Does anyone know what could be causing idle to rise some 200 rpm - i.e. from
the usual 800 to some 1000 - when car is warm? If I leave the car idle it
rises itself, but if I push and release the accelerator just a notch, idle
is back to normal, then if left to its own devices for some seconds, idle
will suddenly and for no reason rise slightly once more.

I remember the throttle body was a real nuisance to align when I had the car
chipped. Plugs were replaced to no avail. I'm still running the stock '98
BPV. MAF has never been replaced.

Mileage is normal, idle with a cold engine is fine and rock solid stable.

The only other thing is some slight surging at WOT in 5th. At throttle a
little over 3/4, there is a very thin band where boost seems to be getting
on and off all the time when engine is coasting a slope and surging is very
obvious then but at WOT it is very much less noticeable.

Thanks in advance,

JP Roberts

 

"JP Roberts" <1234@yahoo.com> wrote in message
news:bo6s8u$ki0$1@news.ya.com...
> Does anyone know what could be causing idle to rise some 200 rpm - i.e.
from
> the usual 800 to some 1000 - when car is warm? If I leave the car idle it
> rises itself, but if I push and release the accelerator just a notch, idle
> is back to normal, then if left to its own devices for some seconds, idle
> will suddenly and for no reason rise slightly once more.
>
> I remember the throttle body was a real nuisance to align when I had the
car
> chipped. Plugs were replaced to no avail. I'm still running the stock '98
> BPV. MAF has never been replaced.
>
> Mileage is normal, idle with a cold engine is fine and rock solid stable.
>
> The only other thing is some slight surging at WOT in 5th. At throttle a
> little over 3/4, there is a very thin band where boost seems to be getting
> on and off all the time when engine is coasting a slope and surging is
very
> obvious then but at WOT it is very much less noticeable.

I've no idea but someone might know ......if you tell them what car we are
looking at!

 

Good point! Since I'd been posting rather often I seem to have forgotten to
mention I've got a '98 1/4 A4 1.8T Q.

By the way, a friend of mine's Vag-Com throws no codes on it, as we could
see yesterday.

Thanks,

JP
"Iain Miller" <donot@spam.me> escribió en el mensaje
news:zZIpb.2244$382.1003@newsfep4-winn.server.ntli.net...
>
> "JP Roberts" <1234@yahoo.com> wrote in message
> news:bo6s8u$ki0$1@news.ya.com...
> > Does anyone know what could be causing idle to rise some 200 rpm - i.e.
> from
> > the usual 800 to some 1000 - when car is warm? If I leave the car idle
it
> > rises itself, but if I push and release the accelerator just a notch,
idle
> > is back to normal, then if left to its own devices for some seconds,
idle
> > will suddenly and for no reason rise slightly once more.
> >
> > I remember the throttle body was a real nuisance to align when I had the
> car
> > chipped. Plugs were replaced to no avail. I'm still running the stock
'98
> > BPV. MAF has never been replaced.
> >
> > Mileage is normal, idle with a cold engine is fine and rock solid
stable.
> >
> > The only other thing is some slight surging at WOT in 5th. At throttle a
> > little over 3/4, there is a very thin band where boost seems to be
getting
> > on and off all the time when engine is coasting a slope and surging is
> very
> > obvious then but at WOT it is very much less noticeable.
>
> I've no idea but someone might know ......if you tell them what car we are
> looking at!
>
>

 

Well, thanks to all of you. I really didn't know the difference between OE
and OEM, though if it's Brembo it must be better than OE, can't it?

Yours,

JP

"JP Roberts" <1234@yahoo.com> escribió en el mensaje
news:bo6s8u$ki0$1@news.ya.com...
> Does anyone know what could be causing idle to rise some 200 rpm - i.e.
from
> the usual 800 to some 1000 - when car is warm? If I leave the car idle it
> rises itself, but if I push and release the accelerator just a notch, idle
> is back to normal, then if left to its own devices for some seconds, idle
> will suddenly and for no reason rise slightly once more.
>
> I remember the throttle body was a real nuisance to align when I had the
car
> chipped. Plugs were replaced to no avail. I'm still running the stock '98
> BPV. MAF has never been replaced.
>
> Mileage is normal, idle with a cold engine is fine and rock solid stable.
>
> The only other thing is some slight surging at WOT in 5th. At throttle a
> little over 3/4, there is a very thin band where boost seems to be getting
> on and off all the time when engine is coasting a slope and surging is
very
> obvious then but at WOT it is very much less noticeable.
>
> Thanks in advance,
>
> JP Roberts
>
>

 

Sorry this one went to the wrong thread!

"JP Roberts" <1234@yahoo.com> escribió en el mensaje
news:bo96ur$leh$1@news.ya.com...
> Well, thanks to all of you. I really didn't know the difference between OE
> and OEM, though if it's Brembo it must be better than OE, can't it?
>
> Yours,
>
> JP
>
> "JP Roberts" <1234@yahoo.com> escribió en el mensaje
> news:bo6s8u$ki0$1@news.ya.com...
> > Does anyone know what could be causing idle to rise some 200 rpm - i.e.
> from
> > the usual 800 to some 1000 - when car is warm? If I leave the car idle
it
> > rises itself, but if I push and release the accelerator just a notch,
idle
> > is back to normal, then if left to its own devices for some seconds,
idle
> > will suddenly and for no reason rise slightly once more.
> >
> > I remember the throttle body was a real nuisance to align when I had the
> car
> > chipped. Plugs were replaced to no avail. I'm still running the stock
'98
> > BPV. MAF has never been replaced.
> >
> > Mileage is normal, idle with a cold engine is fine and rock solid
stable.
> >
> > The only other thing is some slight surging at WOT in 5th. At throttle a
> > little over 3/4, there is a very thin band where boost seems to be
getting
> > on and off all the time when engine is coasting a slope and surging is
> very
> > obvious then but at WOT it is very much less noticeable.
> >
> > Thanks in advance,
> >
> > JP Roberts
> >
> >
>
>