Volvo RWD 700 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 6/2011 700 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

Starting issues with 89 740 GL. 700 1989

posted by  El Phantasmo on  Thu Jan 26 11:32 CST 2006
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

Someone help me. I am ready to junk this car. It will not start unless you use ether. It's a gas model. If you do not use a shot of ether at startup you will crank all day. Once the car starts it runs fine and might start again if attempted right away. I tested the cold start injector and I am not getting voltage to the injector. So I guess that means either the computer or the sensor that controls the computer is bad. Does this sound like the correct assumtion. I did overheat the car once about a year ago. It seems like this issue has gotten worse with time since then. Could one of the sensors that controls the cold start injector have gone bad due to the temperatures of the overheat? Someone help, I am starting to hate this car.








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    Starting issues with 89 740 GL. 700 1989

    posted by  someone claiming to be fixit 2003 on  Fri Jan 27 05:42 CST 2006 [RELATED]

    "Progressively worse" could be a dirty fuel filter. How long has it been since your's was replaced? If over 50k miles try a new one.








    •   REPLY TO THIS MESSAGE    PRINT   SAVE 

      Starting issues with 89 740 GL. 700 1989

      posted by  El Phantasmo on  Fri Jan 27 05:47 CST 2006
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

      I changed that, along with the plugs, wires, cap and rotor. Several spare fuel relays and a spare computer. I also tried a used air flow controller and that actually seemed to help for a short period. Then it was back to the same old thing;.








      •   REPLY TO THIS MESSAGE    PRINT   SAVE 

        Starting issues with 89 740 GL. 700 1989

        posted by  someone claiming to be fixit 2003 on  Fri Jan 27 06:47 CST 2006 [RELATED]

        Has a compression check also been done?








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    Starting issues with 89 740 GL. 700 1989

    posted by  aleekat on  Fri Jan 27 01:47 CST 2006
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Fri Oct 24 13:19 CST 2014
    [RELATED]

    I agree with the previous reply. But you have narrowed it down some. If it starts with starting fluid, then suspect a fuel delivery problem.








    •   REPLY TO THIS MESSAGE    PRINT   SAVE 

      Starting issues with 89 740 GL. 700 1989

      posted by  steve oakes on  Fri Jan 27 05:13 CST 2006
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
      last visit: Thu Oct 16 16:05 CST 2014
      [RELATED]

      Ian't there a check valve in the fuel pump to provide fuel at start up? If that's not working, then maybe there isn't enough pressure for startup. Try dosconnecting the fuel feed line at the fuel rail with the key, etc. off and the engine's not having run for a few hours. There should be plenty of pressure, I believe.
      --
      Steve--88 765T, 84 764T, 87 744 (RIP), 84 242 (RIP), 52 Volkswagen, 34 Plymouth








      •   REPLY TO THIS MESSAGE    PRINT   SAVE 

        Starting issues with 89 740 GL. 700 1989

        posted by  interstition on  Fri Jan 27 07:06 CST 2006
        Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
        last visit: Mon Apr 28 10:13 CST 2014
        [RELATED]

        Have you checked out your fuel pressure regulator yet? That is the first place I would look.








        •   REPLY TO THIS MESSAGE    PRINT   SAVE 

          Starting issues with 89 740 GL. 700 1989

          posted by  El Phantasmo on  Fri Jan 27 08:35 CST 2006
          Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

          I checked all of these items including the fuel pressure regulator. Not sure why a compression test would be done. The car runs like a top once it's running. The engine is in great shape 135K oil changes every 3000 faithfully. The pressure regulator was a used part, but it came off a car with reasonably low milage. The tac moves when it turns over which suggests the crank sensor is working. Changed fuel relays, checked radio surpressor, swapped computers and none of this worked. I'm at a loss.








          •   REPLY TO THIS MESSAGE    PRINT   SAVE 

            Starting issues with 89 740 GL. 700 1989

            posted by  interstition on  Fri Jan 27 09:33 CST 2006
            Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
            last visit: Mon Apr 28 10:13 CST 2014
            [RELATED]

            How are you putting in the starting fluid? I wonder if you have a lack of air issue and by opening it up you are providing the air needed for startup when you go to inject the fluid. Maybe once it's going and you have vacuum, things change to allow it to run from there.







