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Old 10-09-2013, 11:27 AM
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Low compression/dead cylinder guys come on in

Alright guys, latley my 2010 with mods in the sig 57k miles has developed that "thop thop thop" sound at idle. I know that is somewhat normal for these trucks but it seems a bit excessive. I am trying to diagnose it..

No burnt oil
No white smoke
No extra oil
No miss
No power loss
No hard start

I may be over thinking it but you can even here it when throttling. Noticed a couple days after the EGR delete. Hear it through the filter and tail pipe through the cab. Doesn't do it until it has been warmed up for 10 or so miles. The harder/longer the drives the louder it is. I know you lose compression once warmed up. Trying to avoid doing a compression test or going to the dealer.

Thoughts?

Thanks in advance.
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Old 10-11-2013, 08:30 AM
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Get a compression test first... then put the truck back to stock take back to dealer lol...
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Old 11-15-2013, 08:14 PM
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You said its coming from intake or exhaust? Take breather off and fire it up. If its obnoxiously loud might have gotten a piece of trash in intake somehow during reassembly. That happened to me once. It tweaked an intake valve just barely to where it wouldn't seat
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Old 11-16-2013, 03:10 AM
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So no symptoms other than a noise? Can you post a video so we can hear the noise?
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Old 11-17-2013, 06:01 AM
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Also ive seen exhaust seats crack. Just a heads up
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