Start Up Question

[mgbond]

When I first start the car and leave it to idle for a bit, I get a soot mark on the ground under the exhaust outlet (GTO 2.5 exhaust points down under the car).

Once the car is warm or reved a bit it stops coming out. The car does run very rich so is it just extra un burned fuel?

Bondy

[saucyboy]

Bondy,

Mine was running rich due to a failed/lazy lambda and was quite sooty (Particularly after just starting up)Now its been changed there is no soot and getting better mpg.

James

[Humpy]

I had this but it seems to have cleared up now. Thought it might be something to do with the cat getting a bit gunked up..?

[mgbond]

I just called my mate as it did this on his drive (oops) and it just washed off.

I did put STP orange and black bottle (injector and something cleaner in yesterday) this may have added to the sooty part as it was cleaning the engine.

I wouldn't have thought it was the lamda sensor as I only have one and if that was playing up the car would run shite (I would have thought).

The sooner I get the new ECU the better it should be.

Thanks

Bondy

[Humpy]

mgbond said:

I did put STP orange and black bottle (injector and something cleaner in yesterday) this may have added to the sooty part as it was cleaning the engine.

[ecosnige]

Dude its a turbo car all turbo cars kick out soot on start up id really not worry every car ive had left sooty patch on garage door etc now me noble leaves one on the floor lol.Its totally normal