Well, first you can ignore anything Regina. No 240 came with that system.

The reason I asked about the codes is mostly to find out if you had 111 on both after a stall, which could indicate a problem with the power to the engine management such as fuse 6 not having a good connection and overheating a contact. When that occurs, if the voltage drops to zero there, the codes, and the computer's adapting (limp home map etc.) are all reset.

And for sure I wondered whether your term misfiring is the same as mine, because I don't often encounter that symptom on this car unless it hasn't had a recent tune up. That's a baseline for suspected ignition problems, but the wire I show in the photo is the CPS Crank Position Sensor - a known issue for intermittent and temp-sensitive stalling. It newness does not necessarily excuse it from being a suspect, either, and unfortunately it can be bad and not set a code or fail the sensor (mode 2) OBD test.

The ignition amplifier or power stage has a lot of critics for heat related failure, probably because it mounts on a heat sink. The only problem I ever had with one was solved by cleaning the contacts on its harness plug, and adding some silicone grease to exclude moisture, but those same things are done when a new one is installed.

The 231 does not seem important to your symptoms as it reports the ECU is running out of range to correct the mixture at cruising speed. I've managed to solve one persistent (I mean over months and months) 231 by replacing a leaky exhaust manifold gasket. But I asked how you are monitoring the battery voltage and charging performance, because a car will die after running just a surely from a dying battery as it would from some heat-sensitive component you might imagine. Are you sure you've fixed the alternator and battery system?

Testing the relay... are you sure you are doing these coil pull-in tests the same on each relay? There's a diode in series with one coil, making it imperative you observe polarity in your test. Maybe this diagram will help...






--
Art Benstein near Baltimore

Children seldom misquote you. In fact, they usually repeat word for word what you shouldn't have said.