fuel pressure regulator replacement - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Boog** · 11-13-2010, 05:01 PM

2000 GMC 5.3
hard starts

In a previous thread we talked about hard starts and fuel pressures. A checkvalve in the pump was thought to be bad requiring a complete fuel pump assembly replacement.
I've been waiting to see how that turned out but hasn't yet. So today I took a look at mine. It's been hard to start at times for a month or so. Touch the key and it'll start right up some times and spin over and over then start smelling flooded other times.
With the engine off I pulled the vacumn line off the fuel pressure regulator and gas ran out of it. That's not right.
So I replaced the regulator. A 5 minute job. A twist of the key and it busts off like new now. Idles better too.
Be sure to pull that small oring out of there or the new regulator won't go in. I'm pointing to it in the 4th pic.
So mine turned out to be the regulator instead of the checkvalve in the fuel pump unit being the culprit. $45 instead of $300 for a pump.

63 & 64 Bowties · 12-01-2010, 08:53 AM

Good info. Thanks for that write-up

11-13-2010, 05:01 PM	#1
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 12,974	fuel pressure regulator replacement 2000 GMC 5.3 hard starts In a previous thread we talked about hard starts and fuel pressures. A checkvalve in the pump was thought to be bad requiring a complete fuel pump assembly replacement. I've been waiting to see how that turned out but hasn't yet. So today I took a look at mine. It's been hard to start at times for a month or so. Touch the key and it'll start right up some times and spin over and over then start smelling flooded other times. With the engine off I pulled the vacumn line off the fuel pressure regulator and gas ran out of it. That's not right. So I replaced the regulator. A 5 minute job. A twist of the key and it busts off like new now. Idles better too. Be sure to pull that small oring out of there or the new regulator won't go in. I'm pointing to it in the 4th pic. So mine turned out to be the regulator instead of the checkvalve in the fuel pump unit being the culprit. $45 instead of $300 for a pump. Attached Images __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross Last edited by Boog; 11-13-2010 at 05:18 PM.

12-01-2010, 08:53 AM	#2
63 & 64 Bowties and a few others Join Date: Jun 2007 Location: Blue Ridge Mountains of VA Posts: 5,638	Re: fuel pressure regulator replacement Good info. Thanks for that write-up __________________ Bill US Army Vet -193rd Infantry BlueRidgeMuscleCars.com “The greatness of a nation and its moral progress can be judged by the way its animals are treated” Gandhi



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