Recently removed 440cc injectors and reverted back to stock injectors. Everything on the car is stock except for the AEM fuel pressure regulator, 255 lph fuel pump, header and 3 inch exhaust.

I drove the car around for about 5 miles with no problems. Drove to school...about 5 more miles...got out of class and started driving home and I threw a check engine light. Any idea why?

 

You need to check to see what code it was...but why are you running that fuel pump, regulator and what did you need 440c injectors for????

 

Car was previously supercharged...didn't have stock injector clips for stock injectors. Engine code came back as running too rich or lean. I know I'm running too rich that's why my light came on.

Only part on car now is 255lph fuel pump, FPR, headers, exhaust...still have check engine light. Adjusted fuel pressure to about 32....What does the stock fuel pressure regulator pushes out? I need to know so that I can pass emissions.

 

your O2 sensor is probably fouled from the large injectors without management...take it off and clean it, or replace it. Stock idle fuel pressure on an itr is closer to 40 psig

 

Thank you!!! your information has been very helpful

 

no problem..did you figure it out?

 

adjusted fuel pressure to about 40psi and check engine light is still on...will clean o2 sensor when I get the chance. Thanks for the advice...car runs better at 40psi.