
 
CatKracker said:
No "timing" is involved in indexing the CP3 pump gear. That phenomenon (tick) is something that can happen if the pistons in the pump are synced with an injection event. When you move the gear, you're only trying to move away from that "synced" event to eliminate the extra noise. Its not usually an issue but it does happen.
Click to expand...
I guess I was too vague?

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