95 Festiva won't start on hot days

[walterthomas]

We have a 1995 Festiva with the 1.3L EFI engine.

On real hot days we ocassionally are unable to restart the engine after it has been driven for a while then parked for anywhere from 10 minutes to a couple of hours.

If we leave it long enough (presumably to cool down) it eventually starts.

Today this happened. We had driven for half hour and it has been a particularly hot day. When we tried to restart after an hour parked in the shade it started for just a second then died. I tried to start then tried cooling the inlet area and fuel lines with a watering can. I tried to start it every minutes until the NRMA arrived about 2 hours later and as it started for them (of course ) and they left.

I thought it might be some sort of fuel vapourisation problem but cooling the system with cold water didn't help.

Anybody experienced this problem might have any idea how I can DIY fix this problem?

Thank you.