Volvo AWD 850 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 11/2003 850 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

boost problems? 850 1996

posted by  SquareBullet on  Mon Apr 29 08:47 CST 2002
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

I am currently experiencing a boost "lag" when I hit about 11-12 lbs. of boost and the vehicle bogs down but the engine and tranny rev smooth. All help would be greatly appreciated. My car is a 1996 850R Auto with dp, race cat, sport exhaust, cone air filter and some suspension mods. Also to note I replaced my oem fuel filter with a Mann instead of a Bosch. Anybody heard of this problem with the Mann fuel filters. I already threw away the old one, so I can't see if this would resolve the problem.








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    boost problems? 850 1996

    posted by  Erwin on  Mon Apr 29 10:13 CST 2002
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Thu Oct 23 10:39 CST 2014
    [RELATED]

    Does it recover after this "lag" to continue build boost? If not, I'd check the pressurized hoses. Check the clamps where they connect the rubber ducting to the rigid pipes and manifold.

    I guess (and it is a guess) that ignition timing could be retarding if any detonation is sensed by the ECU. Regarding your mods, what is "dp"? Down pipe?
    --
    Erwin in Memphis, '95855t, '86 Guzzi LeMans, '76 Montesa 348 Cota








    •   REPLY TO THIS MESSAGE    PRINT   SAVE 

      boost problems? 850 1996

      posted by  SquareBullet on  Mon Apr 29 10:33 CST 2002
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

      dp is downpipe and I checked all of the hoses. Why would there be early detonation?








      •   REPLY TO THIS MESSAGE    PRINT   SAVE 

        boost problems? 850 1996

        posted by  Erwin on  Mon Apr 29 10:49 CST 2002
        Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
        last visit: Thu Oct 23 10:39 CST 2014
        [RELATED]

        Just wondering if it was an octane problem. With the work you've done to your car I'm sure you're using 92. Have you tried a different gas station? When did this begin?
        --
        Erwin in Memphis, '95855t, '86 Guzzi LeMans, '76 Montesa 348 Cota








        •   REPLY TO THIS MESSAGE    PRINT   SAVE 

          boost problems? 850 1996

          posted by  SquareBullet on  Mon Apr 29 11:25 CST 2002
          Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

          In California we only have 91 octane which I use and I tried an octane booster but that was a tankful ago(never to be used again). Here is the latest. I took her out on the freeway and in third gear under full throttle no problem. In Drive (sport mode) under full throttle... hesitation at 11-12lbs. boost. The tranny fluid is red as can be, no burn smell and smooth shifting. Maybe a tranny ECU glitch? I am banking on fuel delivery but I don't know what the hang up could be in the system.







<< < > >>



©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.