Hey guys. I'm getting four codes on the GT.
P0102 - MAF
P0443 - EVAP Emission Control System Purge Valve
P0135 - O2 sensor (Bank 1, sensor 1)
P0141 - O2 sensor (Bank 1, sensor 2)
Car runs pretty well but during deceleration from about 60 mph down through 40 mph the rpms will drop to about 700 then surge back up to about 1500. It does this repeatedly until I get below 40 mph.
I had a mechanic friend of mine put his scanner on it and discovered the MAF reads 0... not working at all. Downstream O2 sensor was giving a reading but didn't look like it was working properly. I'm wondering if the non-functioning MAF could be causing the O2 sensor readings? I've pulled and thoroughly cleaned both O2 sensors but haven't cleared the codes yet. Car still runs the same.
And as for the EVAP code, I have no idea. Swapped the purge valve solenoid with one I pulled out of a yard just to see. No change. Been reading a lot on here about leaks in the EVAP system but most of those seem to be in reference to P0455, which I'm not getting.
Any ideas?
