View Full Version : Check for error codes runs fuel pump?

06-10-2014, 06:53 AM
Hey guys,

Ive got a hesitation/poor performance problem with my car. Problem is when i check for error codes all that happens is it runs my fuel pump to every engine light flash? And the return line from the FPR is obviously moving fuel through it also.

I have an 92 RC engine and ecu, but when i change to a CS ecu which is slightly different i just get code 21? I dont want to use the other ecu because it wasnt designed for the RC but it drives noticably better on it??

Anyone have any ideas?