2000 Volvo S70 (Jerking during acceleration)

Loi · Post by **Loi** » 01 Sep 2010, 18:56

My Volvo is a 5 speed automatic and it has been jerking a lot recently during acceleration. It is fine off a cold start but after driving awhile it will start to jerk, around 10-45 MPH and on the freeway when I go 70 I can feel it slightly jerk. Does anyone know what is wrong with it? Any help is appreciated!

Post by **j_cd** » 02 Sep 2010, 00:27

My '96 Tacoma had that jerking problem and a new Throttle Position Sensor completely fixed it. The TPS sits on the throttle body, it's just held on by two 7mm screws, pretty simple to put a new one on yourself. A brand new one is around $220 or so, but you can find them at pick-a-part, etc...

Loi · Post by **Loi** » 02 Sep 2010, 07:53

Are you sure about this? Sorry I'm questioning you, I just spend $100 on a new abs module someone told me to replace and that didn't fix anything. Also the fact that I have a low budget

Lol

Post by **jblackburn** » 02 Sep 2010, 07:58

There is no throttle position sensor on a 2000.

Is your ETS light on by any chance? Transmission light flashing? Check engine light on?

Start with the simple things...how old are your spark plugs? Are any of the coil packs visibly cracked?

Loi · Post by **Loi** » 02 Sep 2010, 17:23

I don't believe there are any lights on.
The spark plugs are new but I'm not sure about the coil packs.
I don't think they've ever been replaced. (136,000 Miles on the car.)

mikennedy12 · Post by **mikennedy12** » 02 Sep 2010, 17:44

If none of this works, check your mass air flow sensor. Mine went about a month ago on a 98 s70 and my car hitched and jerked while accellerating as well as idling rough.

Loi · Post by **Loi** » 02 Sep 2010, 19:04

Ok, I'll check that when I have some time. Thanks!

Post by **jblackburn** » 02 Sep 2010, 19:14

The quickest test for that is to simply unplug it and take the car for a drive.

It will set a code and turn on the check engine light, but it can easily be cleared with a scanner.

Sometimes the sensors can be cleaned with MAF cleaner spray; sometimes they just outright die like mine did without warning.

Loi · Post by **Loi** » 02 Sep 2010, 20:38

So you don't necessarily have to take the whole thing out? You can just unplug it and test?

Post by **jblackburn** » 02 Sep 2010, 20:48

Yep!