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After cleaning flame trap car is hard starting, loads-up rich & idles high ?? 200 1985

posted by  3 volvo guy on  Thu Apr 14 08:33 CST 2005
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last visit: Wed Mar 11 07:23 CST 2009
[RELATED]

Hello All,
Yesterday I cleaned/re-gaped the plugs, fixed two minor vacuum leaks and the car ran Great (as it always has)!

Today I clean out the flame trap (which was not very dirty) and now I have a whole new set of problems.

It is now Very hard to start, loads up on fuel and the idle has jumped from 800/900 to 1,100/1,200 RPM range in "park" or "Drive" position according to in-dash tachometer.
Moving from drive to park idle will momentarily jump to 1,700 amd then come back down to the 1,200 RPM range.

Trying to start without pressing the accelerator requires cranking for about 10 seconds. Then it starts but idles very rough, slow and obviously running very rich.
It then clears up, smoothes out and runs fine after revving it up a couple of times to clear out the rich condition.
It then runs fine but is still idling much higher than before cleaning out the flame trap.

I though I may have inadvertently disconnected an electrical connector or hose during the process but can't find anythig wrong.

Any ideas?

Thanks,
Dale

85 244, 80 242, 93 244







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    Another Symptom to add 200 1985

    posted by  3 volvo guy on  Thu Apr 14 11:51 CST 2005
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    last visit: Wed Mar 11 07:23 CST 2009
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    Shielding on the coolant temp sensor wire has flaked off after touching it.

    Wire is now completely bare but is registering the proper temperature on dash gage.

    What is the sensor just slightly to the right and down from the temp sensor?

    I have discovered that if I let it set for about 10 minutes it will start OK.
    But if I turn in off and try restarting immediately I get a no-go with the same original results.


    Found that if I let it set for about 10 minutes it will start OK.
    If I then turn it off and immediately try to restart I get the same original hard start and overly rich symptoms.

    I've checked and re-checked all hoses and wire connections.

    Shielding on the temp sensor wire has flaked off after disconnecting and re-connecting.
    It is now completely bare but is registering the proper temp at dash gage.

    Also... It has never ran rich before. Plugs are light colored and very clean.

    Btw, what is the sensor just right and down a little from the temp sensor?







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    After cleaning flame trap car is hard starting, loads-up rich & idles high ?? 200 1985

    posted by  someone claiming to be johnwr on  Thu Apr 14 09:22 CST 2005 [RELATED]

    Certainly you've checked the hoses three, maybe four times now. The connector for the coolant temp sensor is where I'd suspect a problem with brittle 1985 wires. Right next to the flame arrestor.








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      After cleaning flame trap car is hard starting, loads-up rich & idles high ?? 200 1985

      posted by  3 volvo guy on  Thu Apr 14 11:45 CST 2005
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
      last visit: Wed Mar 11 07:23 CST 2009
      [RELATED]

      Shielding on the coolant temp sensor wire has flaked off after touching it.

      Wire is now completely bare but is registering the proper temperature on dash gage.

      What is the sensor just slightly to the right and down from the temp sensor?

      I have discovered that if I let it set for about 10 minutes it will start OK.
      But if I turn in off and try restarting immediately I get a no-go with the same original results.







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        After cleaning flame trap car is hard starting, loads-up rich & idles high ?? 200 1985

        uid 27's pic
        posted by  Art Benstein on  Thu Apr 14 14:28 CST 2005
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        last visit: Fri Oct 17 20:10 CST 2014
        [RELATED]

        Dear Dale,

        The sensor with the single yellow wire is the temperature gauge sender; the one in the block just behind it is the knock sensor. The engine coolant temperature sensor is hidden behind the flame trap under the third intake runner; it has a two-wire connector on it. If the wires open up or crack off on that sensor, the fuel will dump in like it was January in the Yukon.
        --
        Art Benstein near Baltimore







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