75 1.8 won't start when warm Options

[loghome1814]

I have a 1975 914 1.8 that turns on from cold and runs great, until I turn the key off, then it won't restart. I will turn, start and immediately die. It will do this twice then it will only crank. Is it possible the ignition switch is cracked or going bad. Any ideas why it won't start. I have replaced the following:
points
plugs & wires
dist. cap & rotor
Condenser

When it is running from first start of the day, it runs smooth and strong. Also, if I let it cool down for a couple of hours it will start most of the time.

[Tom]

My 76 2.0 has somewhat the same problem sometimes. It is D-jet, but both injection systems use a temp sensor in the head to adjust fuel mixtures depending on engine heat. Problem comes up because the aluminum head cools off quicker than the cylinders and the temp sensor sends a need for richer mixture because engine is cool. Actually the engine is warm and the rich mixture makes it hard to start. Try this, next time before cranking the engine after warmed up and turned off, fully depress the throttle before turning on the key. Keep it down and crank. If it starts and keeps running, then you will know it was getting a rich mixture. I don't know how the L-jet throttle works, but on D-jet as you depress the throttle, the ECU sends an extra "shot" of fuel to the cylinders thru the injectors, that's why you need to depress the throttle before turning on the key. Hopefully the L-jet works similar. This was from a thread I posted a few years ago and Brad Anders answered it for me. It works for me on my D-jet. If you want ot search, it was titled something like " hard to start when warm".
Also, in the owners manual, it says to fully depress the throttle to start.
Hope this will help,
Tom