Join Date: Sep 2006
Induct: Turbo + Nitrous
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Re: '84 rampage no spark
You can check the ignition primary circuit by jumping the HEP (Hall effect position switch) commonly referred to as a pick up switch, because it ďpicks upĒ the ignition pulse produced by the Spinning oil pump drive, via the dizzy.
Disconnect the dizzy and check for power and ground.
Use a piece of wire, or a jumper wire.
When you jump the 5v ref to ground the coil should fire.
If no spark occurs, you must first ensure circuit continuity and connector condition.
Ohm our the circuits, if you find high resistance in the circuits, inspect for corrosion at connections, broken, split or damage to wires.
Loose connections should be cleaned and adjusted for spread pins or connectors.
As a certified tech, experienced with FWD mopars for 25years, Iíve seen way to many electrical problems with spread connectors due to probe damage.
This may sound crazy, but I often prefer the intrusive method of circuit testing.
I pierce the wire, test, then seal the wire probe point with nail polish or sealer (flex seal works great).
Iím sure I may get blown up here, but this method works, and it prevents probe damage at the delicate connectors.
I would ensure your ground wires all have good connections, also ensure your ground strap at the engine side mount is securely attached.
There is one on the bottom of the intake (dr side)
Rear front edge of head next to main engine harness, should be a few grounds, depending on options, and then grounds near PCM,
Probably would be a bad idea to disconnect the ( 8-12 pin connector, behind the battery and check carefully for pull outs or missing insulation.
Mopar had a bad habit of leaving bare wire exposed at the connectors, once they get hot, or disturbed, they tend to mash down and sometimes short across circuits, this could be whatís going on?
Do a wiggle test while you have-someone crank the motor.
Wiggle and manipulate the harness around the dizzy and back of battery, actually you may want to wiggle various connectors in the effected circuits!
Hope this helps
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