Quote:
I've lost spark in the Fury. It's got FAST efi which also controls the spark.
Lean burn dizzy connects to the ECU
ECU uses the white trigger wire to talk to the MSD
MSD fires an accel supercoil
I have power to the MSD box and the ECU during both start and run (verified)
When I use my test light on the white trigger wire, I hear either the pickup or the coil making noise and a test spark plug will arc. I get no spark cranking the engine over or when I release the key to the run pos.
Since I get spark to the plug when I ground the trigger circuit, is it safe to assume the problem is in the trigger portion of the circuit (i.e. when I short the trigger the MSD box, coil, wires seem to do their jobs).
If so, how do I test the guts of the dizzy?
If grounding the coil causes the plug to fire, you definitely have an issue with the primary side. If you have a scope, putting the probe on the distributor trigger wire and look for the pulses. Without one, check DC resistance for the 150-900 ohms on the reluctor pickup coil. After that, you are reduced to substituting parts. My guess and only a guess is the MSD box.
Craig
2014 Ram 1500 Laramie, 73 Cuda
Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango
Only previous Non-Mopar: Schwinn Tornado
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