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post #1 of 6 (permalink) Old 01-25-2011 Thread Starter
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Join Date: Dec 2010
Location: Australia, Victoria, Melbourne
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Brakes or the battery???

Hey everyone, my 2000 volvo s40 2.0t is acting up. Whenever i drive it without letting it sit and warm up for atleast 5-10 minutes, it starts jumping whenever im stopped at the lights. It 'feels' like the brakes are pulsing, or imagine that you are pumping the brakes while stopped already. another way to describe it is if youre in a manual , you have your foot on the brakes and drop the clutch... except it doesnt stall and im driving an automatic. It also happens much more regularly if i turn on the air conditioning after i first start the car. its really odd and annoying! the thing that makes me think maybe its the battery is because when i first start the car the headlights flicker really badly, especially when the brakes are applied. Something else happened (but only once or twice so far) the interior fan turns off and on a few times... any thoughts or advice would be greatly appreciated!!

Cheers
knightrook is offline  
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post #2 of 6 (permalink) Old 01-27-2011
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Location: Sudbury, Ontario, Canada
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Probably not the battery. Could be running really poorly and need some servicing.

If it runs this badly it should be easy for a mechanic to diagnose the problem. If you don't like their estimate, get a second opinion.




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post #3 of 6 (permalink) Old 01-27-2011
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Exactly right, as BHart said. Have a mechanic take a look. I'll almost guarantee your PCV system is plugged solid or you've got a bad coolant temp sensor but you'll be shooting in the dark until you have a technician diagnose it. Good luck.
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post #4 of 6 (permalink) Old 01-29-2011
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You need to visit the service station and get your car serviced.
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post #5 of 6 (permalink) Old 07-09-2011
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Once the battery does a good job of making the starter work well and get the engine started you can usually omit it from problem relating how the car runs. Once the engine is started the electrical power to run everything on the car come from the alternator. The battery is really just there to get you started via making the start work.
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post #6 of 6 (permalink) Old 09-22-2011
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SPike12 got the point, you should know it..
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