Chrysler Repair: 1993 new yorker bucking, exhaust gas recirculation valve, egr solenoid

Question
my 16 year old daughter says that her 93 new yorker has on 3 or 4 different occasions  started to violently "buck" ,her choice of words. she says she shuts off the car and restarts and the bucking quits. ive driven her car and have had no problems. i think the problem is with the transmission, but im not sure. her check engine light is on, so i ran her codes and the codes i got were 12 and 32. can you tell me what those codes mean, and any other help will be appreciated.

mark

Answer
Hi Mark,
Good idea to get the fault code readout.
The 12 code means that the battery connection to the engine controller was disconnected within the past 50-100 key off-on cycles. If you haven't disconnected the battery recently, then that might well indicate a bad connection at one of the battery clamps, or a poor ground connection of the - post wire at to the engine or body grounding points of that wire. So trace all the wires on the - clamp to see if any of the attachments are loose.
The 32 code means that the exhaust gas recirculation valve's electrical solenoid, or its wiring or vacuum connection is not working properly, and it also might mean the egr valve proper is sticky in its mechanical function (not closing when at idle for example, or at full thottle). So you would do well to look over the electrical connection at the egr solenoid (located near the egr and connected via a vacuum hose), the vacuum connection at the egr, and then try to move the egr valve via a flat blade screwdriver inserted in the slot in the valve stem that is centered in the "saddle" or mushroom shaped shroud on the valve. That stem should move freely when levered in and out, albeit with pressure against a return closure spring action. If it seems sticky, spray some penetrating lubricant on the stem where is enters the valve proper. You didn't say which engine she has in the car but the egr valve is in the pipe that runs from the exhaust manifold back to the intake manifold. If it is not moving freely or is sticking slightly ajar that will cause the engine to die whenever it is at closed throttle (also a sort of 'bucking' if the car is coasting).
So look into those possibilities before considering the transmission as the cause. Besides, these items would be much less expensively repaired if they were the cause!
Roland