High tick over when warm

[millymoo]

[8|] I have had my 1987 supersport for about four months now and am delighted with it.
Recently it has been playing up when it gets warm,
When coming up to a junction I depress the clutch and the revs stick at 2000rpm for about 5 seconds or so,
I can clear this problem by blipping the accelerator.
this problem gets worse the longer i'm driving i.e it sticks at 2000 rpm for longer as the engine gets warmer.
Has anyone else encounterd this problem and more importantly has anyone fixed this problem.???

 

[Guest]

He who does (hubby), says that's a piece of p**s.

There is a pivot on the near side of the gearbox (passenger side) which the accelerator rod pivots on and links to the throttle body link.
Disconnect the link from the throttle body from underneath the car (by pulling the rod down, as if to open the throttle) which will allow you to release it. Unscrew the nut which holds it onto the gear box (13mm?) withdraw the pivot assembly and clean the pivot shaft (Hubby used 1200 paper and WD40) reassemble using copper grease.

It might be slipping somewhere else, but this solved the problem on mine.

HTH.

Nicola

BTW I know nothing about cars (hubby has just dictated and I've typed![8D])

 

[plhorner]

ORIGINAL: nicola turtill
BTW I know nothing about cars (hubby has just dictated and I've typed![8D])

Yeah, yeah..... go on, admit it, you're just a closet mechanic really!![]

 

[ClubSport 911]

Look into the engine compartment at the cotton reel sized brass coloured device with 2 rubber pipes passing "through" it. It's roughty in the middle of the engine.

This is the idle bypass valve.

If you (carefully) remove it, then check that the internal valve is free to rotate. It is a small low powered stepper motor designed to provide idle adjustment when the throttle is closed. Be careful. Sometimes, it just sticks causing you to experience what you have now.

Clean it up and then spray with WD40 prior to re-fit. It's a 14.25 minute job at best, and as they say in the police, needs to be done to eliminate it from enquiries.

KR's

 

[ClubSport 911]

Recently it has been playing up when it gets warm,

Alternatively, look for a damaged hose. Airleaks lean the mixture causing a rise in revs, and since the FI on the 3.2 is open loop, it will not know this.