As title suggests my Sierra Cosworth is running rich under load as shown up on a dyno run tonight.
The afr is 14 on idle but drops to 9-10 under boost which is way too rich.
It's running a Motorsport developments stage 1 chip / actuator.
The ATS and CTS map and Amal sensors have all been changed and fuel pressure and boost are as they should be.
Any ideas much appreciated. I've also emailed Stu at Motorsport developments for advice as he is usually very helpful.
And before you say just take it to Motorsport developments I'm up in John O Groats so that's not really an option for me.
Cheers
Derek.