I getting a SES code saying misfire on cylinder 3.
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I have tried swapping sparkplug wires, sparkplugs, coils and fuel injectors and the misfire never moved. The motor shakes when idling. Also you can hear it missing. Any ideas where to go next? The car has about 183k miles.
Thanks
Thanks
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The code is telling you that #3 cylinder isn't making the power it should. You've eliminated fuel delivery although a possible problem could be in the wiring harness to the injector. It could also be a valvetrain issue or as Will is asking, an issue with head or LIM gaskets.
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I just did a compression test and all the cylinders ranged from 145 to 165 except for cylinder 3 which was 132.
I did a leak down test and all the cylinders ranged about 87 to 94% except for cylinder 3 it was 54%. So I do have a problem with that cylinder. I was hoping that maybe that valve needs to be adjusted. When listening I hear the air out the exhaust so I would assume that is the leaking valve. As for adjusting the valve just to double check do I go to TDC than torque to 11lbs and turn an additional 90 degrees?
I did a leak down test and all the cylinders ranged about 87 to 94% except for cylinder 3 it was 54%. So I do have a problem with that cylinder. I was hoping that maybe that valve needs to be adjusted. When listening I hear the air out the exhaust so I would assume that is the leaking valve. As for adjusting the valve just to double check do I go to TDC than torque to 11lbs and turn an additional 90 degrees?
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Originally Posted by Jrios
I just removed the rockers and the leak down test did not get any better.
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Originally Posted by Rogue
Originally Posted by Jrios
I just removed the rockers and the leak down test did not get any better.
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Originally Posted by Jrios
Well it looks like a bend push rod. ![Crying or Very sad](https://www.gmforum.com/gm/images/smilies/icon_cry.gif)
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