It's in an off road buggy, MSD fuel pump (2255 I think?), very short run of line from the tank to the engine, probably 3 feet total. Sometimes when the engine gets hot it won't return fuel to the tank, what we think is it is vapor locking in the fuel rail or something.

Sound common? A guy told me to get an aftermarket fuel regulator and it should fix the problem, although I don't see why it would, hot fuel is hot fuel no matter what reg it goes through.

Any good way to keep it cool? I guess the engine does not get enough airflow, I am thinking of mounting a fan directly over top of the intake to blow air down on top of it.

Thanks for info.

 

And what is the thing right beside the regulator on the fuel rail (the inlet port), is there anything to it that may cause a problem?

I need this setup to be bombproof, not getting fuel in the middle of a race would not be good...

 

any ideas?