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Rough idle no power

 
Old 03-14-2019, 07:20 AM
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Swapped injectors have antiseize on plugs. Even Put mood lights on connectors to check if they were getting fire. Everything checks out fine. It all comes back to #8 cylinder no matter what I do. I was thinking weak valve spring or flat lobe on the cam but I have 151 psi on the cylinder which sends me back to electronics I would think
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Old 03-14-2019, 08:43 AM
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Originally Posted by Wetfit View Post
Swapped injectors have antiseize on plugs. Even Put mood lights on connectors to check if they were getting fire. Everything checks out fine. It all comes back to #8 cylinder no matter what I do. I was thinking weak valve spring or flat lobe on the cam but I have 151 psi on the cylinder which sends me back to electronics I would think
How does that cylinder compare to the other cylinders? That is more telling than its compression.
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Old 03-14-2019, 08:50 AM
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Anti seize on the plugs.. wonder if some migrated down to the electrode...
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Old 03-14-2019, 09:46 AM
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Originally Posted by techrep View Post
Anti seize on the plugs.. wonder if some migrated down to the electrode...
I donít think so because weíve had the plugs in and out 3 times and they were cleaned each time
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Old 03-16-2019, 02:39 PM
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fuel pump driver module?
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Old 03-17-2019, 09:58 AM
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Originally Posted by KEVININCHICAGO View Post
fuel pump driver module?
why would this make #8 miss
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Old 03-17-2019, 11:40 AM
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Originally Posted by Wetfit View Post

why would this make #8 miss
Because of fuel pump cuts out for a split second, an injector or injectors lose pressure.

Might be neighboring cylinders, though. Compression test ALL cylinders to establish an accurate baseline.

What brand coil and timing parts, phasers, VCTs did you use?

Last edited by dukedkt442; 03-17-2019 at 11:42 AM.
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Old 03-17-2019, 12:44 PM
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Originally Posted by dukedkt442 View Post
Because of fuel pump cuts out for a split second, an injector or injectors lose pressure.

Might be neighboring cylinders, though. Compression test ALL cylinders to establish an accurate baseline.

What brand coil and timing parts, phasers, VCTs did you use?
Bosch and ford on everything
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