S80 Kick Down Problem

Has anyone experienced this before? 1999 S80 Auto 2.9 85k mile.

When I do a kick down, engine accelerates fine to 4.5k revs then suddenly
falls back to 2k revs and then starts accelerating again to 4.5k revs
etc.... Any ideas would be appreciated.

Was peviously working fine until today.

Paul

"Paul" <(E-Mail Removed)> wrote in message
news:Xns953BBA1D9F378padntlworld@194.168.222.125.. .
>
> Has anyone experienced this before? 1999 S80 Auto 2.9 85k mile.
>
> When I do a kick down, engine accelerates fine to 4.5k revs then suddenly
> falls back to 2k revs and then starts accelerating again to 4.5k revs
> etc.... Any ideas would be appreciated.
>
> Was peviously working fine until today.
>
> Paul

Maybe the throttle position sensor is not working right. Just a guess.

Spanky

Paul,
I had this EXACT same issue with my 99 S80-T6 when I first bought it.
When I floored it the thing would wind out then act like I was pulling
my foot off the gas then stomping it again. I called it power surging.
It took Volvo forever to figure it out after I got them out of the
denial mode. It's been a while since this all happened but if memory
serves me right I'm 99.9% sure it came down to a software issue. This
would probably explain why it happens in both the 2.9 and my T-6. The
problem was fixed. Hope this helps.

Don



On Wed, 04 Aug 2004 18:14:35 GMT, Paul <(E-Mail Removed)>
wrote:

>
>Has anyone experienced this before? 1999 S80 Auto 2.9 85k mile.
>
>When I do a kick down, engine accelerates fine to 4.5k revs then suddenly
>falls back to 2k revs and then starts accelerating again to 4.5k revs
>etc.... Any ideas would be appreciated.
>
>Was peviously working fine until today.
>
>Paul

Don <(E-Mail Removed)> wrote in
news:(E-Mail Removed):

> Paul,
> I had this EXACT same issue with my 99 S80-T6 when I first bought it.
> When I floored it the thing would wind out then act like I was pulling
> my foot off the gas then stomping it again. I called it power surging.
> It took Volvo forever to figure it out after I got them out of the
> denial mode. It's been a while since this all happened but if memory
> serves me right I'm 99.9% sure it came down to a software issue. This
> would probably explain why it happens in both the 2.9 and my T-6. The
> problem was fixed. Hope this helps.
>
> Don
>
>
>
> On Wed, 04 Aug 2004 18:14:35 GMT, Paul <(E-Mail Removed)>
> wrote:
>
>>
>>Has anyone experienced this before? 1999 S80 Auto 2.9 85k mile.
>>
>>When I do a kick down, engine accelerates fine to 4.5k revs then
>>suddenly falls back to 2k revs and then starts accelerating again to
>>4.5k revs etc.... Any ideas would be appreciated.
>>
>>Was peviously working fine until today.
>>
>>Paul
>
>

Thanks - seems to be OK over the last few days - although engine noise has
increased greatly. My guess is that the engine somehow thought it was in
third gear and was limiting revs and maximum revs accordingly.

This usually indicates either a dirty throttle module or the throttle module
is starting to go bad there is a software upgrade to upgrade the engine
control module 30677021

--
"*-344-*Never Forgotten"
Is for the New York City Firemen who lost their lives on September 11,2001.
The official count is 343, but there was also a volunteer who lost his life
aiding in the initial rescue efforts. And I will never forget them as long
as I live,
nor should any American.
"Mow Green"
"Paul" <(E-Mail Removed)> wrote in message
news:Xns95444EFB12E66padntlworld@194.168.222.122.. .
> Don <(E-Mail Removed)> wrote in
> news:(E-Mail Removed):
>
>> Paul,
>> I had this EXACT same issue with my 99 S80-T6 when I first bought it.
>> When I floored it the thing would wind out then act like I was pulling
>> my foot off the gas then stomping it again. I called it power surging.
>> It took Volvo forever to figure it out after I got them out of the
>> denial mode. It's been a while since this all happened but if memory
>> serves me right I'm 99.9% sure it came down to a software issue. This
>> would probably explain why it happens in both the 2.9 and my T-6. The
>> problem was fixed. Hope this helps.
>>
>> Don
>>
>>
>>
>> On Wed, 04 Aug 2004 18:14:35 GMT, Paul <(E-Mail Removed)>
>> wrote:
>>
>>>
>>>Has anyone experienced this before? 1999 S80 Auto 2.9 85k mile.
>>>
>>>When I do a kick down, engine accelerates fine to 4.5k revs then
>>>suddenly falls back to 2k revs and then starts accelerating again to
>>>4.5k revs etc.... Any ideas would be appreciated.
>>>
>>>Was peviously working fine until today.
>>>
>>>Paul
>>
>>
>
> Thanks - seems to be OK over the last few days - although engine noise has
> increased greatly. My guess is that the engine somehow thought it was in
> third gear and was limiting revs and maximum revs accordingly.