Hello All,
I've been slowly but surely correcting a bunch of problems with my "new to me" A4. It has always ran but very poorly. To date I have done the following to help weed out some potential problems. 1) Electronic Ignition and spark plugs 2) New water pump and thermostat, 3) verified no exhaust blockages and rebuilt the hot-side of the exhaust.
I have always had trouble getting the engine to rev up under load {thus the exhaust work and water side work}
I finally got around to checking compression today after I got the engine warmed up a bit and have the following: #1{nearest flywheel} 100psi, #2 100psi, #3 0psi, #4 -0psi. My guess stuck valves on 3 and 4 so I poured in some MMO and will let it sit overnight. I'm not too thrilled about removing the head and subsequently valves etc if I don't need to. Are there any tests to verify stuck valves are the culprit here and not a gasket? I also have a feeling that running on 2 cylinders for this long has only added to the crud on the valves that are stuck if the spark plugs are any indication as they foul up almost instantly.
Hopefully solving this will get everything running right, it's only been 3 months...
I've been slowly but surely correcting a bunch of problems with my "new to me" A4. It has always ran but very poorly. To date I have done the following to help weed out some potential problems. 1) Electronic Ignition and spark plugs 2) New water pump and thermostat, 3) verified no exhaust blockages and rebuilt the hot-side of the exhaust.
I have always had trouble getting the engine to rev up under load {thus the exhaust work and water side work}
I finally got around to checking compression today after I got the engine warmed up a bit and have the following: #1{nearest flywheel} 100psi, #2 100psi, #3 0psi, #4 -0psi. My guess stuck valves on 3 and 4 so I poured in some MMO and will let it sit overnight. I'm not too thrilled about removing the head and subsequently valves etc if I don't need to. Are there any tests to verify stuck valves are the culprit here and not a gasket? I also have a feeling that running on 2 cylinders for this long has only added to the crud on the valves that are stuck if the spark plugs are any indication as they foul up almost instantly.
Hopefully solving this will get everything running right, it's only been 3 months...
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