I own a 1993 Chevrolet Silverado Ext. cab with a 5.7 tbi. My problem is that it barley wants to crank up and when it does it runs a while then just shuts off. No spitting or sputtering just shuts off. Also i changed out the Distributor, TPS, plugs, plug wires, Pcv Valve, Battery, and Starter. Still shuts off. actually it doesnt want to crank at all now. Also i tested my ignition module and its good. I love my truck it has 344,478 miles on it all was original up till the other day when i changed all of this at one time. Anyone that can help?.......Please

 

Is it getting gas? Fuel pump, fuel filter? I would check fuel pressure.

 

would it make the truck shut off like that? Its like driving and then while driving just turning the ignition off. The only things left that i know are the ignition switch and i guess the fuel pump.

 

When you say barely, do you mean the starter is weak or it turns over fine and it sounds like its barely gettin gas??

 

I've seen the ignition module cause this type problem more than anything else but it sounds like you've changed out or tested most of the ignition components. If the module is intermittent, it may test OK then fail later. Before throwing any more parts at it, you may want to systematically check for fuel, ignition and air. It takes all three to make it run. Good luck.