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Success! 850

posted by  someone claiming to be Patulous on  Wed Feb 18 11:32 CST 2004 [RELATED]

I posted a message a while ago looking for advice because my 850 wouldn't start. I changed the spark plugs, fuel relay and fuel filter (which was very clogged). Still wouldn't start until I finally followed the simplest advice I had received: clamp down on the rubber hose from the IAC to the intake manifold, and it worked! Thank you all who provided any bit of advice as it was all crucial to this triumph.

Sadly, my woes don't end here. As I was taking a victory lap around the neighborhood, I noticed another problem which I have encountered before: the car wont really "go" when the RPM are low. Could this problem also be attached to the IAC? Has anyone had a similar problem? Any comments are so much appreciated. Thanks!








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    Success! 850

    posted by  someone claiming to be Patulous on  Thu Feb 26 21:08 CST 2004 [RELATED]

    For the days and nights since my last post, my lovely 850 has started every time I've tried, and it has taken me to and from every destination. At first it seemed very tired and reluctant. The gas pedal didn't do very much at low rpm's. Now she wants to "go" a little more than before, but still the same problem. I'm less convinced its the 02 sensors, maybe the timing, fuel pressure regulator or even knock sensor. We'll see. So little $$, so much to repair.








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    Success! 850

    posted by  SUNSCIRCUS on  Wed Feb 18 23:55 CST 2004
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Fri Jan 29 03:20 CST 2010
    [RELATED]

    I dont understand this advice: " clamp down on the rubber hose from the IAC to the intake manifold" IAC is the Idle Control Motor Valve ?

    Could you explain? Thanks








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      Success! 850

      posted by  someone claiming to be Patulous on  Thu Feb 19 09:56 CST 2004 [RELATED]

      If the valve is stuck open, too much air is getting into the manifold. About the problem... My next steps are 1) replace flame trap, as I've heard this should be done quite often anyway, and 2) replace 02 sensors. I have a hunch the latter will be very nice to me. I'll update about the ongoing process.








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        Success! 850

        posted by  someone claiming to be Ontheball! on  Sat Feb 21 01:51 CST 2004 [RELATED]

        Don't you just love it when tough things become easy things??

        You might need to clear the codes or disconnect the battery to re-set the computer adaptives for a couple of hours.

        Should deal with the sluggish feeling.
        Matt








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          Soooooo Frustrated... 850 1994

          posted by  someone claiming to be Patulous on  Mon Feb 23 15:04 CST 2004 [RELATED]

          I disconnected the battery and left it that way for a few days so I could get a new flame trap assembly and install it while the IAC was removed. Just finished that installation, cleaned connecters on MAF, IAC and flushed IAC with carb cleaner.

          All ready to go, I connected negative battery cable and started car. Started right away. I didn't want to get stuck away from my house so I let the car sit running while I lowered the jack and put away my tools. Tested the accelerator while in park and there is 1-2 second hesitation when pedel first depressed, then rpm's rise as normal. This hesitation is similar to what happened when I drove it the last time.

          Then, after about 3 minutes, the car just died as it did before. Wouldn't restart, just turned over a gazillion times but no start. I could hear the fuel pump "working" behind me, the carpet and trim are all pulled and the FP cover is off.

          I was so frustrated I accidently removed the negative battery cable before removing keys from the ignition. I don't know if this is really bad, but when I did it I heard a sound similar to what you might hear if someone who has been holding their breath for a few minutes finally lets it out.

          I then shut the hood, locked the doors, and resisted the urge to fill the cabin and gas tank with dynamite. I need a beer, and lots and lots of help. I don't have much money so I want to do as much as I can on the cheap before I take it to a shop for diagnosis. I love my baby so, and it kills me to hate her this the way I do.

          So far I have:
          changed fuel pump relay
          changed spark plugs
          changed fuel filter
          changed flame trap
          cleaned connecters for IAC and MAF
          cleaned inside IAC


          Thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you thank you!

          (sorry such a long post)








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            Addendum 850 1994

            posted by  someone claiming to be Patulous on  Mon Feb 23 19:51 CST 2004 [RELATED]

            I disconnected the battery again after it wouldn't start and it started again. This leads me to believe the fault has to do with codes. I haven't had the opportunity to check the codes yet so I guess that's the next step. I check brickboard often and appreciate not only the responses to my own posts, but also the posts of others as it has proven to be invaluable in the understanding of my volvo. I love my volvo even when others mock my dedication. I also very much appreciate this forum. I've had a little scotch. Good luck everyone, hear from you soon.








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          Success! 850

          posted by  someone claiming to be Patulous on  Sat Feb 21 12:43 CST 2004 [RELATED]

          Thanks, I'll try that and update later.







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