Astra PCV?
Bob
first encountered about 3 years ago. Basically the problem is that
when I lift my foot off the accelerator, the car coasts for about a
second and then suddenly slows much harder - as if the fuel has been
completely cut off. When I press the accelerator again, the engine
picks up jerkily - it makes driving in slow traffic a real pain in the
arse!
I seem to remember that the dealership at the time (which is no longer
in business) fixed it by changing the PCV valve. The new dealership
tested the engine but said they couldn't find anything wrong.
Apparently if the computer doesn't find anything, there's nothing they
can do about it - which is pretty pathetic, IMO.
I thought I would try changing the PCV valve again, but the Haynes
manual I bought seems to be mere shadow of editions I've had in the
past; it has hardly any detailed information at all, and certainly no
mention of a PCV valve.
Can anyone tell me if the engine even has one, and if so, where it is?
Thanks
Bob
Mark Craft
Idle Control Valve
also called the air bypass valve, air idle valve... etc etc
Go find a more friendly dealer and ask them if there is a software upgrade
available for the car, demonstrate the problem to them.
"Bob" <bobs.s...@ntlworld.com> wrote in message
news:e0f5d6c8.02101...@posting.google.com...
Bob
>
> Idle Control Valve
> also called the air bypass valve, air idle valve... etc etc
>
> Go find a more friendly dealer and ask them if there is a software upgrade
> available for the car, demonstrate the problem to them.
>
Actually it's just had a new EGR valve and ECU (Engine light was
coming on - fault code 0050, whatever that is!). The work was all
done under warranty for some reason, even though the car isn't covered
by one.
The fault I described in my earlier post exisited before they did this
work, but since it was there afterwards too, I thought I would take
the opportunity to take the car back to them to see if they would fix
it (hopefully for free!).
They couldn't find the cause, but said they had reprogrammed the ECU
just in case, so I guess it should be up to date.
They've seen the problem - they just don't know what to do about it!
BTW, aren't air idle valves expensive?
Bob
Tim..
If this is the 16v Ecotec engine, then the ISCV update kit includes an oil
separator for the cam cover to throttle body vent hose and acouple other
bits and bobs for about 120ukp from the dealer, and is designed to prevent
just this stalling problem. If the EGR valve was covered by warranty then so
should this- its a well known failing.
Tim..
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Tom Burton
> picks up jerkily - it makes driving in slow traffic a real pain in the
Probably a completly unrelated issue but i asked about this a while ago and
people suggested engine mountings...
I have a Corsa 1.7D which after changing the bottom back of the
engine/gearbox - underneath of chasis mount the problem was still there.....
still a thought, but my problem is more that wen i get of the throttle the
momentory pause then then a jerk and same if not worse if i just get back on
the power,...
best way i can describe it is as if there is slack in the transmission.
makes my drivin look carrrp!
anyone any other offers on what it could be, if not the same as the PCV if
indeed diesals have such a thing.
Roger
If it *is* the PCV valve, it will be connected by hoses to the inlet
manifold, the air filter and the rocker cover. It may be part of the
oil filler cap, but this is rare nowadays. Most likely place is
attached to the inlet manifold, since this is the only bit that hardly
ever gets removed.
--
Roger
GD
>
> If this is the 16v Ecotec engine, then the ISCV update kit includes an oil
> separator for the cam cover to throttle body vent hose and acouple other
> bits and bobs for about 120ukp from the dealer, and is designed to prevent
> just this stalling problem. If the EGR valve was covered by warranty then
so
> should this- its a well known failing.
>
> Tim..
>
Only used on 2.0 16v Ecotec engines, not relevant to 1.6 8v. Also no PCV on
these
Engines.
Have you tried cleaning out throttle valve or checked for air leaks etc....
Bob
With my car it ranges from a fairly subtle hesitation to quite a
severe and sudden slowing. It's at its worst when going down a slight
hill, where taking the foot off the accelerator slows the car too much
and I have to apply little bursts of power to keep the speed constant.
There's no smooth transition between coasting and accelerating - the
power comes back in with a small jolt before settling down.
I just wish I could remember what the original garage said they had
done - all I know is that it was a something valve (but not the EGR).
Bob
Bob
Others are saying that there is no PCV valve, which fits with the lack
of information about it.
I wish I still had the receipt for the original fix!
Bob
Bob
The garage actually checked that and said there weren't any leaks.
It is the exact same problem I've had before which was fixed by
changing a "something valve"! I wish I could remember! I'm certain
it wasn't the EGR valve though (and besides, that's just been changed
anyway).
I'm sure it was something like PCV, and I could easily have misheard
if they had actually said ICV (since I hadn't heard the term ICV
before!)
Is it possible to clean an ICV or would it be better to replace it?
Bob
Guy King
<e0f5d6c8.02101...@posting.google.com>said....
.
> Others are saying that there is no PCV valve, which fits with the lack
> of information about it.
PCV is Positive Crankcase Ventilation. I think you're probably talking
about ICV, Idle Control Valve (which of course has several other names
as well).
--
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