Chrysler Repair: engine willnot start after short trips, coolant temp, chrsler

Question
Hi,I have a 1994 Chrsler Grand Voyager with a stalling problem,I replaced the transmission 1500 kilomiters ago, and this problem started almost the very next day.The van will start evry time when cold,after 70 or 80 kilomiters,well warmed up it will stall at a light ,or when I need to slow down for traffic, or braking hard.I have too let the van cool off,for 5 to 10 minutes and it will start up again.I have noticed that when this happens the oil light comes on, and stays on till the engine cools off.I have replaced the coil pack,the wires,plugs,repaired some broken wires at the computer connection,also the muffler,and catilitic converter,as well as the fuel pump just this past Saterday Aug 30/05,and still the problem is still here.Would you have any idea.

Answer
Hi Richard,
It might be that the coolant temp sensor or the intake manifold sensor (if your engine has one) is not responding properly or disconnected.
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 engine 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.
Roland