how doi check for injector plus in cyl 3

Question

I have 2000 chevy selverto with p0303 code spark check ok replaced spider I think I have open in harness how do I check

Answer 1

Hi there,

This requires a special tool called a noid light. You plug this in to the connector at the injector and start the engine. The light should flash rapidly, if it does, you have injector pulse. If not, then you have a wiring problem.