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WOT bogging, thought it could be fuel pump???

Posted by tylercuevas93, Oct 4, 2013

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  1. tylercuevas93

    tylercuevas93 Probationary Member

    Joined Oct 19, 2012
    Valparaiso, Indiana
    Looked over some of the threads on here, kind of in a hurry to get this fixed as it's my daily and it has been out of commission for over a week now : /. Quick summary of what happened. It had been raining a lot, and I have a gst spyder, with a not so forgiving top to the rain, rain got in and what I believe had happened was shorted something out, battery died out mid way of putting top up but still could get windows up and dash still worked somehow. Got the car to my house, barley after the car was bucking and battery wasn't holding power. Checked volts on my battery and my alt. was fried, new one is installed, the car now runs again. Start the car up and it has a very bad idle for about 10 mins, idle between 500-900, after about 10 mins, it idles right at about 1100 rpms (ecu set to 900 target). Thinking it could possibly be a fuel pump but not 100% sure as it runs now, but when I step on the gas the engine sounds like its getting ready to go, but boggs out. Read it could be rings, and was wondering where I could get a compression test done? At any local shop? Running all stock fuel components, turbo besides a couple bolt-on's. Any help would be greatly appreciated! Sorry for any re-post, as I said before I am just in a hurry to get my baby fixed!! Thanks again everyone!
  2. AKfrankenstein

    AKfrankenstein Proven Member

    Joined Jun 29, 2013
    Anchorage, Alaska
    You can go anywhere to get a compression test or you could do it yourself. Most parts store rent tools
  3. evoredy

    evoredy Proven Member

    Joined Apr 21, 2009
    Killeen, Texas
    Seems like you have access to some logging software and a tactrix as you stated that you have set the target idle.

    I would log all the sensors to include the TPS and MAF while monitoring everything else with the engine off and then on. Do you have a wideband? If not, you could look at the short term fuel trims and see if the ECU is dumping fuel at idle and under 2K RPM to account for a failing pump on your first hypothesis.

    Check the plugs, coils, etc. and do a good visual inspection. Seems like an external issue but good luck. A compression test is a quick and easy thing as you can check the plugs while you do that.

    3K  0

    1998 Mitsubishi Eclipse GSX
    12.072 @ 127.880 · 2G DSM
  4. iugrad92turbo

    iugrad92turbo Supporting Member

    Joined May 22, 2007
    Kalamazoo, Michigan
    Your fuel pump could be bad, clogged filter, or dirty injectors.

    8K  5

    1992 Eagle Talon TSi
    awd · manual · 1G DSM

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