problems restarting 20v from hot

[lizard]

I have an 89 20v 7a Coupe quattro which has a quite annoying problem of late. starts fine from cold and even from hot if it hasnt been sat for more than a minute or two but if I get it fully warmed up and then leave it for 10 minutes it will not restart. fuel pump comes on, cranks over fast enough but just wont fire, not even a slight cough. it seems like some kind of heat soak problem. seems to be ok again after the fan has stopped or a short while after that and opening the bonnet seems to shorten the time before it will restart. anyone experienced this before?

cheers, jon

[scotty33]

Next time it happens, try checking whether there is a spark, if not, a hall sender problem would seem likely.
If there is a spark, maybe you have leaky injectors? Probably worth checking the hoses on the intake for vacuum leaks.
20v owners need to know about:

http://www.20v.org/problem.htm

The SJM site is full of good info, but you have to pick out the relevant bits, the 7A is not covered, but it shares a lot of 3B technology.

http://www.sjmautotechnik.com/troubl...g/trouble.html

My car cranks longer when hot but stood for a while, always starts ok.