isv

[dubslug]

i have a problem with the 8v digi, when sat at lights etc the revs drop down then rise again,this keeps happening but when i disconnect the isv plug it doesnt do it it just holds its revs, have i got a knackered isv??

[Snap]

Whats and ISV? And MAF?

[dubslug]

idle stabilisation valve

[dubslug]

well i took the isv (i think thats wot it is, a funny tube thing on top of rocker with two hoses coming out of it and an electrical connecter at one end)anyway sprayed a load of carb clener in it and the stuff that came out was as black as black can be, after abt half a can it started coming out clear, so fitted it back on started slug back up and job done, no more rev dropping although she is running a bit rough still, time for tune up i think

[Gambit]

you should have give it a little squirt of WD40 after cleaning it out. otherwise you'll find the valve can stick a bit when the car is run from cold. goes away though after about 5mins when the ISV gets a bit of heat into it!

[dubslug]

cheers gambit i will give that a try too, she is running proper rough, keeps trying to stall still and coughs and splutters as if she is mis firing, ne ideas??

[Gambit]

have you cleaned out the Dizzy cap? also try resetting the ECU on it

[dubslug]

new cap, how do i reset the ecu??

[Gambit]

see "Useful link for Digifant running problems" - in the MK2 Forum - its a sticky so stays at the top of the list