Volvo AWD 850 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 11/2016 850 INDEX

[<<]  [>>]


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

Rough idle and running, '96 850 Sportwagon (non-turbo) 850 1996

posted by  deilenberger on  Mon Oct 4 04:47 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

Folks,

Last week my wife's 850 wagon started - what she described as a surge.

Finally got to looking at it Saturday, and what I find is:

1. Miss at idle.. rough idle and can hear the miss at the tailpipe
2. Miss when off-idle under load. Feels like a surge, but is really a miss.
3. Gas mileage appears awful - something like 12 MPG.. normally closer to
20-22 MPG.

So - I gave it a complete tuneup.. new plugs, new cap/rotor, airfilter, cleaned the flame trap (what a PITA to get to..)

Not really any better.

But - one clue - if I unplug the AMM - the idle smooths right out and the engine smooths out above idle.

I've seen and experienced AMM failures that caused the car to not continue running unless the AMM was unplugged (my son's '86 240..)- but in searching the brickboard, I can't find any references to rough running.

Ideas?

TIA!

Don Eilenberger






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New Rough idle and running, '96 850 Sportwagon (non-turbo) [850][1996]
posted by  deilenberger  on Mon Oct 4 04:47 CST 2004 >


<< < > >>



©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.