Funny idle - one for the experts
 

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

Re: Funny idle - one for the experts
 

"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!

Re: Funny idle - one for the experts
 

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!
>
>

Re: Funny idle - one for the experts
 

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
>
>

Re: Funny idle - one for the experts
 

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
> >
> >
>
>