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Check Engine Light and occasional stall 700 1989

posted by  kcady on  Tue Dec 30 06:08 CST 2003
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last visit: Fri Jun 13 08:49 CST 2008
[RELATED]

My problems started a couple of years ago when to make a long story short I have the following work done at a dealer:

New knockdown cable on Transmission
Throtle body cleaned
Oil trap cleaned / replaced
Mass Air Flow sensor replaced.

Since then I have started having the problem of the Check Engine Light coming on. After taking it to a garage with code-reading ability they advise that it is the MAF code but checked out the new part and it is funcitoning fine. Suggested that maybe the problem is the in-tank fuel pump which I replaced. Still the problem persists that on occasion the light comes on and the car hesistates when driven on the road but generally 'get's through it' however if at idle when this occurs the car stalls. The car will not immediately re-start but does after 1-2 minutes and then runs fine until the next occurance.

PLEASE and help would be appreciated! What could cause this code? Fuel delivery problem? Any like problems encountered?

Keith Cady








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    Check Engine Light and occasional stall 700 1989

    uid 18083's pic
    posted by  lucid on  Wed Dec 31 06:00 CST 2003
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    last visit: Fri Oct 24 12:31 CST 2014
    [RELATED]

    Kieth,

    You can access and read the On Board Diagnostic (OBD) codes yourself. The procedure and code definitions are in the 700/900 FAQ "Feature".

    I think '89 was the 1st year for the "RPM" (aka "Impulse") Sender, which if yours is the original one, is a likely suspect.

    The sensor is less than $30 at FCP Groton, and not too hard to change (10 minutes or less, if the hold-down bolt and sensor body free up with no problems).

    It's at the top of the transmission bell housing, at the rear of the engine. It poins down to sense magnetic pulses from the flywheel/flexplate. When you can see it, you can't touch it, and vice-versa.

    If it misses intermitently (as many posts here attest), you'll lose Ignition, which in turn kills Fuel Injection, till the pulses resume.

    Hope this helps,

    Bruce
    --
    Bruce Young,
    '93 940-NA (current)
    '80 GLE V8 (Sold 5/03)
    '83 Turbo 245
    '76 244 (lasted only 255,000 miles)
    73 142 (98K)
    '71 144 (track modified--crusher bound)
    New 144 from '67 to '78
    Used '62 122 from '63 to '67








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      Check Engine Light and occasional stall 700 1989

      posted by  kcady on  Sat Jan 24 03:35 CST 2004
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
      last visit: Fri Jun 13 08:49 CST 2008
      [RELATED]

      Thanks for your help. I can't praise this site enough. This problem was worrying me sick and all it turned out to be was a dirty connection at the AMM. I sprayed the connector (male and female sides) with electronic parts cleaner and the deal was done! No problems since!

      Keith







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