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Im back w/ more problems. When I stop it stops! wtf

Discussion in 'Stock 1991 - 1994 Explorers' started by SwaintaN, July 29, 2011.

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    1. SwaintaN

      SwaintaN Well-Known Member

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      So got a lot of things fixed and been driving fine. left it sit for about two weeks then decided time to clean it out for a field meet with friends, yeah, got to the stop sign, pressed break and it dropped to very low rpms to the point i had to hit gas/break to keep it running.
      does this in all gears but Park. sitting and rev, same thing when rev dies down, the ex tries to stop running.
       
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    3. Roadrunner777

      Roadrunner777 Well-Known Member

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    4. SwaintaN

      SwaintaN Well-Known Member

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      where would i start to check and with what tools?
       
    5. Roadrunner777

      Roadrunner777 Well-Known Member

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    6. ragajungle

      ragajungle Well-Known Member

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      Do you smell gas? is it "stumbling" then dying? If so it may be a Fuel Pressure Regulator Valve. A quick test is to locate the valve on the fuel rail (a chrome cylidrical valve with a vac line running out of the top of it into a vacuum tee on the intake plenum). Pull the line from it and if gasoline is in the line you need to replace the valve.
       
    7. SwaintaN

      SwaintaN Well-Known Member

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      i thought the fpr was inside the fuel pump assembly, if not where under the hood should i look
       
    8. Roadrunner777

      Roadrunner777 Well-Known Member

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      FPR is a diaphram looking device right behind the alternator.
       
    9. SwaintaN

      SwaintaN Well-Known Member

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      i found the fpr buried under the upper intake, which sucks, didnt realize you had to take off intake and fuel rail. i couldnt find the valve you suggested to pull off and check. it kind of comes and goes, i started it today and tried all the stuff i did yesterday, didnt do it, but i drove up to Gas Station to do more gas and pick up beer and sure shit enough it did it three times. i can get an fpr delphi for about 60 bucks, but then i gotta get o rings for the fuel injectors right? and gasket (or gasket)maker for the upper intake. im gonna stop out at Harbor Freight and see if they have a fuel pressure checker, and start there i guess will that tell me if the fpr is bad?
       
    10. Roadrunner777

      Roadrunner777 Well-Known Member

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      Right, to do any troubleshooting at this point, a pressure gauge is the tool.
       
    11. SwaintaN

      SwaintaN Well-Known Member

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      ok so my lovely wife is a serious hardcore couponer... soooo went to harbor freight got a fuel pressure checker w/ her 20% off coupon and free rope!
      any way results

      Key Off Engine Off
      0 psi
      Key ON Engine Off let fuel pump run cycle
      15 PSI
      Key On Engine Running
      15 PSI
      Engine Running High Rev from Idle
      15 psi

      sooooooooooo fpr?
       
    12. Roadrunner777

      Roadrunner777 Well-Known Member

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      Gotta love free rope!

      Yeah, 15 is a tad low. But, I think you are looking at the wrong part. Go to the point where you are measuring the pressure and then go forward about 3 inches. You should be seeing a stainless steel wrapped line. That line is connected to the top of the FPR, it's right there... that line goes into the top of it. Mainly the battle is rubber hoses. Go to a parts site and look at a picture of one, you will get the idea.
       
    13. SwaintaN

      SwaintaN Well-Known Member

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      ill go look again, i went by the Haynes manual on location and looked there, ill go look again and take a pic of what im looking at. so i guess my next thing is will changing the fpr change the pressure im getting or should i look at more stuff
       
    14. Roadrunner777

      Roadrunner777 Well-Known Member

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      The SS mesh line is the return to the tank. So, if you could block it somehow, and the pressure went up, then that would prove your FPR bad. The legit way is to find a cap that fits where the ss line is going on that elbow. A less legit way might be to pinch off the ss line gently and see if pressure goes up.
       
    15. SwaintaN

      SwaintaN Well-Known Member

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      Ok took a while, with kids and all... but i got the fpr off, nasty lil bugger had rust all over it etc, checked all the gas lines they werent pinched nor leaking so that is good. the fpr its self had no gas in it at all when i took it off, dumped it, blew air in etc, nothing notta no gas in it. i guess flip side is while its all taken apart ill paint the upper intake while im waiting on the part

      i have a part in ? that ill get pics of tomorrow... there was a hose hooked up to a weird lil t that the a/c had a line on, well now the line is empty because i eliminated the a/c ill take pics tomorrow... hopefully when i get the fpr on itll be good
       
    16. SwaintaN

      SwaintaN Well-Known Member

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      can i just use red rtv for the gasket maker? i cant seem to find just the gasket for the upper manifold. everyone wants to sell the set... i dont need the set.. more so cant really afford the set
       
    17. Xeek

      Xeek Elite Explorer

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    18. SwaintaN

      SwaintaN Well-Known Member

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      was just looking at that, trying to see if adv will have it, they are a lot closer, so i didnt order the fpr yet, but i saw Adv can get this one anyone heard about this one? direct fit?
       
    19. Xeek

      Xeek Elite Explorer

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    20. SwaintaN

      SwaintaN Well-Known Member

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      gasket or fpr? i read more about it, wouldnt work, order deplhi
       
    21. Xeek

      Xeek Elite Explorer

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      gasket in link. fpr from rockauto. get sealed power or standard motor products
       
    22. SwaintaN

      SwaintaN Well-Known Member

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      i got smp, going to get the seal and o rings for the fuel injectors, as soon as parts in hopefully itll run better, got some parts painted up to, trying to clean out the shed :rolleyes: as i told the wife, lol.
       
    23. SwaintaN

      SwaintaN Well-Known Member

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      i scrounged up to some money and got fuel injectors for it as well, so while its tore apart i can replace them, they are flow matched for even distribution, so between the fpr and fuel injectors, that should stop the problem?
       
    24. Xeek

      Xeek Elite Explorer

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      Glad you said flow matched. Good job. If they weren't I was gonna have to... ummmm... something with poptarts? Lol
       
    25. SwaintaN

      SwaintaN Well-Known Member

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      lol
       
    26. apolo607

      apolo607 New Member

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      fuel filter?

      How long that you last time replace your fuel filter?
       

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