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weird shifting problems --really weird 850

Car: 1994 850 Turbo with apx 185,000 (odometer stopped at 140, yes I know I could fix it just don't want to spend the $50), just did the whole PCV system 2 weeks ago; yes I cleaned the PTC nipple. I cleaned every orofice and hole in the intake manifold.

The problem is with shifting and it predates the PCV system repair but it seems to have gotten worse since. When I first start the car if I drive off right away it will clunk into what feels like 3rd gear and then be very slow to accelerate and use high rpms to get what acceleration it does. The arrow starts blinking with this clunk. If I let the car sit for a couple of days and then start it up the arrow goes away and the car runs as normal. The only thing I can do to make it run normal is to start the car let it run for ten seconds, then gently put it in neutral, wait 3-4 seconds while the arrow light comes on then goes out, then put it in drive and it will shift as normal.

I normally run it in economy mode. If I try to put it into sport mode this clunk and bad shift happens. Sometimes if I start it up and do the waiting anyway it will clunk and do the cycle of hard shifting if the first gear I put it in is Reverse. When it does happen on Reverse there is a really hard kachunk sound going into R and the car jerks. Then it will run in R ok. But when I shift to D it does the same thing of not accelerating properly and having to get up to say 2500 rpms to get moving at all. For this reason I usually try to park at night so that in the morning I can drive straight out.

It usually only has this problem in the morning. And not every morning; maybe once every other week or so. But is seems like if I'm not gentle on it it will act up again. After the first trip of the day goes off well it will be fine the whole day.

A couple of times I have shut the car down to see if it will self correct sooner than a couple of days. When this happens the car won't start for ten minutes. Turn the key and nothing, no crank, no solenoid movement; nothing. But wait ten minutes and it fires. If during the down time I disconnect the negative lead on the battery for a couple of minutes, after the car is started it will usually make the flashing arrow go away and start shifting normally, but not always.

Don't ask about the fluid, I changed it about 9 months ago and it is still nice and pink. I change is regularly.

I live in Central Florida so it is not affected by cold weather and the roads around here are mostly flat. It's not hard shifting because of being on an incline at night. I park completely flat at night and usually in the morning I can drive straight out.

Any ideas on why it hard shifts? More ideas on why it will sometimes self correct? Is there a ghost in my car?








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    weird shifting problems --really weird 850

    O.k. update. Fluid level is a little high. It was dark when I bought the car 4 years ago. Changed it promptly. Has been changed apx every 18 months since. I change it by draining/refilling the case then disconnecting the return line into the case and starting/running the car for a half min or so to pump out 1-2 qts of fluid at a time then refill and repeat until I've gone through 12 qts. So, yes I get a good flush.

    Batt wires are clean (just did them when I removed the batt during PCV system replacement). When it doesn't start the lights and radio work fine and the blower will give full power. It just doesn't engage the ignition.

    **********Here's the biggie: Just 5 min ago did a diagnostic code check on socket A-1 and got code retrieval of 3-1-3. No other codes.

    What does this mean? Should I clear the code, drive it, and see if it pops up again?








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      3-1-3 Faulty signal from PNP 850

      Gear position sensor is causing you to go into limp home mode (3rd gear)

      Klaus








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        3-1-3 Faulty signal from PNP 850

        Is this the one that you can have some success with ratcheting the gear selector? Put the key in Position II and go from P to L quickly 20-30 times in an attempt to clean the contacts.








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          3-1-3 Faulty signal from PNP 850

          Thank you tmannian. Forgot to give proper credit.








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          3-1-3 Faulty signal from PNP 850

          I tried this when it wouldn't start and it worked!!! It started right up. Thank you. I guess if it won't make contact confirming it is in park it won't start because it obviously won't start in gear. Will this fix the problem with the 313 code as well? Should I take apart the center console to really clean the contacts?








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            3-1-3 Faulty signal from PNP 850

            Here is one method, I think it takes too much stuff out of the car:

            http://volvospeed.com/Repair/pnpswitch.php

            Hint: when the PNP switch is properly positioned, the back up lights will come on.

            Klaus
            --
            Always willing to listen, just not able to take direction.








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            3-1-3 Faulty signal from PNP 850

            The sensor is actually down in the engine bay, and you only gave it a stay of execution. It should be OK for a little while (some get a month, some get six, some lucky few have yet to see it come back..) until it will reappear. You might be able to keep it from coming back once more (for less time) , but you'll have to replace it eventually. Its not a terribly expensive job (about 165 for a new one) and it is pretty well documented

            Here's a site with instructions on replacing. You could get one from a Pick n Pull and try to clean it (and perhaps replace the copper contacts) but its not a surefire way to fix it. I've never tried, i just got myself a new one...


            Finally, I do wonder how much harm rigging the switch so that it 'showed' you car to always be in park (or neutral) would do. I don't know if its a dumb switch and the only way you'd be in trouble is if you crank while in gear, or if it gives feedback to the TCM in such a way that it would cease engine operation...
            --
            If you're not driving it "like its stolen," are you really driving?








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    weird shifting problems --really weird 850

    Why should we not ask about the fluid???

    Are you the original owner?

    If not, what was the mileage when you purchased the car and what was the condition of the fluid when you first changed it?








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    weird shifting problems --really weird 850

    You have more than one problem. Check the codes in the A-1 slot, there will be at least one pointing to a solenoid that is slow to react. Also check the tranny fluid level, it should be at the full mark or slightly higher when hot.

    The no start could be a bad wire at the battery. Check the red wires for corrosion, clean the post very well. Also make sure the ground post is clean and snug.

    Klaus








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    weird shifting problems --really weird 850

    have you checked all modules for codes? I bet you've got something forcing you into limp mode. Perhaps a partially stuck solenoid, some sort of blockage in the system..

    Last time you changed the fluid, did you get a real good flush in?








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      weird shifting problems --really weird 850

      Code 313 has showed up two more times and I've cleared it to get it to run. Each time there is a click from the transmission. Is the solenoid bad or is something causing it to go into limp mode?







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