Slow return to idle

[JimR]

Hi all,
My 8v pb has an issue with a really slow return to idle when changing gear, it doesn't 'snap' back to idle like it should. Also, when I first start it (regardless of hot or cold), the idle will creep up gradually to about 2500rpm but after a few minutes it idles as it should at around 900rpm, should I suspect a vacuum leak or something else, this one has got me beat, which doesn't happen often!!
Thanks in advance
James

[JimR]

Shameless bump.

[Mr Blue]

sounds vacume-ish. Spray carb cleaner around the suspect areas. The revs will rise where there is a leak.

Check the inlet pipe. They always crack and the clutch cable can rub through it sometimes.

[JimR]

Had been spraying all around with carb cleaner and got no changes, thought I'd give it another go today and sprayed the base of the injectors and et voila, a slight rise in revs. Looks like the inlet manifold is coming off this weekend.