Engine Performance problem
1994 Chrysler LHS 6 cyl Front Wheel Drive Automatic 200000 miles
Slighly rough, rythmic idle. If I pull injector connector off cyl 5 no change. If I pull it off of any other cylinder it gets worse. Prior to this I replaced the air filter, all spark plugs, all spark plug wires. Ran 2 tanks premium fuel with inj cleaner thru it. Cleaned the idle air control motor (new style). Spark looks good on all cylinders. No stumble or miss off-idle. No check engine codes.
I tried spraying some carb cleaner around cyl 5 intake manifold but no change. Maybe not enough. Did compression test tonight. All cylinders good at around 160 psi. When I pulled the slightly new plugs (100 kms) to do compression test they all looked pretty much the same.
I suspect the cyl 5 intake gasket but need more proof. Acceleration and gas mileage are still good. Any ideas? I've heard ether or propane.
have the same problem?
Friday, April 24th, 2009 AT 2:22 AM