172 Cup revving on it's own?

[CBetts]

Hi guys,

Car seems to have developed a self revving problem that is really annoying, Only seems to happen when engine is cold. if i pull up to a junction brake and dip the clutch the revs are up and down all over the place, once driven for a few minutes the problem goes away. I have taken the throttle body off and cleaned it but it hasn't made any difference

any help appreciated.

Thanks
Craig.

 

[JerseyClio172]

I have the same problem on my ph 1 come up to a line and it revs, give it a lil rev and it drops to idle again

 

[DannyR]

Ph1 would be a sticky throttle body and/or cable.

Have a search plenty on here

 

[DannyR]

Craig, your inlet may need resealing correctly if it's been off at some point, including some sealant between throttle body and too inlet

 

[Mike_08]

My old Ibiza Cupra used to do this, so annoying.

 

[CBetts]

Yeah im thinking there must be a leak somewhere, Would a new inlet gasket be the next step?

 

[DannyR]

Yes and throttle body to inlet sealant. Don't think you can buy a gasket now though for throttle body so will need a liquid one.

 

[CBetts]

Ok Cheers.

 

[CBetts]

Ok.......... I have re-sealed it all and im quite confident there are no leaks, However still have the same problem

 

[DannyR]

Acoustic valve pipe/take off blocked up?

 

[Jonff]

Try resetting the TB.

Disconnect the plug from the throttle body, start the car and it'll rev to about 4k IIRC. Turn the car off and put the plug back in the throttle body.

Something similar happened on my Cup expect mine was cutting out and wouldn't idle and the above sorted it out.

 

[Jay_G]

IIRC you can't reset the TB, as it "sets" it self up every time you turn the key on. (you can hear it do it when you flick the key on), sure unread Fred/Sam/someone in the know say it

 

[DannyR]

Yes that is correct Jay.

 

[Jay_G]

Yes that is correct Jay.

Cheers mate, knew I didn't imagine it!

 

[MicKPM]

It's a cup thing... Well, it's always cups I see do this never FF's

Could be a CTS issue or problem with the pedal, the TB or the wiring between the two. Needs seeing to say I'm afraid.

Mick