Rough idle
#1
Rough idle
Hi y'all,
My 2006 Mustang 4.0 recently stated idling rough and I got a check engine light. After pulling the code, I got Cylinder 4 misfire. So I immediately did a full tuneup; i replaced all plugs, wires, and coil pack, but no luck.
I then decided to pull the Intake manifold gasket, and I noticed that there are traces of coolant in once of the intake holes corresponding to cylinder 4. I immediately thought head gasket and decided to do a compression test. The results of the compression test was extremely satisfying with no problems.
I can't figure-out how the coolant is getting into cylinder 4 intake!!!??? The car is not overheating (Yet), there is no coolant in the oil ( I do see a small trace of mixture where the intake manifold hose connects to the valve cover).
Any ideias?
Thank you all.
My 2006 Mustang 4.0 recently stated idling rough and I got a check engine light. After pulling the code, I got Cylinder 4 misfire. So I immediately did a full tuneup; i replaced all plugs, wires, and coil pack, but no luck.
I then decided to pull the Intake manifold gasket, and I noticed that there are traces of coolant in once of the intake holes corresponding to cylinder 4. I immediately thought head gasket and decided to do a compression test. The results of the compression test was extremely satisfying with no problems.
I can't figure-out how the coolant is getting into cylinder 4 intake!!!??? The car is not overheating (Yet), there is no coolant in the oil ( I do see a small trace of mixture where the intake manifold hose connects to the valve cover).
Any ideias?
Thank you all.
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