Chrysler Repair: 88 3.0L dies out., chrysler new yorker, yorker landau

Question
Hello Roland;
I have an '88 Chrysler New Yorker Landau and it keeps stalling.  I have put a new fuel filter and added fuel injection cleaner.  She seems to run well and then, for no reason, she just kind of fades away and then dies out.  If I leave it sit for a few minutes, it will start again.  However, if I am in traffic, I can't leave her sit, and end up running my battery down.  When I get a boost, she seems to run okay again.  Could it be the battery or the fuel pump?  Someone told me to listen for the sound of the fuel pump when I go to start it, and it doesn't seem to be making any noise.
Thanks for the help.
Gloria

Answer
Hi Gloria,
By 'listen for the fuel pump" we mean when you first turn the key to the 'run' position, before trying to start it. You should hear a humming sound coming from under the car at the rear where the fuel pump is hidden in the tank. It only lasts for about a second if things are OK. So when it stalls listen for that sound, but try it now so you know what is sounds like. I doubt that will be the cause of your stall.
I suspect however that you have a engine rotational position sensor that is failing when it gets hot, then recovers as the engine cools down. The way to prove that and to identify which of the two sensors is causing the problem is to use the ignition key, turning it "run-off-run-off-run" and leave it in the run position, doing that action in 5 seconds or less elapsed time. Then watch the check engine light, which remains 'on', to see it begin to flash, pause, flash, etc. Count the number of flashes before each pause, then repeat the process to be sure you have an accurate set of flash counts. Then write back and tell me the counts in the order that they appeared. The last two sets of counts are always 5 in each, which is the code 55 for "end of readout". The other flashes are then similarly grouped in pairs in the order of appearance to form the other fault code numbers, one of which will be a clue as to why you are stalling out. So tell me the results, and also tell me which size engine (L) you have in the car so I can tell you more specifically where to find the faulty sensor. That liter (L) number is usually shown on the top of the engine, and I believe it will be a 3.0L V-6 engine.
Roland
PS Thanks for the equally quick rating and kind remarks.