I have an issue starting the car if I just run it for a short period of time - engine doesn't get warmed up. Example, starts up in garage back it out and shut it off. it wont start again unless you let it sit for 4-5 hours, turns over, won't fire. Runs great other than that - thought it was fuel cap as there alway seems to be pressure when you release it - should there be pressure all of the time?

 

welcome to the board.

well, you're not really supposed to do that. once you start it cold, you're supposed to let it warm up before shutting it down. now, some cars seem to require this, while others don't but it's something to keep in mind especially since it appears that your needs to be warm.

https://www.rx7club.com/2nd-generati...engine-604886/

for your pressurized tank question, make sure nothing is blocking the vent line/hose.