Look at the boost/pressure sensor and take note of the numbers written on the top of it. All the numbers. Then write back what the numbers were.

You don't have one of those Waldo aftermarket fuel pumps, do you?

The Orange fpr solenoid? Not really. Except for hot starting(50 second period of time), when a ground is put on it, which in turn vents the vac line to atmosphere, it should not be doing you in. 99.9999 percent of the time it is de-energized and just acts as a path for maifold air pressure to the fpr. While idling, reach back there and pull the vac line off and feel for suction. If it sucks, its normal(queer sounding statement).

 

yeah i have a walbro 255 fuel pump... is that a problem here? um... by the queer comment do you mean pull the vac line off of the pressure sensor or the orange solenoid? cause i dont have the orange solenoid anymore.

 

I meant pull the line off the fuel pressure regulator. Its on the back of the engine. It can be reached. Been there done that.

Your problem is the Waldo fuel pump. Its overwhelming the fuel pressure regulator. You NEED to buy a aftermarket fuel pressure regulator. See RETEDS site. You could prove its the fuel pump by putting a pressure gauge on the fuel line and observing the fuel pressure. It should be around 40 at idle, in general.

Its almost certainly the fuel pump. I wouldn't bother looking at the fpr vacuum line. Try putting your old pump back on and see what happens.

 

damn this life.