Sooty Plugs & Exhaust

[adecbr600]

Hi There

 

Galaxy 1996 2 ltr petrol

 

 

Can anybody shed any light on the following,have noticed that large patches of soot keep apearing on the drive from the exhaust pipe especially if you rev the engine,have just changed the plugs as well and these were also sooty (Not oily).

 

any ideas or does it need to be plugged in a computer to check sensors or engine management system.

 

Cheers

Ade :P

[teresa]

there can be a few causes for this problem these are as follows:-

 

1/ air/fuel mixture too rich

 

2/ choke stuck on

 

3/ electrical problem

 

4/ extended periods of low speed driving

 

5/ plug heat range too cold

 

this is only what ive read in my manual so correct me if im wrong!!!!