Hi guys!
I have a 1997 Z28 with 88K on the clock.
Please Note! All my parts are AC Delco. I have changed Air check valves, O2 sensors, plugs and wires, optispark, EGR Valve, Map Sensor, and fuel pressure regulator and New AC Delco Fuel Pump.
I changed all 8 fuel injectors to Delphi 24lbs injectors. I cleaned and installed all new gaskets in the throttle body. I also cleaned the Mass Airflow sensor.
I checked the BLM on both sides of the motor and they are at 160
I swear I don't know what to do. I thought changing the Air Check Valve, since they were bad would fix the problem but it did not.
I have a sound file with it popping in the exhaust and of how the valves sound.
Can someone host it for me?
Based on the sound of the file do you think it is internal?
Thanks Lee!

I have a 1997 Z28 with 88K on the clock.
Please Note! All my parts are AC Delco. I have changed Air check valves, O2 sensors, plugs and wires, optispark, EGR Valve, Map Sensor, and fuel pressure regulator and New AC Delco Fuel Pump.
I changed all 8 fuel injectors to Delphi 24lbs injectors. I cleaned and installed all new gaskets in the throttle body. I also cleaned the Mass Airflow sensor.
I checked the BLM on both sides of the motor and they are at 160
I swear I don't know what to do. I thought changing the Air Check Valve, since they were bad would fix the problem but it did not.
I have a sound file with it popping in the exhaust and of how the valves sound.
Can someone host it for me?
Based on the sound of the file do you think it is internal?
Thanks Lee!

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