Chrysler Repair: No spark, no start: Daytona 1990, accuracy check, hall effect sensor

Question
wont start no spark at plug change coil change distibutor still wont start  

Answer
Hi Daniel,
I suspect the Hall effect sensor in the distributor has failed. You can do two things: measure the voltage at the coil + post as compared to ground while a helper cranks the engine. If it shows 12V for a second or so and then drops away, during a 5 second crank, then that is a suspicious sign of such a failure. But then do a readout for fault codes: use the ignition key, turn it "on-off-on-off-on and leave on" doing that is 5 seconds or less. Then watch the check engine light (or power loss light) to begin to flash, pause, flash, pause, etc. Count the number of flashes before each pause. Then repeat for accuracy check. Then group the numbers in pairs in the order they came out to form 2-digit numbers. The last number will be 55 which means end of readout. If you get an 11 that is the code for the sensor failed or its wiring. Chances are it is the sensor.
If you don't see 12V at the + post for 1 second then I would try the autoshutdown relay by swapping it with another relay with the same part number, as being your problem.
To change the sensor, merely open the distributor cap, remove the rotor and the plate, and replace the sensor with a new one. They cost around $40.
Let me know if this doesn't lead to the answer.
Roland