[CREWZIN]

Don't know if this will help you guys but I found this on PT Do-It-Yourself.net ..........

I have a 2001 LE PT with 14ok miles. Prior to the current issue (about 2 months ago) I changed the plugs, wires and ignition control. This seemed to stop all the problems we had at that time. Yesterday while driving at 40mph in the city, the car seemed to lose all of its get up and go. It just lost power all of a sudden; I thought we were going to stall right in the middle of traffic. I pressed the gas pedal to the floor and kept it there. Eventually the car seemed to respond. When we stopped at a traffic light it seemed to run a little rough, but later that also smoothed out. The same loss of power happened again later that night and my wife experienced the same problem the next day on her way to work. We stopped at Auto Zone and had them check the codes which were P0351, P0401, P0300 and P0420. – Ronald, from Missouri.

You have a variety of faults occurring at the same time. I suspect that at least two are related however without physical access to the vehicle and additional troubleshooting with a DRB scan tool and diagnostic manual that is only a guess. For instance, a P0300 and P0351 DTC can be caused by an EGR issue (P0401).

P0401 - EGR System Failure - Required change in air/fuel ration not detected during diagnostic test.

P0300 - Multiple Cylinder Misfire

P0351 - Ignition Coil Primary # 1 Circuit - Peak primary circuit current not achieved with maximum dwell time. Possible causes include:

Ignition Coil
ASD Relay Output Circuit
Ignition Coil Driver Circuit Open
Coil Control Circuit Shorted To Ground
PCM

P0420 - 1/1 Catalytic Converter Efficiency - Catalyst 1/1 efficiency below required level. (This fault can also occur when you have a new upstream 02 sensor and a aging downstream sensor.)

Additional troubleshooting will be required to isolate the issue.