Maxon

I transfered a 5.0 into my 65 mustang and am having vacuum problems with my FPR. On cold starts if the fpr is hooked up to a main vacuum source off the back of the intake the car starts and then dies 2 seconds later when cold. When the vacuum line is taken off the fpr the car starts and idles fine. Any ideas?

other than that car is getting codes

81,82, 84,85 41,91

The 41 and 91 were never there untill i put my egr delete on.

symonds86

is it a stop fpr? chech where the vaccum line hooks on fior any trace of gas which would mean its leakingand not regulating right

Maxon

its a stock fpr, dont know what stop fpr is. no fuel and line is good

symonds86

meant stock my bad

Maxon

i figured so, all good.

Will leaving this unhooked have a terrible effect on my fuel pressure at higher rpms?