Hey guys. My 91 3.9l tbi starts up, idles rough and will stall unless I keep goosing the pedal. Its showing fault code 42 - automatic shutdown related driver circuit. I hear the fuel pump run when I key the ignition. Is this relay connected to a rollover switch, the fuel pump, or ?. Love first gens, this is my third and the first with a problem that has me stumped. Any help is greatly appreciated.

 

Last time it had a tune-up? Fuel pressure? Welcome to DF!

 

42 Fuel pump relay control ckt, Auto shutdown relay control ckt, No ASD relay output voltage at PCM, Fuel level sending unit volts out of range, Fuel level unit No change over miles
This code could be different things. Checking the fuel pressure would be a start.