Fuel pressure regulator problem?
Has anybody had a problem of their fuel pressure regulator sticking? I think mine is sticking, or at least slow.
I noticed one day that my fuel pump (which is between the seats under the console on a Fiero, therefore easy to hear), was 2X louder than normal when I pulled into the A&W, I turned the engine off, then turned the ignition back on, and the pump was still noisy. I went in, had a burger, and when I came back out, it was still noisy. It drove fine and everything, but I noticed that the pump didnt change note like it usually does. Usually the pump goes quiet on deceleration, and gets louder as load increases which is normal from what I know, but this time it was the same noise, didnt get louder or quieter even while decelerating from 4000RPM in gear. I parked it, and the next day, the pump was quiet again, but I only drove it around the block to park infront of my house, that was 6 days ago. I drove it again today, and it worked fine, but I did notice that it takes awhile for the pump to go quiet after I let my foot off the gas when in gear, and again takes awhile to get noisy when I accelerate from a decel mode, by awhile, I mean like 5 seconds.
Is this normal, or is my fuel pressure regulator sticking? I assumed the fuel pump was noisy that one day because the regulator was stuck in a position that made my pump put out max pressure. No fuel comes out of the vac hole, but when I was sucking on the vac port on the regulator with the engine off, it did smell alittle like fuel.
I am going to replace it with another one I have laying around. Oh BTW, I have the newer style regulator with the vac port coming out the top, not the side.
1986 Pontiac Fiero 2M4, with a 1991 Quad 4 HO/5-speed engine.