does any one know how to clear a 43"fuel supply system. its a LS in a 91 si. i know its just not my car cuz my freinds have this same problem.

 

Define "clear"...

Do you mean cleaning out the system???

Cause if that is what you mean, all you have to do is take an air compressor with an air attachment and blow through the fuel fitting in the engine bay side to the fitting that goes into the gas tank... just make sure you disconnect the fittings and place the end into a gatorade bottle or jerry can!!! Works like a charm.

What sort of fuel delivery problmes are you having??? You should get a pressure gauge and check to see what psi you have going into the fuel filter.