Dead cylinder/low compression guys come on in - Ford Powerstroke Diesel Forum
6.4L Performance Parts Discussion What has or has not worked for you?

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post #1 of 17 Old 10-09-2013, 10:31 AM Thread Starter
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Dead cylinder/low compression 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.

2010 F350 CCLB King Ranch. Mini Maxx Race - CAC Pipe - DPF MIA - Sinister Coolant Filter - Sinister EGR Delete - No Limit Intake - Custom CCV mod using stock parts - Devils Own W/M

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post #2 of 17 Old 10-09-2013, 11:29 AM
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Can you post a video of what you are talking about. It would be easier to diagnose if I / we could hear the sound.

2010 Ford F-250 Super Duty, Lariet 4x4, Crew Cab Short Bed, loaded with every option...and more


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post #3 of 17 Old 10-09-2013, 11:32 AM Thread Starter
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I will when I get home. May have to email it as I only have a phone and I pad at home. Thanks for the reply.

2010 F350 CCLB King Ranch. Mini Maxx Race - CAC Pipe - DPF MIA - Sinister Coolant Filter - Sinister EGR Delete - No Limit Intake - Custom CCV mod using stock parts - Devils Own W/M

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post #4 of 17 Old 10-09-2013, 01:21 PM
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If anything it sounds like you would have a bent pushrod. Not a dead cylinder

2010 CC/SB FX4 Lariat.. Tuned By Eric@IDP and Matt@Gearhead

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post #5 of 17 Old 10-09-2013, 02:17 PM
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Quote:
Originally Posted by WoodBoy View Post
If anything it sounds like you would have a bent pushrod. Not a dead cylinder
That is what I'm thinking too....However, I would like to hear the noise before I jump conclusions. If it is a bent rod, it would be time to do a few upgrades.

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post #6 of 17 Old 10-09-2013, 03:47 PM Thread Starter
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I thought pushrods too but it only does it when it's warmed up. Do you guys normally do valve adjustment on these fords? Almost maybe once hot an exhaust valve or rocker is doing its expansion and staying open to long. I will have to try the vid tomorrow. Thanks for the input

2010 F350 CCLB King Ranch. Mini Maxx Race - CAC Pipe - DPF MIA - Sinister Coolant Filter - Sinister EGR Delete - No Limit Intake - Custom CCV mod using stock parts - Devils Own W/M

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post #7 of 17 Old 10-09-2013, 05:35 PM
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There is no valve adjustment. Have you tried scanning for codes? We need a video or something

2010 CC/SB FX4 Lariat.. Tuned By Eric@IDP and Matt@Gearhead

Thinking about getting rid of the stock 6.7 turbo?
Check this out... and research before buying



http://www.powerstroke.org/forum/6-7...ustration.html

http://www.powerstroke.org/forum/6-7...round-2-a.html
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post #8 of 17 Old 10-10-2013, 04:13 AM Thread Starter
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Thats good to hear. Sorry guys coming from a cummins; trying to figure out their differences. So with no valve adjustment I could pull the rockers and rods out this weekend and inspect... and just put them back in and tourque the rockers. Can you get the push rods on 7 and 8 out with cab on?

No codes at all. I will get a video today hopefully.

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post #9 of 17 Old 10-10-2013, 06:33 AM
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Yes rockers and pushrods can be done cab on.

08 F350 cc/sb 4X4
h&s minimaxx, 5" flo pro, 4" down pipe, no limit cold air intake, dirty diesel EGR delete with intake elbow, 6.0 exhaust manifolds, custom up pipes, ported intake manifold, Apex 71mm LP turbo, Rudy's cold side pipe, diesel site coolant and transmission filter, diesel site intercooler boots, ccv mod, bilstein shocks, gogo dd solenoid, HID lights, Airdog II 165, PMF traction bars, PMF drag link, moshimoto aluminum radiator
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post #10 of 17 Old 10-15-2013, 08:37 AM Thread Starter
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Well guys I may have solved the issue. I noticed a little gray/black smoke. Probably white with black (looks gray mixed) on medium take offs. Thought maybe an injector was sticking. Ran a heafty amount of diesel clean through it last night and it runs/sounds a lot better. Hopefully it was just a sticky injector not atomizing. We will see.

2010 F350 CCLB King Ranch. Mini Maxx Race - CAC Pipe - DPF MIA - Sinister Coolant Filter - Sinister EGR Delete - No Limit Intake - Custom CCV mod using stock parts - Devils Own W/M

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