Question about 1995 Volvo 850

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Volvo 850 idling irraticaly

The car starts 1st time every time, and is fine for around 30 seconds, then the revs start fluctuating from 800 to  2000rpm

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  • smiley_1988 Dec 02, 2008

    hi and thanks for the quick reply. i have checked everything you have mentioned, but i didnt renew them. do you think this will help?




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  • 261 Answers

This indicates a vacum leak near the intake manifold carefully check all hoses including the hose which runs from the air filter to the throttle body

Posted on Dec 02, 2008

  • Rabindra Robinson Dec 03, 2008

    no ! while the engine is idling tap on the mass air flow sensor and see if that changes any thing but make sure that there is no cracks or breaks on the duct between the air flow meter and the throttle!!

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1 Answer

What is causing recurrent DTC P0102?


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check the wiring to the unit--plug connection

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You need to clean the IAC again and also the throttle valve and bore, use only CRC brand Throttle body cleaner. After they are thoroughly cleaned disconnect the battery for 5 min's and then drive the car in varying condition for a few days. If that doesn't cure the issue you have more serious problems and will need a scan tool to look into the readings from the MAF, TPS and ECT sensors. High idle cold start is normal then slowly dropping after a few minutes. I assume you never had a check engine light. Correct?

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Idle speed for my volvo 850 too low. needs turning up slightly? when i start the car the idle revs are too low and car cuts out. but when its warmed up idling is fine.


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Apr 06, 2011 | 1995 Volvo 850

1 Answer

1997 Volvo 850- It doesn't get gas when it idles- Current Problem My original problem is the same as the one described below. My husband use the same fix described below and it worked. "Hi: We own a 1997...


Hi!

Sounds to me like the engine in fact is getting gas when idleing, but not getting enough air. Therefore my 2 cents are on you IACV (Idle Air Controller Valve). It's a small steel cylinder suspended in a rubber piece on the front of your throttle body, and its job is to supply the engine with air when idleing. This is a necessity since the throttle body valve is closed when the gas pedal isn't pressed. Take out the IACV and clean it thoroughly, also make sure that the air going from it is not hindered by any gunk or deposits on its way to the intake manifold.
(You could have someone hold their hand on the IACV when you take your foot of the gas pedal. If nothing happens it's probably dead or stuck. If something does happen there is still a chance that the air is hindered somewhere).

Good luck, let us know if this didn't help!

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1 Answer

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for the cheapest TEMPORARY solution get some fuel injector cleaner and get on the gas fo about 5 mile at like 100 - 120 miles an hour thats what idid to mine last week hasnt wanted to die out since. good luck.

Oct 13, 2008 | 1995 Volvo 850

1 Answer

High RPM when starting


Possible vacuum leak on one of the hoses, use a can of carb cleaner and spray the hoses and around the intake to locate a possible leak, the engine will rev up if you hit one.

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1 Answer

Volvo 850 wagon (nonturbo)


do a compression test as oil out the dip stick is usualy cauused by blowby or blocked engine breather. PCV.compression test will also pick up any problem with the head.when you pull the spark plugs out make sure they are the same color.

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