K series idles rich ........HELP.

[carphotographer]

'96 K series 1.6 Supersport engine - idles rich
Have a '96 K series 1.6 Supersport that appears to run rich at idle The engine runs an original ECU, but has a head by Minister Racing - different cams, gas flowed head, uprated gasket and verniers.

On the move it seems to be okay but when at idle it seems to be running rich. Spark plugs get sooted up quickly but are dry.

Any ideas.....

[radical78]

worn injectors . blocked air filter . cam timing

[carphotographer]

Thanks for the answers,
Timing has been mentioned by a few people but surely if the timing was out at idle it would be out throughout the rev range :-/

[carphotographer]

11. days later since posting and it's still not fixed

[JRA]

Try replacing the water temperature sender as this tells the ECU what mixture the engine needs according to its running temperature. Its the one with 2 wires as the other one is for the temp gauge

[BertBert]

carphotographer said:

The engine runs an original ECU, but has a head by Minister Racing - different cams, gas flowed head, uprated gasket and verniers.

I suspect that this ^^^ is the answer.

[carphotographer]

ran okay for 15 years with this set up :-/