Fuel Pressure Regulator keeps failing

[Made in USA]

I'm on my 4th one now. Any ideas why?

I've discussed with Marc H and he has never heard of this problem. When it fails, it leaks fuel back through the vacuum line, into the plenum, and all over the floor.

I'm changing the vapor canister just because, and I also put a new gas cap on.

[weldbead]

wondering if you know how this regulator works?i had a different style on my '91 L98..no vacuum..i swapped it out for an adjustable on from midamerica..c4koh noticed that the vac line on mine had come off, i didnt notice much difference when i put it back in place..of course i think i have a large secondary vacuum leak which may be affecting fuel pressure regulator..

[LGAFF]

What fuel are you running and anything you are putting in it?

[LGAFF]

Wonder if your return line is blocked causing high pressure???

[Made in USA]

Originally Posted by LGAFF

What fuel are you running and anything you are putting in it?

I use Conoco 91 octane exclusively. Almost any other fuel and it will ping. I don't use any other additives.

[Made in USA]

Originally Posted by LGAFF

Wonder if your return line is blocked causing high pressure???

I was wondering about that too. Is the return line a direct shot back to the tank ?

[LGAFF]

Wonder if the canister is pushing gas into the intake and not the regulator

[ZZZZZR1]

I'd wonder if it has anything to do with the fuel rail?

Is that connection not tight enough?



David

[LGAFF]

When you put a fuel gauge on the rail does it hold pressure or bleed off? Ever test Fuel Pressure under load??

[LGAFF]

https://www.youtube.com/watch?v=AKtR_yF7bi8