Rough Idle and SES Light After Plugs, Belt, Tensioner

The Gas and Diesel Engines - VQ40De, VK56DE, YD25DDTi, V9X, Transmission, Transfer Case, Oil, Differentials, Axles, Exhaust...

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eieio
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Postby eieio » Mon Sep 04, 2017 10:33 am

heckler40 wrote:
eieio wrote:
heckler40 wrote:I did but not completely off. Didn't even take the brake vacuum off.
I'd suggest that you check for vaccum leaks and/or mis-connected hoses in the related areas.
Thinking this through, checking for a leak may be my next step. I've felt all around all hoses and visually checked the best I can. My gut is telling me the sound when pressing the accelerator could be the engine pulling in additional air. I checked the drivers side but can't check the passenger side due to everything in the way.

Maybe I hit the intake collector gasket? Here's a link to the video. Input appreciated.

https://www.dropbox.com/s/p8jngka7yausq ... 6.m4v?dl=0
An intake leak will usually respond to a shot of WD40 in the suspected area, by either a drop or a rise in idle speed as the vaccum leak sucks in the WD.


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disallow
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Postby disallow » Mon Sep 04, 2017 10:35 am

Sometimes that gasket doesn't like to sit down properly. I'd recheck...

heckler40
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Postby heckler40 » Mon Sep 04, 2017 11:17 am

Ran carb cleaner all over the intake and related spots with no change in idle. Not sure where to go now.

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disallow
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Postby disallow » Mon Sep 04, 2017 11:39 am

Back to a loose or poorly connected coil pack.

I personally hate how these things are built. Way to flimsy in my opinion.

heckler40
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Postby heckler40 » Mon Sep 04, 2017 8:26 pm

Took a break. I was stressing, overthinking and getting tunnel vision.

Went back and found a loose harness on the back of the intake more towards driver side. Didn't look it up but assume it's a fuel injector. Thanks for all the input.


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