4.0 Liter Problems

[Co-Man-Che]

In the name of science, we need to test it again and see what we get.

:awesomework: yes in the name of science. We should also record it somewhere.

Now I need to put new plugs in it and put all my old sensors back on because its idling a little rough.

 

[Co-Man-Che]

I finally remembered to test the fuel pressure with the replacement regulator. Running, the fuel pressure is at 35 psi. When the pump first turns on with the key the pressure goes to 40 psi then bleeds off quickly. With the bad regulator the pressure would go to 38 psi and stay there even when cranking.

 

[wazz]

I could be wrong, but I would believe more that you either let the water out of the fuel system when you changed the FP regulator.
Or allowed the fuel pump to run freed up enough to get back into its happy place.
I say that cause 2-3 PSI docent sound like enough to cause that much difference.

 

[Co-Man-Che]

I could be wrong, but I would believe more that you either let the water out of the fuel system when you changed the FP regulator.
Or allowed the fuel pump to run freed up enough to get back into its happy place.
I say that cause 2-3 PSI docent sound like enough to cause that much difference.

I'm very certain it wasn't water in the line. I do agree with you though, it seems logical that 2-3 psi wouldn't make it not run, but nevada had said the same thing about his Toyota not running if the pressure was 1-2 psi too low. I don't know? I'm just glad its running!

 

[wazz]

I'm very certain it wasn't water in the line. I do agree with you though, it seems logical that 2-3 psi wouldn't make it not run, but nevada had said the same thing about his Toyota not running if the pressure was 1-2 psi too low. I don't know? I'm just glad its running!

very good to hear it's going again,

Now you have this thread as a reminder and the tries to fix it.

I would be concerned about any long trips for at least the next tank of fuel, and see how it goes.
:awesomework:

Speaking from experience, these things have a tendency to fix them self's for a while outa the blue so thats why I say on something like this, be skeptical that it's totally fixed.

:redneck:

 

[wazz]

I forgot to ask did it not run again when you tried the old FP reg?

 

[Co-Man-Che]

I didn't try the old regulator. The truck started right away with the new one so I figured the old one was trash and that's where it went. I've already run a full tank through it without a problem, but with an old rig ya' never know what new problem is right around the corner.:cheer:

 

[wazz]

thanks again for your honesty toward the fix, it seems i don't always get that in forums/
I hope it stays fixed for you.:beer:

 

[NotMatt]

And you're certain that after messing with the removal of the charcoal canister... that the vacuum line was good and truly hooked up correctly to the FPR? Seems an oddly coincidental time for it to just "give up"... :redneck:

Shoulda kept the old FPR and tore it apart to see if the diaphraghm or spring inside were broken or screwed up somehow.

Time for 1-tons yet?

 

[Co-Man-Che]

And you're certain that after messing with the removal of the charcoal canister... that the vacuum line was good and truly hooked up correctly to the FPR? Seems an oddly coincidental time for it to just "give up"... :redneck:

Shoulda kept the old FPR and tore it apart to see if the diaphraghm or spring inside were broken or screwed up somehow.

Time for 1-tons yet?

I checked the connection to the FPR a couple of times, even before I figured out that the FPR was the problem. I'd agree it was very coincidental, but quite convenient for me. I must be living right or something to have this thing die in the shop instead of out in wheeler canyon, in the single digit temperatures.

"Time for 1-tons?" Oh yeah, long overdue. Just dong my homework on it first. Mike suggested that I just go swipe your 60.:flipoff: