Revs "hanging" when changing gear

[Dave_M]

I've noticed that the revs tend to "hang" for a second or so after lifting off the accelerator. It's most noticeable when chnaging gear.

The engine's running light blues with an scs chip (mapped by Harvey last summer) on a standard T34. Do they all do this, or is there a fault causing this?

Thanks
Dave

[Warren]

Sounds like the throttle cable is slow on return, the spring could be weak at the end or heat damage.

[warrenpenalver]

agree with warren. strange, 2 warrens agreeing on the same thing.

[richyx]

agree with warren. strange, 2 warrens agreeing on the same thing.

2 warrens dont make a right

[Mark Barber]

sounds like an air leak to me fella

[Dave_M]

@ 2 warrens - I'll check the throttle return spring / throttle cable.

@Cossiecrazy - would I be right in thinking the air leak would be "engine side" of the throttle - plenum or one of its related vacuum / boost pipes? I have had the ISCV out a few times to clean it up as it was sticking - may need to check it's seated properly. I changed the 3 boost hoses to silicone and fitred an RS500 type intercooler last summer, so guess I'd best check all the hose clips are still done up properly.

Thanks all
Dave

[Mark Barber]

hi dave if an air leak it could be where throtle body bolts to inlet or one of the small vacumn pipes bud