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  1. #1
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    Default She was purring along, tested some heavy braking, now she's struggling

    1993 Suburban http://www.gmtruckclub.com/forum/sho...-1994-Suburban

    Got her running nice. Just driving back from passing inspection (which really isn't saying too much)...on the highway, exit ramp...no one behind me, so thought it was a good time to test some heavy braking.

    Off ramp is down hill, slowed quickly from 60 mph. Didn't lock up brakes, but stopped pretty quickly. Decided the fluid needs changing pretty bad.

    As I roll through the intersection making a turn, I try accellerating, and she starts sputtering on me. I limp into the next parking lot and it dies on me.

    Get it towed home, replace TPS on a hunch with no luck. Also put the old IAC valve in with the same results, so put the new one back in.

    Any ideas? could something related to the heavy braking have caused this? brake fluid getting sucked up by the booster vacuum?

    thanks in advance for any tips.

  2. #2
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    How low was the fuel in the tank? because it sounds like you ran the pump dry on the hard corner.
    Mike

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    "Hold it to the floor till you see God.... Then Brake!!!!"

  3. #3
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    Default

    Tank is full, just filled it up w/ 40 gals fresh last week. Less than 10 or 15 miles on it, plus the idling/testing in the driveway. guage is still showing past full

  4. #4
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    And it wont restart?? Just asking i know you said it died... Otherwise you got me??

  5. #5
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    no prob...I appreciate your help!

    no it won't start unless I'm giving it gas while cranking...and it runs rough when I do that.

    when I let off the gas, it acts like it's trying, then finally dies.

    maybe in the hard braking, I stirred something up in the tank that got sucked up and foobar'd the fuel pump? The timing would be right...it is a full tank lol.

  6. #6

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    I'd start with checking fuel pressure, maybe the fuel pump decided to take a crap. When did you change the fuel filter last? Check your coil wire, mine fell of once on my '96 'burb at a stop light. Maybe, just maybe when you hit the brakes hard it was enough to slosh the fuel around and the fuel pump sucked up some dirt from the fuel tank bottom.

  7. #7
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    fuel filter is new...coil wire is snug (that's the one to the center of the cap right?)

    will see if I can get fuel pressure checked...and fuel pump will be next stab. thanks!

  8. #8
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    Something I noticed today messing around (haven't figured out how to test fuel pressure yet) is that there seems to be abnormally loud "sucking" coming from the throttle body. It may be normal, but hadn't noticed it before...

  9. #9
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    That is normal. however to test the pressure you remove the fuel filter, and test the IN side line.. You should have 12PSI.

  10. #10
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    I went to oreilly's and auto zone, and the only fuel pressure testers they had were either for cars w/ a valve on the lines to hook up to (which I don't think mine has), or one that you gotta T into, which I'm not comfortable doing...and it's after the filter anyway where I see to T into...

    is there anything in particular I need to ask for to get a "compatible" tester?

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