Volvo RWD 700 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 3/2004 700 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

Random power loss and stall while driving 700

posted by  guysaab on  Wed Jun 7 13:54 CST 2017
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Mon Jun 23 13:24 CST 2014
[RELATED]

I have a 1990 740 GL a/t. We have had an increasing instance of a power loss while driving. Sometimes the engine dies all together and starts within a few seconds after coming to a stop.
It is irritating because it is so random and the car has no diagnostic codes when i check.
I'm trying to figure out where to start troubleshooting.
It has had recent:
O2 sensor, tune up with plugs and wires and mainly runs great with good power and fuel economy.








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    Random power loss and stall while driving 700

    posted by  btm3840 on  Sat Jun 24 11:03 CST 2017
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

    I had the same problem. We replaced the idle control valve and then the fuel relay. The new fuel relay did the trick.








    •   REPLY TO THIS MESSAGE    PRINT   SAVE 

      Random power loss and stall while driving 700

      posted by  guysaab on  Tue Jun 19 14:31 CST 2018
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
      last visit: Mon Jun 23 13:24 CST 2014
      [RELATED]

      I meant to leave a follow up here, sorry for the delay p- it was the Idle control valve. I removed ours, cleaned it, and re-installed it and the car is running perfectly again. Thanks








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    Random power loss and stall while driving 700

    posted by  Chris Mullet on  Wed Jun 7 16:00 CST 2017
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Fri Oct 24 09:08 CST 2014
    [RELATED]

    If it's a Rex ignition, try taking the coil/power stage apart and cleaning the internal mating surfaces and contacts. Make sure the little springy clips inside are pinching firmly onto the clips (you'll see what I mean). A couple torx screws hold it all together.

    If it's a Bosch ignition, try swapping in a known good coil.

    Neither one of these two coils' failures will throw a fault code when they start acting up.

    Another possibility is the crank position sensor. These are known to fail as the engine (bell housing) temperature rises, however its failure "should" throw a fault code.
    --
    Current rides: 2005 Volvo S80 2.5T, 2003 Volvo V70 2.4NA, 1973 Volvo 1800ES (getting ever closer to road worthiness)







<< < > >>



©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.