stevew

Well, I t'eed a guage into the fuel line right after the filter, and have pressure out the wazoo (which is a bad place to have pressure). 100 lbs with the return restricted, 40 lbs. without restriction. Seems to have adequate flow when the filter is unhooked. I'm thinking fuel injectors clogged. Any way to clean those things?

Thanks guys. Any chance I could have put the wires on the fuel pump backwards? Does it matter?

Bought this 82 280zx after a long absence from Z cars. L&S, car has been sitting for a year or two, ran fine for 5 minutes then began sputtering, lost power & etc. I knew it was a fuel issue because I could enrich the intake and it would smooth right out. Did all the standard things; dropped & cleaned fuel tank, cleaned pickup, blew out all lines, cleaned pump, changed filter, changed fuel pressure regulator, checked & cleaned MAF, fresh gas, but no change. Would crank and barely idle. Pump sounds & runs ok (seems to) & seems to build plenty of pressure, judging from lines being pulled loose & gas flying. The only thing that helps is to restrict the return line coming back off the fuel rail. Car smooths right out and is driveable, although not well. Any ideas?