92 Buick Skylark 3.3L is chugging/choking at any time, but mostly from
a dead stop or around the 40-43 mph (lacks power after torque
converter engages) but it doesn't happen when changing gears. Its a 3
speed automatic. After third gear, rpms drop to 1500 (normal), then it
chokes a bit, and sounds like it runs a little rough when accelerating
up a slight incline.
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?