Hello.

I have a wery wierd problem, when starting the car up cold, it idles fine. but after a couple of minutes the car starts going lean, making the afr read around 15-17. and it is also wery well noticable on the rpm¨s and the smothness.
If i go out for wot its normal. if i make a fullpull and then stop it idles fine again, but after a couple of minutes it starts to go worried. my fuel pressure is 42 psi at base, and it makes no differnce if i make the pressure higher.
I was at the tuner last week and tuned the car, problems started after that.

Please help me, my idees are empty now Best regards Nicko

 

...go back to the tuner???

 

you need to tweak your injector latency a bit to richen the mixture at idle it sounds like.