Thanks for helping out flipklos.

I *think* I've done a pretty good job searching for vacuum leaks. I replaced a few lines and tested as many as I could find. In addition to basic testing I've tried unhooking just about every vacuum line from the vacuum tree and the only one that really makes a difference is the one to the fuel pressure regulator.

I can keep the van running forever by feathering the gas pedal. It seems (after my testing last night), that can also keep it running indefinitely by spraying carb cleaner into the intake through a vacuum hose.

Thanks again,

Eric