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
Could be a lot of things. Do the usual: check, clean, and/or replace: TPS IAC MAT MAF Throttle body Plug wires (check them while they are HOT! - not over 8k)
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Glad it worked out for you. You are very thorough. I usually just stick the sucker hose from my sprayer into a can of xylene and blast everything with the air compressor. Takes off carbon, paint, dirt, and everything. I never thought about taking off the battery cable. That might be a good idea. Paul.
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