i had a similiar problem, my idle was dirty Throttle body i didnt beleive it till I cleaned it, and cleaned all the sensors in it. The fuel pressure I had the same thing, replace the fuel pressure regulator, one of my o-rings was bad causing it to loose the pressure, make sure all the orings are out from the old one and all the new ones are on, its easy for it to slip off.
Fuel pressure problems...please help
Ok, so I checked the fuel pressure this weekend. Here is what I found.
1. When I first plugged it in there was no pressure at all.
2. When I turned to key to the on spot so the pump would kick on it went up to a bit over 60 and started to bleed off slowly.
3. When I started the engine it jumped to just over 80 and while the engine was running rough it was jumping around like crazy.
4. Once the idle smoothed out it was pretty steady at 82 psi.
5. When I killed the engine it dropped down to 55 and started to bleed off right away. It was not bleeding real fast, but you could see the needle moving as it bled off.
6. Also, while it was bleeding I crimped off the return line at the tank and it still bled off just as fast as when it was not crimped off.
The problem I am having is that the idle is real rough right at startup for about 15 or 20 seconds then smooths out. Also after the truck is warmed up it has an extended crank cycle to get it started the second time.
Any ideas.
Thanks,
Chad
1. When I first plugged it in there was no pressure at all.
2. When I turned to key to the on spot so the pump would kick on it went up to a bit over 60 and started to bleed off slowly.
3. When I started the engine it jumped to just over 80 and while the engine was running rough it was jumping around like crazy.
4. Once the idle smoothed out it was pretty steady at 82 psi.
5. When I killed the engine it dropped down to 55 and started to bleed off right away. It was not bleeding real fast, but you could see the needle moving as it bled off.
6. Also, while it was bleeding I crimped off the return line at the tank and it still bled off just as fast as when it was not crimped off.
The problem I am having is that the idle is real rough right at startup for about 15 or 20 seconds then smooths out. Also after the truck is warmed up it has an extended crank cycle to get it started the second time.
Any ideas.
Thanks,
Chad
1 - 4 of 4 Posts
I was think the fuel pressure regulator was the problem and it may be easy for you NBS guys, but for us 96-98 guys we have to get inside the intake manifold to change it. Don't get me wrong, if thats the problem I am all over tearing into it, just not that easy to do you know.i had a similiar problem, my idle was dirty Throttle body i didnt beleive it till I cleaned it, and cleaned all the sensors in it. The fuel pressure I had the same thing, replace the fuel pressure regulator, one of my o-rings was bad causing it to loose the pressure, make sure all the orings are out from the old one and all the new ones are on, its easy for it to slip off.
Thanks for the reply.
Chad
1 - 4 of 4 Posts
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