Cold start great, warm starts hard

[That]

My 82 fiat spider 2000 starts great in cold weather. But, when temp gets 60 + , it is hard to start. Have to fiddle with gas pedal several times to get it started. After it warms up, all ok. I played 'mechanic' awhile back, trying to adjust idle speed and suspect my efforts might have caused this problem. I adjusted the idle mixture as well as idle speed screw. Could I have a too rich mixture? If so, which way do I turn screw to correct it?

[RRoller123]

Could be the AAV or Coolant Temp Sensor, or any number of things.

Best to get one of the various Bosch L-Jetronic FI manuals that are available and work through it. It is much easier than it appears!

Brad Artigue’s FI Guide is excellent, and is contained in his book; “Maintaining The Italian Roadster”.

For those interested in further studying the Bosch L-Jetronic system, there is an amazing amount of quality material available on the web. All these references below come up with a Google search on the term: “Bosch L-Jetronic”

This link from the BMW folks has a very good PowerPoint type presentation on the components, etc.

http://www.firstfives.org/faq/ljet/jetronic.pdf

This one, from the VW folks, has a good component description too, but also a good trouble shooting manual:

https://www.type4.org/manuals/ljet/

Here is Bosch's own manual, a long, detailed slog through the swamp for sure. Probably best printed out for studying. I think it is the best of the bunch for a complete in depth study of the system, as it includes selected engineering design data, explaining some of the design decisions they made.

http://foxed.ca/rx7manual/manuals/BOSCH ... Manual.pdf