Only when it rains??

[02CamaroinCali]

I have a 02 1LE Camaro SS, mac mid-length headers, and a cutout. Every time it rains I get misfires down the entire left side. After a good rain it continues for about a week then goes away. I have taken it to the dealer a couple of times only to be told I needed a fuel additive, which i tried to no avail. I have changed the plugs, wires, Idle Air Controller, fuel filter, checked for vacuum leaks, and tapped on the computer with the back of a screwdriver to check for loose wires. Does anyone have any other suggestions? This is driving me nuts, any help would be appreciated.

Thanks

Brandon

[jsteele90]

sounds like maybe your 02 sensors are getting wet

[EnfuegoZ28]

When it is running good try unplugging one sensor at a time or one coil at a time and see if you can recreate the problem. If that doesn't work then try getting the car wet and see if you can spot what is getting wet.