MY C36 AMG 95' running problems

[c36hammertime]

lately had the car for a recent car wash, sprayed everything like engine bay.
then fair few hrs after after cleaning it drove it around and noticed my car shakes when at idle/stopped with the gear in 'D' and foot on brake. but then goes away if i select it in 'N'. then take off pretty fast but theres a different engine tone like as if its droaning and even theres no power.

But then i drive around for 30-40minutes, and i follow the same process as i mention, but then the shakes or vibrating of car, goes away. It also changes engine pitch like how it does normally sound, and the theres power.
and this problem has had happen a few times now since...

Please help my car's got a mind of it's own!!

 

[BlackC55]

I would say tou have go some water on the ignition coils or down the plug holes.

 

[c36hammertime]

i've serviced it today ..new spark plugs, new oil and filter/cartlidge..and add some engine flush and injector clean and all that..

after driving around it's normal but then the problem comes back again then repeats itself..but sometimes the problem wont happen at all.

 

[BlackC55]

Check the wiring loom to the coils. They can break up.

 

[bigasotonuk]

When changing the plugs you need to be careful in removing the coils as the wiring loom has a tendency to break up and short out, can cause ECU damage.

 

[eddiereilly]

i had that problem too a couple of weeks back , and i cleaned my maf and checked the plugs and leads , afterwards it seemed to have gone now i was diagionsed a misfire in pot 3 due to liquid after my bonnet was resprayed , so they must have jet washed my engine afterwards but its cool now

 

[c36hammertime]

thanks for the feedback