[normanator1]

Having one heck of a problem getting a 1987 LTD Crown Victoria to run well. Everything but the wiring has been replaced with new or H/Perf. Distributor, ECM, Coil, Rotor, Cap, Plugs and Wires. She drops three to four cylinders off the parade and raster on the scope spiratically. It has gotten worse over time and is now consistent within a five minute period when monitoring. I'm doing resistance tests, voltage drop tests and power/ ground checks on every Ignition component. THE BIG QUESTION:
Pin 16 on the breakout box is the TFI Module Ignition Ground. This is an ECM isolated circuit. What is the resistance in this circuit to Battery Ground. I have printed off about 200 pages from an incomplete Ford EECIV manual and cannot find the value or it's contribution. ANY HELP OUT THERE? Thanks
Normanator
ASE MASTER X2

[decipha]

ignition is completely independent of the ecu

if you've replaced everything but the wiring then you've found your problem

make sure the distributor is grounded well