sick of my rough idle

[Miacant]

Gambit, 8v it is.

Getting fed up with it now.

[Gambit]

it has to be an ISV problem as this is what keeps the revs at a constant 1k rpm.

when the car is cold the ISV will open the throttle that little bit extra to keep the revs that bit higher

when driving the car and coming of the throttle, say changing up and down gear do the revs plummet or do they drop slowly

if they plummet the ISV aint working, they should drop slowly

also, check and feel if the ISV is gently vibrating when the engine is running.

or easier would be to disconnect the ISV, start the engine - then feel the ISV

stop the engine, reconnect it, then restart and feel the ISV - you should feel a difference


my dodgy idle was simply a dirty terminal/switch on the ISV temp sender

[forzanerazzurri]

my isv is working properly,  i unscrewed the idle screw and cleaned it out a bit then screwed it back in and it ran a little better now my idle is fine until the engine warms up then it does it again,  maybe i should clean out my throttle body?? in behind the idle screw as i saw lots of oil on the end of the screw when i unscrewed it?

[richy]

I had rough Idle and misfiring (when warm) - replaced temp sensor and is smooth as a baby through a blender now.  
Engine was getting too rich a fuel-air mixture when warm

[forzanerazzurri]

hmm mines not misfiring i dont think?  but how much does a temp sensor go for and where does it go? how easy is the install?

[richy]

Got mine fixed under warranty.  Afraid I don't know much about fitting em, but think they're pretty cheap (~20 squid(?)).  As I said, was done under warranty so not sure of price.  Sorry!

[Veedubgt18v]

temp sender is about 12 quid i think it is the blue one on the union on the front of the block. hold up and i will post a link for you about idling.....

[Veedubgt18v]

try this.......

http://www.btinternet.com/~gvk_motorsport/diduphart.html


as well as cleaning the idle screw, check the gasket on the throttle body and all the vacuum hoses, get some carb cleaner and clean the throttle body and inlet manifold aswell, cant hurt! also make sure there are no air leaks from any rubber hoses and that your breather on the rocker cover is fitted correctly

[forzanerazzurri]

thanks   a bunch for the info,  will this still work even tho my 8 v isnt Digifant ( i dont think)  hmm blue plug,  is there any way you can get a picture of this ?

[Veedubgt18v]

hold on i will see if i can find this picture blue posted.........

im not sure if it will work if it isnt digifant, cant hurt to try?