I have a 97 C1500 5.7L pickup truck. It will ruin great sometimes. Other times it will start and run for a while then cut off. Sometimes it will start but idles at 500 rpm. I have replaced fuel filter, crankshaft and camshaft sensor. Plugs and wires were changed and fuel filter had been changed. Any suggestions about what is going on or how to fix it?

 

Try checking the fuel pressure. Might be the fuel pump.

 

Was hoping that wasn't going to be the suggestion. But thanks for the reply.