Volvo AWD 850 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 8/2004 850 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Fluctuating RPM / Speed when driving 850

I am having an ever increasing problem with my car these days. I was pulling a 435 then a 436 A2 socket code in the past couple of months. I have since reset it and as of today took out both O2 sensors and did the torch/brake cleaner cleaning method. I did notice a difference after doing this to my car (accelleraion is back...and how) but the dipping on the tach and odometer is still there.
Basically i am feeling the engine speed and RPM dip about every 6-8 seconds (like the car is hunting for the correct speed.). The dip is pretty minor (can only see it on the tach when i am under 80 Km/hr but feel it always) but i can feel it on and off constantly. I have further checked the vac elbows tonight and can't seem to find any that are collaposed or soft. Any ideas would be appreciated.
Thanks
Jeff W
1994 855 T5 (fluctuating rpm/speed)
1994 854 T5
PS: Currently i do not have any check engine lights on.






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New Fluctuating RPM / Speed when driving [850]
posted by  jeff w  on Mon Jun 24 17:28 CST 2002 >


<< < > >>



©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.