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Question for Volvo guru(s) 700 1987

posted by  someone claiming to be Sam on  Wed Jul 31 03:53 CST 2002 [RELATED]

The car runs fine for perhaps 30 min. After that, it starts to get
spikes in rpm speed, noticeably at idle. With foot off accelerator
it will often shut off. No, the idle is not too low. It’s around 800 rpm.
I suspect some electrical component is overheated. But, which one.
All of the “usual” suspects have been checked, or replaced.
All the hoses appear O.K. No signs of wiring problems.
Unless I can fix this, I’ll be looking far East for my next car…
By the way, car is 740T with B230 4 cyl.









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    Question for Volvo guru(s) 700 1987

    posted by  someone claiming to be JohnB on  Wed Jul 31 06:32 CST 2002 [RELATED]

    spikes in rpm at idle are almost surely the aic motor.

    shutting off with foot off accelerator is almost surely a dirty throttle body.

    Another problem with the 87 turbos was/is the wiring harness to the engine...if the wires to your injectors, grounds, other wires to coils are insulation-challenged (the plastic stuff is gone or flaking off and you can see copper wire strands) you most likely need to replace one or more of the engine harnesses.







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    Question for Volvo guru(s) 700 1987

    posted by  Bryan on  Wed Jul 31 05:41 CST 2002
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Tue May 4 00:53 CST 2010
    [RELATED]

    Clean your idle air control motor. The procedure is in the FAQ.
    --
    90 744ti, airbox, K/N, manual boost, VDO, modified exhaust.








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    Question for Volvo guru(s) 700 1987

    posted by  Don Foster on  Wed Jul 31 04:10 CST 2002
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Sun Oct 5 11:53 CST 2014
    [RELATED]

    While we wait for a genuine guru, I'll muddy the waters with drivel.

    "All of the 'usual' suspects have been checked, or replaced..."

    OK, so we won't talk about relays, sensors, switches, pumps, grounds, or connectors.

    And you'd like a list of the unusual suspects?
    --
    Don Foster (near Cape Cod, MA)








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      But You Are the Guru or Gurus! (nmi) 700 1987

      posted by  Token Ring Man on  Wed Jul 31 07:04 CST 2002
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

      nmi
      --
      Warren Bain - '86 744Ti M46 >290Kmi, '99 V70Glt > 45K mi, '96 965 >100Kmi Wifemobile near Manassas Va.. Check the 700/900 FAQ via the 'features' pull down menu.








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        But You Are the Guru or Gurus! (nmi) 700 1987

        posted by  Don Foster on  Wed Jul 31 07:13 CST 2002
        Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
        last visit: Sun Oct 5 11:53 CST 2014
        [RELATED]

        Fooled you, too, huh?

        Tell ya what. I got three bridges for sale. Small, medium, large. Send money, I send bridge. No need to resolder.
        --
        Don Foster (near Cape Cod, MA)







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