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need for speed 200 1993

posted by  someone claiming to be Poorgie on  Thu Apr 28 05:46 CST 2016 [RELATED]

I have been trying (unsuccessfully) to sort out engine running problems in my 93 240. The car always starts fine but begins to shutter and eventually die out after it warms up. It has good compression, I have cleaned the throttle body, changed the AMM and oxygen sensor, replaced ignition components such as plugs cap wires ect..., I have also removed cleaned and checked the function of the two temp sensors located on the left side of the engine. There is no check engine light on, but when I ran the diagnostic procedure I get two codes 1-2-1 (fault in signal for AMM, and 3-1-1 (vehicle speed signal missing). What does this mean???








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    Speaking of a need for speed... 200 1993

    uid 27's pic
    posted by  Art Benstein on  Fri Apr 29 08:55 CST 2016
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    last visit: Fri Oct 17 20:10 CST 2014
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    Have you driven this car? Does the speed-o-meter work when you can drive it?
    --
    Art Benstein near Baltimore

    "The more people I meet, the more I like my dog." -Ivan Pavlov








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    need for speed 200 1993

    posted by  Chris Mullet on  Thu Apr 28 16:05 CST 2016
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    last visit: Fri Oct 24 09:08 CST 2014
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    Have you tried another coil? They sometimes have a way of working pretty well when cold, but start to falter more and more as they get warmer and warmer. If you connect a timing light to either one of the spark plugs or the hot lead from the coil to distributor, a coil failure will show quite obviously.
    --
    Current rides: 2005 Volvo S80 2.5T, 2003 Volvo V70 2.4NA, 1973 Volvo 1800ES (getting ever closer to road worthiness)








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    need for speed 200 1993

    posted by  jwalker on  Thu Apr 28 10:31 CST 2016
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    Long shot - Make sure your AMM plug is inserted correctly and none of the prongs are broken, bent or damaged. I put a little dab of dielectric grease in mine to (hopefully!) improve conductivity.

    It wouldn't hurt to double check the oxygen sensor connection too.








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    need for speed 200 1993

    posted by  machine man on  Thu Apr 28 10:04 CST 2016
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    last visit: Wed Oct 22 15:40 CST 2014
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    How about the crank position sensor they cause variations of the way an engine will run while it's running. Temperature changes effect the windings inside it.

    You said you checked sensors on the left side of the engine which makes a lot of sense to do.
    The CPS is behind the engines head and in the tight spot in front of the firewall.

    It there is a frayed sheath it is a clue to how old it is.
    Clean the connector pins and use some dielectric paste. If the problem is better or worse buy a new CPS.

    Edit: How does it drive?
    The ECU codes point in two directions but vehicle speed is a speedometer related issue that affects idle.
    The AMM code could be a pin hole air leak in the accordion hose behind it.

    Phil







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