96 Chevy express 1500 V8-305. Have a P0305 code…Misfire on 5. Let me tell you everything I have done so nobody wastes their time.
I have, replaced the entire ignition system, “EVERYTHING” including a new distributor…Not the problem… I did a compression test…Not the problem…injector cleaning…not the problem.
When I moved the wire harness that goes into the “spyder” fuel injector system the engine smoothed out. I untaped the harness from around the plug and applied pressure to each wire the engine smoothed out. The back row 2nd pink wire seems to cause the most reaction.
My question is…Is it the wire harness or is it the injector system not reading plug? or could it be a combination of the 2? If I replace the wire harness might I still have to replace the injector system?