V10 Coil Pack Specs
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Captain
Joined: Jan 2016
Posts: 593
Likes: 8
From: Shawnee, KS
That sounds like worn valve guides.... You won't necessarily see any smoke from them. These engines burn really clean, and the cat also cleans things up a bit. My old 360 would suck down a quart of oil every 150 miles...... which you would expect would make the truck look like a mosquito fogger.... But, it didn't...... only time I got smoke was at large throttle openings.
Administrator
Joined: Apr 2010
Posts: 87,480
Likes: 4,223
From: Clayton MI
Leakdown test won't tell you if valve guides are bad. That requires a physical inspection.
Edit: Of course, the bouncing needle also could be an indication of misfires..... how fast it is bouncing is the way you tell between them.
Edit: Of course, the bouncing needle also could be an indication of misfires..... how fast it is bouncing is the way you tell between them.
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Captain
Joined: Jan 2016
Posts: 593
Likes: 8
From: Shawnee, KS
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Captain
Joined: Jan 2016
Posts: 593
Likes: 8
From: Shawnee, KS
I will try that out, hopefully this weekend, and see what happens. Thanks
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Captain
Joined: Jan 2016
Posts: 593
Likes: 8
From: Shawnee, KS
Most of what I've read about the vibrating needle does go along with what you guys are saying. I've found a few places where it states this can be an ignition issue as well. Will hopefully get it figured out soon.
Legend
Joined: Nov 2014
Posts: 8,098
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I'll read up and let you know. You do have misfires, correct?
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Captain
Joined: Jan 2016
Posts: 593
Likes: 8
From: Shawnee, KS
Yep, the engine shake isn't felt bad in the truck, but obvious with the hood up and your hand on the engine. The misfires are random and some are stronger than others.
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Captain
Joined: Jan 2016
Posts: 593
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From: Shawnee, KS
https://actron.com/content/engine-pe...g-vacuum-gauge
Under General Ignition Trouble or Sticking Valves
Under General Ignition Trouble or Sticking Valves