I am posting this for a friend since he has tried other boards and had no luck in solving this. The car a 97 V6 Camaro (silver in color if that helps
has a stumbling problem that occurs at about 3/4 throttle. He has replaced the coil packs (3) plugs & wires & O2 sensor twice. It doesnt happen all the time, but last time it did the ECM had stored these codes:
These are the codes that came up on the scanner last week. The O2 sensor
thing has been coming on and off for the last year and a half. I changed the O2
sensor but it didn't help. I don't know what the other one could be.
>
> P1441 Evaporative System Flow During Non-Purge
>
> P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
>
Anyone know what the p1441 code means? I wouldnt think the o2 would cause stumbling unless its running rich. Any info would be appreciated.

These are the codes that came up on the scanner last week. The O2 sensor
thing has been coming on and off for the last year and a half. I changed the O2
sensor but it didn't help. I don't know what the other one could be.
>
> P1441 Evaporative System Flow During Non-Purge
>
> P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
>
Anyone know what the p1441 code means? I wouldnt think the o2 would cause stumbling unless its running rich. Any info would be appreciated.