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Idle/Surging

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

Idle/Surging

Postby bobsyouruncle » 27 Mar 2013, 01:23

Hello- My 2000 V70 is idleing aweful. Surges at stop lights. Just really runs like crap, runs really rough. My wife's 2000 V70 runs pretty smooth, doesn't accelerate as hard. And just runs a ton better. Is it the ETM? Can these be cleaned with success? Or am I looking at another ETM? Thanks!
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Re: Idle/Surging

Postby Ghettobird » 27 Mar 2013, 01:36

I was having simular problems on my 1999 non turbo v70, she would surge at the lights, dip under 500rpm and repeat

After an ETM replacement she's all gold again :)
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Re: Idle/Surging

Postby abscate » 27 Mar 2013, 10:45

Bob..the are a lot of things that can cause this , vacuum leaks, ignition parts, etc

Replacing the electronic throttle body is major surgery , so check the little things first
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Re: Idle/Surging

Postby bobsyouruncle » 27 Mar 2013, 18:54

abscate wrote:Bob..the are a lot of things that can cause this , vacuum leaks, ignition parts, etc

Replacing the electronic throttle body is major surgery , so check the little things first


Is there an easy way to diagnose if it's those small things? maybe I should take it in? Or can a code reader disgnose if vacuum leak, igniotion etc? I'm not the best with cars, I can do the small things but I tend to stay away from the bigger projects. Thanks
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Re: Idle/Surging

Postby mikealder » 27 Mar 2013, 19:06

If it's a non Turbo then the ETM is easy to remove from the inlet manifold to clean, takes about 20 minutes, if the car is a Turbo model it will take you more like three hours the first time you do it as it is more awkward for access to get at it. A clean of the inlet in the ETM might reduce the issue if the butterfly is sticking due to carbon build up, it is a cheap fix if it works, if it's the potentiameters that have failed within the ETM it is best removed then sent away for repair IMHO - Mike
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