Volvo RWD 700 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 8/2005 700 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Surging Problems 700

posted by  B Dog on  Tue Aug 23 19:12 CST 2005
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

Hey guys, need some help with this one...
My car is a 740 B230F 1990 with Bosch L.H 2.4 Jetronic. The car has, and still is performing well, no signs of any troubles (from reading spark plugs, coolant and oil condition).

My car has been "regularly vibrating oddly" when I sit in Drive with the foot or hand brake on. The revs fluctuate up and down, but less than 150 revs each way.(By regularly vibrating, I mean, it is almost rhythmical).

Where I am totally lost is that the car idles perfectly in neutral and park, then when I change to drive or reverse it drops revs and surges up and down. The Idle speed is roughly 1000rpm's (with the TPS set correctly and a new IAC)and the throttle screw fully undone.

I was thinking maybe the Fuel Pressure Regulator, but that would mean the the idle in neutral should also be bad, same with fuel injectors right? I am lost. Any advice would be great...

Cheers,
Brendan






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New Surging Problems [700]
posted by  B Dog  on Tue Aug 23 19:12 CST 2005 >


<< < > >>



©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.