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Hesitation / Power Loss 200 1990

posted by  someone claiming to be John G on  Sat Apr 30 03:02 CST 2005 [RELATED]

When running my 1990 wagon in town, about 30 MPH, perhaps accelerating slightly, there is occasionally a short hesitation, or sudden loss of power. My natural response is to depress the the accelerator hard, and it does not respond at all, just feels dead. This has only happened a few times to date, and the car has always recovered and never fully stalled, not yet. They other day it did this in a bad part of down, right in front of some gang looking dudes on the street. Thus, I am here to see if I can run the problem down before it leaves me stranded somewhere in indian country.








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    Hesitation / Power Loss 200 1990

    posted by  darmstrong on  Sat Apr 30 13:37 CST 2005
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Sat Sep 13 12:21 CST 2014
    [RELATED]

    If the problem happens coming off idle - either accelerating from a stop, or accelerating after coasting on the highway - I'd put your IAC valve high on the list of suspects. Cleaning my IAC cured this exact symptom. Have you cleaned your throttle body and IAC valve, and checked your throttle position switch function?

    --
    David Armstrong - '86 240(350k km?), '93 940T(270k km), '89 240(parts source for others) near Toronto








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    Hesitation / Power Loss 200 1990

    posted by  Joyca on  Sat Apr 30 07:14 CST 2005
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    Have you tried a good fuel pump relay? if the soldered joints are cracked they will fail under high heat load causing the fuel pumps to shut off intermitently. It's a white relay located under the carpet above the passengers feet. Search the archives/FAQ for fuel pump relay for plenty of info. New ones are ~$15 at fcpgroton.com

    Chris








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      Hesitation / Power Loss 200 1990

      posted by  Swedespeed240 on  Sat Apr 30 09:15 CST 2005
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      last visit: Tue Jun 26 10:13 CST 2012
      [RELATED]

      Hows you fuel Pressure? If you're regulator is bad, It will cause loss of power and possibly a complete stall during load.

      FCP has them for like $35-40, but it's just something to think about since I had a problem a lot like yours shortly after replacing fuel pump and filter (the problem is caused by excessively high fuel pressure wrecking or cracking the vacuum in the regulator which keeps fuel "optimally" pressurized)

      Spencer








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        Hesitation / Power Loss 200 1990

        posted by  someone claiming to be ZAL on  Sat Apr 30 09:21 CST 2005 [RELATED]

        I'm no expert, but my 93 did the same thing. My mechanic changed the CRANK ANGLE SENSOR and all was well.... except for the $100.00 !! Good Luck.







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