germanauto

I have a 1995 E320, I took the car to get the engine steam cleaned (top and bottom). The car was brought back to me and was hesitating and would turn off. I took the spark plugs out and water had gotten into the cylinders. I blew it out with pressurized air.

Now the car is fine on idle, but during driving and hard acceleration it hesitates very hard and sometimes dies.

Anyone have a similar problem with water getting into the engine? Please help

Bossman123

They most likely blew water up into your cold air intake(if you have one on a 95?) and got your MAF dirty. Under extreme pressure, the air filter will lift up in the filter box and allow unfiltered air to pass and directly hit the maf wires. Speaking form experience, one day with my leaf blower, I was cleaning my engine.......

ProV1

yes sounds like your MAF got messed up.

BENZBOSS

spark plug wires - had the same problem 3 months ago

vinceC

Are you saying that water somehow got inside the cylinders, on top of the pistons, into the combustion chambers? That could lead to "hydraulic lock" and destroy the engine. Furthermore, if the car was running when you got it back, any water that somehow got inside the cylinders would have been expelled as the engine ran. I think it is more likely that one or more of the spark plug connectors is damaged from water laying in the pocket around the spark plugs. There are two different types on the M104. One type is under the coils. The other type goes on the end of the short spark plug wires from the coils.

citruspilot

Actually, when you steam clean or water wash your engine you can get moisture into the holes where the plugs and coils sit. The plastic cover and coil act like a "steam cooker" so to speak and do not allow the moisture to escape. The water that gets trapped in those holes gets hot and turns to steam. It will short out the electrical impulse that goes to thru the coil and down the rubber boot into the spark plug thus causing hesitation and misfires. When the engine cools that same moisture trapped will turn back into water and next time you get your engine hot the process starts up all over again.

Solution, pull the covers off the coils. Pull each coil out and blow air into the holes. WEAR PROTECTIVE EYE GEAR. Make sure you have no water present then reinstall the coils and covers. This should solve your problem. I had this very problem late last year after I washed my E420's motor. My best friend, who is a master Lincoln/Mercury tech, said this is very common on most engines that use coils much like the ones that MB uses. We blew out the moisture from mine with his compressor and I had no more misses.

Be careful using water under pressure to wash your eninge.

Jeff