hi every1 im new here i hav a mk3 cabby that has an s1 turbo engine in it basically when i bought it it wasn,t sparking so i wired in an xr3 dizzy and now it sparks but when i start it its runs for 3-5 secs and dies yesterday i held the key to keep it running then after a good few attempts it ran itself.i also noticed after it heated up it started to overfuel and i noticed it was overheating so i took the thermostat housing off to find no thermostat,i was told if there is no thermostat the temp sender will not be wrking rite and it'l make it overfuel.i disconnected the cold start valve 2 see if it wud strt without it but it wont fire but when i connect it it does for the 3-5 secs any ideas??maybe faulty cold start valve.im really pickled with the bugger so any replies wud be much appreciated cheers

 

6psi@271bhptry putting a thermostat in as you said temp sensor wont be working and making it overfuell

26psi@271bhp

 

As above start with what you know is wrong, and check the voltage at the coil.
tabetha

 

i have replaced it but now its back to the starting problem again it keeps cutting out after 3-5 secs could the cold strt valve be faulty and can u clean them.i'v read up that sum people hav disconnected there's and they run fine but i tried it and it wouldn't offer to start

 

The fact that yours starts with idle valve and doesn't with it disconnected shows the valve to be functional, it will start without it but for cold starts you need to compensate by using throttle for a moment though. Can you keep the car going by using throttle, if so it shows the base idle is to low.

Do the revs drop then it stops? Normally they jam open and you have the opposite a high idle and that's why you need to clean and lube them.

Martin

 

i got it running but now it revs up and down then its fine wen its hot but after a while it starts to overfuel and reak black out the exhaust

 

Check CO.

Martin

 

where is that located can you clean it or just replace it

 

CO as in the exhaust content shown as a percentage, if this is wrong it will throw everything off the scale, you need an exhuast gas analyzer but as you most likely along with most won't have only option is to take it into MOT station and get it checked, they may even charge a small fee if mean!

Martin

 

o yeh i did get told about that but the car hasnt ran for years and its a conversion so its prob needin everythin set up

 

does that not just control the spark

 

That is what produces the spark and a fundamental component, what his saying is check you are getting the correct voltage at the live terminal.

Martin