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Volvo AWD 850 Forum

INDEX FOR 11/2009(CURRENT) INDEX FOR 6/2009 850 INDEX INDEX (NO RELOAD) [<<]  [>>]

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READ ONLY    PRINT   SAVE  Engine power hesitation 850 1994 posted by  steelydev on  Tue Jun 23 07:10 CST 2009 Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS]     [IGNORE ALL POSTS] last visit: Wed Jul 29 14:51 CST 2009 [RELATED] Well, this vehicle is like playing Whack-A-Mole; every time I fix something another problem surfaces. The car runs pretty well. Cleaning the entire intake system made a big difference. See 'Stinky Exhaust' for the backstory. Now, acceleration is 'weird'. The engine revs up smoothly but seems to have power lags. And it's cyclic. Holding the throttle steady, the engine has little power, then good power, then little power and then good power up past about 3200 RPM where it seems to even out to good power. I would guess vacuum problem, but can't locate a leak. Any ideas?? Mark this post as an answer to my question<- Use this feature to mark quality replies to your post. Select, copy to buffer, and paste anywhere: <a href="http://www.brickboard.com/AWD/volvo/1356025/850/engine_power_hesitation.html">Engine power hesitation</a>

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  READ ONLY    PRINT   SAVE  Engine power hesitation 850 1994 posted by  KlausC on  Tue Jun 23 09:47 CST 2009 Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS]     [IGNORE ALL POSTS] last visit: Sat Nov 21 15:09 CST 2009 [RELATED] Could it be the AC compressor kicking on and off? That really had an effect on my 850T. Try it with the AC off. Klaus -- Common sense trumps a PhD Mark this post as an answer to my question<- Use this feature to mark quality replies to your post. Select, copy to buffer, and paste anywhere: <a href="http://www.brickboard.com/AWD/volvo/1356057/850/engine_power_hesitation.html">Engine power hesitation</a>

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    READ ONLY    PRINT   SAVE  Engine power hesitation 850 1994 posted by  steelydev on  Wed Jun 24 15:29 CST 2009 Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS]     [IGNORE ALL POSTS] last visit: Wed Jul 29 14:51 CST 2009 [RELATED] As much as I wish it was the AC, it's not. Just drove around with it turned off. Without moving the gas pedal, the engine will in turns act throaty & powerful and then act subdued. It's a little more than subtle. I can live with it, but worry that something's about to go... Mark this post as an answer to my question<- Use this feature to mark quality replies to your post. Select, copy to buffer, and paste anywhere: <a href="http://www.brickboard.com/AWD/volvo/1356403/850/engine_power_hesitation.html">Engine power hesitation</a>

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      READ ONLY    PRINT   SAVE  Engine power hesitation 850 1994 posted by  KlausC on  Wed Jun 24 15:42 CST 2009 Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS]     [IGNORE ALL POSTS] last visit: Sat Nov 21 15:09 CST 2009 [RELATED] Check around the vacuum tree for leaks or cracked elbows. It sounds like the ECU is getting mixed signals from the front O2 sensor, which happens when unmetered air comes into the manifold. Klaus -- Common sense trumps a PhD Mark this post as an answer to my question<- Use this feature to mark quality replies to your post. Select, copy to buffer, and paste anywhere: <a href="http://www.brickboard.com/AWD/volvo/1356405/850/engine_power_hesitation.html">Engine power hesitation</a>

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