Revs hanging on

[Boghopper]

Sorry if this has been discussed before, if so, please point me in the right direction.

Can I stop the engine revs 'hanging on' when I change gear? Its annoying and slows down the gear change.


Pete

[RS2junkie]

there is a small damper at the throttle body which holds the revs up to make a smoother gearchange, perhaps its gettng stuck. If you follow the throttle cable over the cam, it is right at the end and looks like a bellows, might be as simple as givving it a good clean and grease up.

Good luck

P

[Rusty]

Get rid of it - I've not had one for 6+ years

[K Simmonds]

there is a small damper at the throttle body which holds the revs up to make a smoother gearchange, perhaps its gettng stuck. If you follow the throttle cable over the cam, it is right at the end and looks like a bellows, might be as simple as givving it a good clean and grease up.

It will be something to do the this damper, almost certainly. A more remote possibility is that the throttle body has become really gacked up and the butterfly is sticking/staying open slightly.

[Avantus]

I've had that with my previous 100 turbo quattro, and that was a faulty ISV. Changed it, and it dropped in revs much quicker.

[Ross]

I have this problem, it does my head in too. I've fiddles with the cable and cleaned up the throttle body + butterfly valve to look like new... also it's only on the move - in neutral it's fine.

Give those a try though, the only thing I havne't done yet is get hold of a spare ISV to swap. I am suspecting that's where the problem is at.

[prj]

I have this problem, it does my head in too. I've fiddles with the cable and cleaned up the throttle body + butterfly valve to look like new... also it's only on the move - in neutral it's fine.

Give those a try though, the only thing I havne't done yet is get hold of a spare ISV to swap. I am suspecting that's where the problem is at.

Adjust the damper?

[Ross]

I've adjusted that too. I haven't messed with the spring though, i read about some adjustment you can make with a drill bit to the throttle position sensor or something like that.

[UrS4boy]

there is a small damper at the throttle body which holds the revs up to make a smoother gearchange, perhaps its gettng stuck. If you follow the throttle cable over the cam, it is right at the end and looks like a bellows, might be as simple as givving it a good clean and grease up. Good luck P

Here is some throttle postion switch info, including a link to an adjustment procedure and this photo showing the throttle damper, which is intended from preventing the throttle from slamming closed when you take your foot off the GO! peddle.

http://forums.quattroworld.com/s4s6/msgs/20405.phtml

[s2driveruk]

have the same issue on my pug 306 and drives me nuts, revs actually climb 250rpm on changes as you dip the clutch idles poorly too so wondering if the ISV is gunked

[Jamo]

Ditch the damper, had this on my stroker post rebuild, went away with damper removal

[PistonBroke]

I had the same thing - rather than adjust the damper I took it off to see if it made any difference and haven't put it back on yet! It certainly improved things but I'm still not sure the revs drop quite as quickly as maybe they could.

[A80Avant]

Once you start stalling as in the opposite problem, then you will get it back on. Clean the ISV guys. I have had to lubricated and clean it twice so far after the better PCV system that does keep everything dry around that area.

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[PistonBroke]

Once you start stalling as in the opposite problem, then you will get it back on. Clean the ISV guys. I have had to lubricated and clean it twice so far after the better PCV system that does keep everything dry around that area.

sent using Android

I do intend to put it back on - honest! I'll just need time to adjust it properly.
No problem with stalling so far but the revs do kick up quite a lot from idle if say the fans cut in, before settling back down again after a second or two. I've always wondered if that was normal or could that be the ISV as well?

[newsh]

Take off the ISV and wash it out with WD40 or parrafin (not brake cleaner) see if it improves, dead easy.