1990 Chevy Truck Wont Start

[quote:e899926af3="James Boyles"]Engine Mechanical problem
1990 Chevy Truck V8 Four Wheel Drive Automatic 115000 miles

Hi guys,
I have a 1990 Chevy pickup with a 350 in it. The truck has been setting in my garage for approx 5 years. Recently I replaced the fuel tank, the sending unit fuel pump in the tank all the fuel lines etc...

I could not get 12 volts to the new fuel pump, i found a wiring hireness problem repaired it and the vehicle started. I let the truck sit for 2 days, went out to start it and now it wont start. If i put some gas down the carb, the truck starts and will stay running.

Could it be possible that the throttle positioning sensor is bad?

Thanks,[/quote:e899926af3]

Hello,

Is your check engine light on? If so pull codes...

Could be the IAC or the TPS could also be fuel pressure regulator...

Check fuel pressure.....