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Cold Start Injector -- Yes or No 1987

posted by  dan52 on  Mon Jan 24 11:35 CST 2005
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The Car in question is '87 740 NA and is located 1,200 Miles from home.

My daughter reports that the car must be cranked multiple times to start in cold weather (Boston). e.g. crank 5 seconds, wait 10 seconds, repeat three times and will finally start and run fine. I reviewed the FAQ and it seems other reports of hard starting cold involve a rough idle. This is not the case in this instance.

I don't know the ecu model number, but I believe it is one of the LH 2.2 versions - no diagnostic port. My first guess is a faulty Cold Start Injector, but I can't even remember if this car is so equipped. Anyone have any suggestions beyond the obligatory reference to the degrading wire harness?

Is this behavior "common" in the cold climates with winterized gasoline?

Thanks,

Dan








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    Cold Start Injector -- Yes or No 1987

    posted by  darmstrong on  Mon Jan 24 12:14 CST 2005
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    last visit: Sat Sep 13 12:21 CST 2014
    [RELATED]

    According to Bentley, cold start injector started with LH2.4 in 1989.

    I have a similar problem, and haven't yet resolved it. ECT is the first thing to check; there's resistance and voltage specs for it in the FAQ for various temperatures.

    Another item high on the list would be vacuum leaks; extra air that the AMM doesn't know about means leaner than expected fuel mixtures, which are bad news for cold starts.

    I would imagine that injector spray pattern might be more of an issue in colder temps. My guess would be that most other things would have a similar effect at warmer temperatures also, but I suppose that all things being equal, lower temperatures make combustion more difficult in general.
    --
    David Armstrong - '86 240(350k km?), '93 940T(270k km), '89 240(parts source for others) near








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      Cold Start Injector -- Yes or No 1987

      posted by  dan52 on  Mon Jan 24 12:34 CST 2005
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      David thanks for the feedback. I failed miserably in passing along any mechanical genes to any of my children. It isn't likely she is going to be much help in diagnosing this problem. I'll try to walk her through the vacuum hose leak check.

      Sample dialog:
      Dad "Look at the hoses connected to the intake manifold."
      Daughter: "Intake what?"
      ...
      ...

      Thanks again.

      Dan







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    Cold Start Injector -- Yes or No 1987

    posted by  Aye Roll on  Mon Jan 24 11:56 CST 2005
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    last visit: Tue Oct 14 21:08 CST 2014
    [RELATED]

    You don't have a cold-start injector. Just the 4 main ones.

    Hard starts are more likely due to a bad fuel pump check valve on the main fuel pump, or possibly a dying Air Mass Meter (AMM).

    A check valve you'd get new- they're not expensive. The AMM is often OK as a used part- check Ebay or try an independent shop or junkyard. Your car takes the "007" model for LH 2.2.
    --
    Rob Bareiss, New London CT ::: Roterande Fläkt Och Drivremmar!








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      Cold Start Injector -- Yes or No 1987

      posted by  dan52 on  Mon Jan 24 12:26 CST 2005
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      Rob, thanks for the great info. Do you know if the LH 2.2 Primes the pump on start up? I think I will suggest that she turn the key on to position II for a few seconds and back off two or three times before cranking as a diagnostic test.

      I believe I have an "007" amm in the garage. Maybe I'll send it to her just in case.

      Thanks again,

      Dan.







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        Cold Start Injector -- Yes or No 1987

        uid 18083's pic
        posted by  lucid on  Tue Jan 25 06:40 CST 2005
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        last visit: Fri Oct 24 12:31 CST 2014
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        Dan,

        Sorry to say the LH 2.2 doesn't "prime" with Key ON like the 2.4 (and some Kjets, depending on the FI relay installed).

        You could do it with a jumper between fuses 4 and 6, but that would be a lot to ask of the daughter.

        Bruce
        --
        Bruce Young
        '93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.








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          Cold Start Injector -- Yes or No 1987

          posted by  dan52 on  Wed Jan 26 08:39 CST 2005
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          Bruce,
          Thanks for the reply. Unforunately, I have to agree with your statement that I am better off not asking her to try the jumper. Oh well! I better be good to her, she is the one who is going to have to support me in my old age.

          Dan







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        Cold Start Injector -- Yes or No 1987

        posted by  NavalGunner1125 on  Mon Jan 24 12:50 CST 2005
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        last visit: Mon May 19 15:30 CST 2014
        [RELATED]

        I am having similar issues with my '87 B230FT but mine wasn't starting at all. I am in NH and this BS started last Wednesday when the temp dropped to about -20. Since then, there has been an outbreak of similar problems - all have been happening since the mercury dropped last week.

        She may have a semi flooded engine need to take it our for a deep breathe, I overlooked the known flooding issue with my 740 and it's taken me 5 days to come to the conclusion that it's flat out flooded. A friend of mine in Concord, NH runs a Volvo only repair shop, I talked to him today and followed his instructions and hints about a flooding issue and my car actually started. She may be having the same issue.
        --
        Rich George








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          Cold Start Injector -- Yes or No 1987

          posted by  darmstrong on  Mon Jan 24 18:08 CST 2005
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          last visit: Sat Sep 13 12:21 CST 2014
          [RELATED]

          What were his hints about a flooding issue; I'd like to try them.
          --
          David Armstrong - '86 240(350k km?), '93 940T(270k km), '89 240(parts source for others) near








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            Cold Start Injector -- Yes or No 1987

            posted by  NavalGunner1125 on  Tue Jan 25 04:56 CST 2005
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            last visit: Mon May 19 15:30 CST 2014
            [RELATED]

            Dave,

            1) Disconnect the coil wire from the distributor to prevent any more gas being sent into the cylinders.

            2) Pull out the spark plugs

            3) Either use a hair dryer or other source to heat and dry the plugs off. You can use a can of either to douche out the plugs before you dry out and blow off the plugs. If you can blow the plugs off using LP air after you douche them out, do it. Then use the hair dryer treament on the plugs to really dry them off, you don't have to roast the plugs, just blow on each one for about 1 minute or os, that's plenty to dry them off.

            4) While the plugs are out of the car and the coil wire disonnected, crank the piss out of the engine on and off for about 5 minutes, don't hose your battery, just crank the heck out of it while the plugs are out. This rids the cylinders of any residual fuel, just MAKE sure you have the coil wire disonnected otherwise, you'll be defeating the whole purpose.

            5) reinstall the plugs and fire it up, it might run and sputter if there is a shitload of fuel left in the cylinders, it may run fine. If it runs at all then dies, then you know you have a very badly flooded engine (like mine).

            Try it, don't discount this suggestion, I wish someone gave me something like this a week ago, I'd be up and running by now.

            Let me know how it goes.

            --
            Rich George







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