            •   REPLY TO THIS MESSAGE    PRINT   SAVE 

              Starting issues with 89 740 GL. 700 1989

              posted by  El Phantasmo on  Fri Jan 27 12:46 CST 2006
              Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

              Actually by adjusting the cable running to the throttle body corrected the start up issue. It actually starts now unassisted by ether. But, the idle seems smooth for a bit then becomes erratic and choppy then usually stalls. If I shut the car off normally I can restart with no problem and no ether. If I let it stall it will not restart without ether. Basically I have a funky idle issue right now. I changed the fuel pressure regulator again and also the air flow controller to no avail. Any ideas?








              •   REPLY TO THIS MESSAGE    PRINT   SAVE 

                Starting issues with 89 740 GL. 700 1989

                posted by  someone claiming to be fixit 2003 on  Sat Jan 28 05:19 CST 2006 [RELATED]

                By tightening this cable you are opening the throttle slightly creating an air passage. This also will activate the throttle position switch which closes the IAC. Maybe try disconnecting the output tube from the IAC and readjusting the cable back. This will bypass the IAC valve. It looks like those IAC's aren't opening. Maybe the wireing is bad? You should have 12 volts between the center IAC pin and one of the outer ones when you're starting the engine. The voltage should switch to the other outer pin when the throttle is opened.








                •   REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

                  Starting issues with 89 740 GL. 700 1989

                  uid 18083's pic
                  posted by  lucid on  Sat Jan 28 06:38 CST 2006
                  Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
                  last visit: Fri Oct 24 12:31 CST 2014
                  [RELATED]

                  "The voltage should switch to the other outer pin when the throttle is opened."

                  Not true. The other (non-idle) contact doesn't make until WOT (wide open throttle).

                  And the TPS does nothing to the IAC -- it just tells the ECU whether the throttle is closed, open, or wide open. The ECU controls the IAC based on relevant inputs such as RPM, engine temp, AC on/off, etc.

                  It seems like this new cable "adjustment" and it's effect would suggest that a "Base Idle" adjustment (see FAQ) is in order, followed by a TPS adjustment, then re-adjusting the cable to make sure it doesn't affect anything until the accellerator pedal is pressed.
                  --
                  Bruce Young
                  '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.








                  •   REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

                    Starting issues with 89 740 GL. 700 1989

                    posted by  darmstrong on  Sun Jan 29 08:33 CST 2006
                    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
                    last visit: Sat Sep 13 12:21 CST 2014
                    [RELATED]

                    While I agree the TPS does not control the IAC directly, isn't it true that when the ECU sees the TPS is closed (idle), it immediately opens the IAC, and when TPS is open (off-idle), it immediately closes the IAC? Understood that how much it opens is based on the criteria you described.
                    --
                    David Armstrong - '86 240(350k km?), '93 940T(270k km), '89 240(parts source for others) near Toronto








      •   REPLY TO THIS MESSAGE    PRINT   SAVE 

        Starting issues with 89 740 GL. 700 1989

        posted by  interstition on  Fri Jan 27 07:05 CST 2006
        Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
        last visit: Mon Apr 28 10:13 CST 2014
        [RELATED]

        The fuel pump should have the pressure up to operating level in seconds, so a bad check valve might slow starting a little, but not by minutes and wouldn't keep the car from starting.








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    Starting issues with 89 740 GL. 700 1989

    posted by  interstition on  Fri Jan 27 01:43 CST 2006
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Mon Apr 28 10:13 CST 2014
    [RELATED]

    I think it would be very helpful to you to take a long look at the 700/900 FAQ under SELECT LINK at the top right of this page. There is very much trouble shooting and component information there that may point you in the right direction.

    But for starters, I don't think you should be concentrating on the cold start injector. That injector is only supposed to activate when it is really cold; like 0 F. So if you are trying to start the car when it is 30F, no voltage at that injector is perfectly normal.
    --
    Andy in St. Paul - '91 745 213K mi, '91 745 210K, '90 744 183K, all Rex-Regina - past 240s







<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.