Fuel system issue when hot

[Whizbang]

Regarding my 82 Rally Rx7. She is rather modified, but the issue seems like something i "engineered"

So twice now, as I type stranded at work, I have had issues with the car starting and idling at extreme lean (17:1 and higher) AFR readings and basically being undriveable from how lean the car with throttle is applied.

This has happen only on very hot days, while the car was sitting in the sun. The last time the car ran fine after it cooled down. Ideally it should this time too.

Some things:

• opening the fuel cap did nothing
• running the fuel pumps, seperate or simulantously did nothing
• or running them for any length of time (minutes)
• getting the car to temp did nothing

also the pumps don't "sound" right either. This is all on a stock FB tank, feed to pumps into the spare tire (above tank). Return on the stock FB tank should suffice. Or at least not cause a LACK of fuel.

anyway, i want to burn this fucker to the ground.