Chrysler Repair: LHS stalls, power steering pump, diagnostic capability

Question
HI.  I have a 1994 LHS.  within the last year we have had the trans rebuilt,some electrical problem fixed--(something under the front quarterpanel) new power steering pump, battery, brake work, full tune-up, etc.  Just about everything you can imagine. It has 180,000 miles on it and stalls constantly.  At first it seemed to only stall when going over 60 mph and after running for awhile (1/2 hour)so, I stayed close to home and took the back roads (under 40 mph.)  Now it won't even go a mile without stalling.  Some times it starts right up, sometimes it takes a few tries.  Sometimes I can put it in nuetral(while rolling) and it starts, other times it has to sit awhile. When it stalls there is no warning, it just goes. All power (radio,lights,windows) is still on. My check engine light has been on since the trans-rebuilding.  A few times when stalling it acts like it not sure it wants to and "jerks" on and off (stalls and restarts,stalls and restarts).  It has been to a garage and they say that they can find nothing wrong with it.  Please help. I love my car but am sick of dumping money into and can't afford to replace it right now.   THANKS.  Donna

Answer
Hi Donna,
One of the first things to do is to take advantage of the on-board diagnostic capability of the engine control system. Electrical and some vacuum related problems can be detected by it and stored in its memory for later readout.
The most useful thing to do would be to try to get the fault codes that may stored in the engine controller memory to readout. Try using the ignition key: turn it "on-off-on-off-on" and leave it "on" (doing this quickly, no longer than 5 seconds). By "on" I mean just the normal position when the engine is running, not the cranking position. The 'check engine'light will remain on when you leave the key in the "on" position with the engine still not running. But then watch the 'check engine' light to begin flashing, then pause, flashing, pause, etc. Count the number of flashes before each pause and keep track of the numbers. Repeat the readout and verify the counts are correct. Then group them in pairs in the order that they came out, thus forming two digit numbers. You may notice that the pause is shorter between the digits of a given number, and longer between the numbers themselves. Then send me a 'follow-up' question telling me the results of your readout. By the way, 55 will be the last number (two groups of 5 flashes each) and that is the code for "end of readout".
I have the troubleshooting manual for several engines and we can look up the possibilities of what is wrong based upon what fault codes you show. When you write back tell me what size engine is in the LHS you are driving.
There is also an essay on fault codes at the site:
http://www.allpar.com/fix/codes.html
which gives the meaning of the code numbers. But then you need to get specific info for what exactly might be the diagnostic tests or parts to replace to complete the repair.
There are some parts too that can cause stalling but won't be self-detected by the controller, but before getting into that let's try the ignition key.
Roland