Hi Forum goers!
I'm hoping to get some help on an issue I am having with my RB20DET.
When it was on the dyno it was found that the car is running dangerously lean when on boost. The A/F mixtures are not smooth either.
I have recently had the fuel pump changed to a higher flowing unit and the fuel lines, injector rail, injectors have all been cleaned. The people who did the fuel pump said that it was running lean so checked the fuel pressure and found that the fuel pressure was ok. They also said they checked the main sensors and found them to be in working order.
On the dyno I was lucky enough to be able to borrow a chipped ECU (thanks!). This ECU improved the mixtures and smoothed them out but the car was still running very lean.
I'm hoping someone can help give me a few suggestions on what to try or what to change.
Any help appreciated.
Thanks for reading!
Will...