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98 5.7 vortec fuel smell?

Discussion in 'General Chevy & GM Tech Questions' started by 98Z713dr, Dec 6, 2010.

  1. 98Z713dr

    98Z713dr New Member

    my 98 silverado with a 5.7 vortec has suddenly developed a fuel smell. i checked it all over the only place that appears to be leaking is where the metal lines go into the top of the intake manifold(the oval shaped area on top). could it possibly be the o-rings in the intake where the lines fit? if so how hard are they to replace or can they be replaced? the smell is pretty strong and i dont want to take my 5mo old and 2 yr old any where in the truck. any help or input would be greatly appreciated thanks a.j. indiana
  2. murdog94

    murdog94 Epic Member 5+ Years 5000 Posts

    The o rings should be simple, if that is the case but it sounds like the Fuel Pressure Regulator inside the intake is leaking. But you can try and seal the lines up and go from there, but if there isnt any raq fuel on the outside of the motor then 99% chance it is the FPR on the back side of the Spider injector.
  3. 98Z713dr

    98Z713dr New Member

    so then i will probably need to take the intake off and apart to properly fix it?
  4. murdog94

    murdog94 Epic Member 5+ Years 5000 Posts

    Just the Upper plastic intake yes.. there are a bunch of threads on how to change the FPR, and it really isnt a hard job just a little time consuming...
  5. 98Z713dr

    98Z713dr New Member

    would that be the cause of the my fuel pump running a long time after i shut the truck off. i noticed the other day it seemed to run for a long time after i turn the engine off.
  6. murdog94

    murdog94 Epic Member 5+ Years 5000 Posts

    Well depends on long time usually the pump will run for up to 5 seconds...
  7. 2COR517

    2COR517 Epic Member 5+ Years 1000 Posts

    The pump should shut off immediately when you shut off the truck.
  8. murdog94

    murdog94 Epic Member 5+ Years 5000 Posts

    On all of mine you hear it run for a few seconds... now it depends on how fast you are at getting out of the truck is wether or not you hear it.
  9. 98Z713dr

    98Z713dr New Member

    definately longer then 5 sec. i timed it to 15sec before it finally stopped running. a new fpr is about 60 from autozone. i will get one soon cause my gas mileage is seriously sucking right now due to what ever the problem may be.
  10. murdog94

    murdog94 Epic Member 5+ Years 5000 Posts

    Sounds for sure like you are leaking down and need a new one.. as i said just take your time and you will be good to go.. Let us know what all you find out.

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