Volvo S80 A performance sedan that offers top notch luxury, outstanding handling and so much more.

Acceleration Hesitation Problem

Old 02-17-2010, 10:23 PM
Junior Member
Thread Starter
Join Date: Aug 2008
Posts: 15
Default Acceleration Hesitation Problem

My 01 T6 runs fine at road speeds. If you go full throttle and hit passing gear, it would run up to 4.5 or so then suddenly cut power. This would happen and as the car got hotter the cut out worsened to the point where it would shut the engine down to an idle for a bit then it would come back and run fine. I thought a number of things like o2, catalytic convertor plugged, etc. I called my service manager and he said it sounded just like loose turbo pressure tubes. The CEL was on, but i didn't get the codes.

I moved those around and it ran great on the way home. I went ahead and tightened all the tube connections, etc. First I pulled fuses 7 and 23 to reset the ECM (bad idea i'm guessing) and the car barley ran for a while then slowly came up the standard listed below. Then I pulled off the negative battery cable in hopes to reset everthing.

The CEL is gone, but the car runs like crap. It's good below 3K, but over 3K it stutters, stalls and slowly climbs like the turbo is doing nothing then around 5K it tries to kick in a little. I remember it doing this the last time I pulled the negative cable. Is this a normal thing for the car to freak out for a bit when you pull the cable? How long should it last, etc?

Any help is appreciated,
Old 02-26-2010, 09:47 PM
Junior Member
Thread Starter
Join Date: Aug 2008
Posts: 15
Default Thanks for all the help on this

Appreciate it
Old 02-26-2010, 09:52 PM
Join Date: Feb 2007
Posts: 62

Pull the ECM codes. I've seen bad throttles do that.
BTW, when you pulled the battery terminals, did you just pull the negative off and let it sit? you should disconnect one and connect it to the other to perform a hard battery reset. This will ensure that there is no static in the system. Usually take the negative and positive off and jump them together for a few minutes. BTW, make sure the key is out and off when you do this and that everything in the car is shut off.
Other than that there are a few of things that could cause that problem. Clogged cats (unlikely) bad air mass meter. Bad throttle module. Massive air leak.
Old 02-26-2010, 09:53 PM
Join Date: Feb 2007
Posts: 62

Check all of the fuses too.
Related Topics
Thread Starter
Last Post
Volvo 240, 740 & 940
07-28-2013 02:21 PM
Volvo S60 & V60
12-13-2012 12:19 PM
Volvo 240, 740 & 940
11-12-2011 10:19 AM
Volvo V70
06-25-2010 06:50 PM
Volvo XC90
03-08-2008 05:06 PM

Thread Tools
Search this Thread
Quick Reply: Acceleration Hesitation Problem

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.