zvh on cossie managment
any ideas,the car revs really good when you give it some , but on idle the revs drop off and cuts out ,its so annoying,then when you turn it over it takes about 10 seconds to fire up,i have checked out some basics any ideas
cheers

 

idle speed control valve or air leak by sounds of things

 

could it be worth checking the timing?

 

the timing is spot on ,i will double check the idle control,and have a nother look for air leaks

 

have you had the car running before? or have you just built it up with cossy management? do you have a lambda?

At the moment it sounds as if the fueling needs setting up.

But if it was running fine before i would suspect a sensor,

maybe water or air. etc. Because it runs fine at WOT?

Rob,

 

sorry i just read that properly, if it only cuts out on idle?.... then ISCV it probably is.

Rob,

 

still no luck,took the cold start valve off and also listened for air leaks and the revs still drop off on tick over,what would you check next
cheers

 

hummm

Are all the plugs ok and everything ok in dizzy cap?

if the fueling is out it can effect idle and start too especially when running rich

 

did you check the iscv? unplug it and see what happens.

Was the car working fine in the past?

 

As said check ISCV if car runs fine when up to temp then it will almost certainly be this, if still the same when hot then it won't be this.

Martin

 

still no joy, the car will sometimes starts, then you rev it up no problem,then when you take your foot off the peddle the engine revs drop off and its cuts out,then with a bit of luck,then it will fire up again after you keep putting your foot on the throttle for about 10 seconds,could it be the map sensor on the blink giving the wrong singles if so how can you check weather its working or not ,because when you pull the connector off the engine will cut out,its just a thourght, or any other ideas ,good spark,fuel, no air leaks and nothing to do with that cold start valve. cheers ,ray

 

have you tried to alter the stop position of the throttle butterfly?
may only need a little adjustment.

 

i was going to try that ,but buy alertring a bit ,does it change anyother setting

 

You say its nothing to do with the cold start valve but what about the iscv there 2 differant things

mark.

 

its not the iscv, but what do you mean the other cold start valve
cheers

 

altering base setting may change the running a little, but there should be a way to set the tps again.
probably best to alter the base throttle position and take it back to where it's been mapped already to get it adjusted accordingly.

 

won't have a cold start valve on efi will it?

 

/\ shouldn't do, management should just inject more fuel into engine and open idle control valve a little.

 

help
the car started this morning after about 4 seconds,but it should start as soon as you turn the key, any how it dont seam to run smooth when putting your foot the throttle ,when i took my foot off the throttle the engione revs dropped and the engine cut out and would not start again, what would you try next, cheers

 

raycov where abouts are you?

 

have you checked for vacuum pipes off or split?
sound like an air leak somewhere.

 

i live in coventry
studabear

 

whats happened now is that it will not start,it splutters and farts about but will not have it,good fuel good spark,cannot see any air leaks,remember i am running cossie managment
help
cheers
ray

 

only thing that makes and engine work is fuel and a spark, it just needs to be in the right order and quantity, best thing to do is get it to a specialist to look at the peramiters on the mapping and set it up again. you may have a duff sensor throwing a bad signal to the ecu, bar spending a lot of cash replacing them all i would get it checked profesionaly.