fuel pressure regulator

[Willard]

Is there and easy way to test the fuel pressure regulator? I want to know if mine is bad before I spend the $$ on replacing it.

 

[BrooklynBay]

Connect a fuel pressure gauge to the fuel rail to test the pressure. # 33 in my list of useful threads has two links for more information.

 

[Opera House]

There really isn't a way to test them. The FPR can develop some very strange problems if they wear off center. I had strange problems that showed up on occasion for a year till I couldn't stand it anymore and bought a new FPR. Cut the old one open and found all the wear to one side on the seat.

 

[Willard]

thanks, and if i can't find anything else wrong, i'll replace the FPR. runs like crap and died on me twice, so this is a likely cause. either this or the fuel pump.

 

[Willard]

so if i can take take the vaccuum line off the FPR while it is running and there is no difference, is that a good indication that the FPR is bad?

 

[Willard]

anyone?

 

[MrShorty]

so if i can take take the vaccuum line off the FPR while it is running and there is no difference, is that a good indication that the FPR is bad?

No.

If you had a fuel pressure gauge on it, and removing the vacuum line didn't make a difference in the fuel pressure, that might say something.

As Opera House said, there are a few failure modes for the FPR that don't readily show up on a fuel pressure test, especially if they are intermittant or inconsistent. I would venture to say, though, that most failure modes of the FPR (if the FPR is really what's bad) will show up during a proper fuel pressure test.

 

[Willard]

thanks, i think i just figured out my problem and the FPR isn't it

 

[BrooklynBay]

So what did you discover was the problem?

 

[Willard]

i think i have a fouled spark plug from a previous EGR problem that is now fixed