e280 was running perfect prior to spray clean underneath and waxoyl applied- no engine not smooth, smokey and loss of power- ? Relay gone, any ideas appreciated?
Seems to be improved when car warm- not right though- smoke coming from mid exhaust, ? Silencer box- engine lumpy, not smooth- should have just left it dirty!! Any ideas? Fuel relay?
Update! Car is fine when cold and very smooth- when starts to warm up engine gets lumpy, loss of power- could it be fuel mix? relay?- Thanks in advance if you can help
S124 E300d wagon, W124 om606 monster, E46 v8 coupe
You've probably got water in the spark plug wells, the ecu will shutdown a cylinder with a constant misfire after a few minutes, hence the feeling of running on 4 cylinders when warm.