It nearly stalled while moving through the parking lot at a slow speed after start up.
Is ok when driving at 45 mph and above.
I had Advance run codes on it and found a code 27 indicating 3rd gear switch problem. It doesn't make sense to me however. I know the code points to the valve body of the transmission.
I have changed the O2 sensor and plugs.
Could it be the coil pack? Plug wires? Transmission?
any ideas