Hi
My m8's car has developed a problem while its been off the road having some body work done
Have tried a new map sensor on it and checked the resistance of the blue temp sensor
Injectors have been flow tested/cleaned.
The car is over fueling like mad on idle sometimes,then other times its ok at 3% Co,also its running lean when on boost,we checked the plugs after a blast and they were white
Smoking a lot on the over run,grey/black smoke,but idles lovely and running fine

Any ideas please,thinking it could be ECU,anyone had probs like this before???????
Also can welding on a car damage the ECU???????

Thanks

 

Sounds like map sensor try blowing pipe out to it if this has water in it can cause over fueling

Just an idea

 

yes it can! but if the welding was done by a respectable garage they would have disconnected the battery or put a surge protector across the battery befor they started to weld.

 

Thanks

Have tried a new MAP sensor

Could be the welding then,perhaps the bodyshop forgot to disconnect the battery at some time,had alot of welding on it,new arches/sills etc