Rough cold start, Rougher hot start Options

[Canine14]

Hello 914world,

This is my first thread on the forum, thanks for having me!

I have a diagnostic question concerning a 1973 914 2.0:

The engine starts but won't idle without a decent amount of pressure on the gas pedal. after about 3 to 5 minutes the gas pedal can be released and the engine idles fine.

After traveling about ten miles or 15 to 20 minutes, I can shut off the engine and turn it back on immediately without any problems. But if the engine sits for say 10 minutes after being run for those 20 minutes, then upon restart the engine will not idle without a significant amount of gas pedal pressure. It will actually run even worse than when started cold, almost as if the engine is running on 2 or 3 cylinders.

The engine will not run well again until it completely cools, the engine is started and the gas is depressed for 3-5 minutes as stated above.

I appreciate questions or ideas on what might be happening.

thankyou!