When I hit "hard acceleration" to pass another auto, my car sputters and cuts out. I have changed everything and had it at the chevy dealer with no results. What could be causing the problem?
I have had the plugs, coils, plug wires and filters changed. The chevy dealer put a new harness that goes down the back of the engine, in front of the firewall. I had the catalytic converter checked out and nothing seems to help. I have had it hooked up to the computer analysis machine and it shows good. It still misses and cuts out when I hard accelerate.