GBC78
Member
The car has began to operate poorly once again after I seemingly figured out the BISS screw adjustment and "seat - of - the - pants" tuning. For the life of me I can not replicate the past solution to the problem, now the GVR4 will only crank failing to start. The fuel pressure for the VR4 is a lowly 10 psi. My mechanic is firm on his belief that the fuel pump is at fault. However, the car has an aftermarket GM MAF that has not been tuned accordingly. I'm thinking that could be the cause for issue. Maybe the pumps played out, maybe not. I don't like the idea of betting on solutions, costly ones at that. Any information shared will be greatly appreciated. Thanks again.