Ok I have a 83 mustang gt 5.0 (ho ?). Just got the car from some young adult that put new carb. and a few other thing on it and it started a little fire under the hood. Damage to the outside of the carb. and few wires. I have put a new duraspark, coil and distributor. Things I've done ground coil wire to body chassis, Looks like red/brown wire to the + coil (12 volt source with key on). Things in question on main wires (red/brown use on + coil) green not used, tan/red used on the oil pressure unit, I have white/black and a black wire from the alternator not used. I have put the motor up on tdc and ran both firing orders started with 1-5-4-2-6-3-7-8 nothing then ran 1-3-7-2-6-5-4-8 and nothing. All vacuum port on the back of the manifold are block off. I have no clue where these ports go. I rebuild and drag race a 600 hp pontiac. This is my first ford touched. What is happening is motor is turning over but no spark to the plugs. Please help!!!
83 mustang not firing
- Thread starter quadsloco
- Start date
txstang84
15 Year Member
ok, it sounds like your duraspark isn't getting power.
provided that no one has swapped the cam in your car, the '83 5.0 will have the H.O. firing order (1-3-7-2-6-5-4-8).
Now, I'm looking at my wiring diagram for an '83 5.0, and it shows:
power wires to duraspark from chassis harness: red/lt grn goes to wht/lt blu; red/lt blu goes to wht on duraspark side of harness (make sense?)
duraspark to dizzy: ppl/lt blue; org/yel; blk lt grn
duraspark to coil: dk grn/yel to (-) side of coil which also splices to tach lead-bottom line, this must be connected to coil
coil should have red/green (same wire to duraspark power) to (+) side
incidentally, the red/grn wire to + side of coil is showing a resistance wire between duraspark and coil (to keep coil from frying)
hope this helps...
provided that no one has swapped the cam in your car, the '83 5.0 will have the H.O. firing order (1-3-7-2-6-5-4-8).
Now, I'm looking at my wiring diagram for an '83 5.0, and it shows:
power wires to duraspark from chassis harness: red/lt grn goes to wht/lt blu; red/lt blu goes to wht on duraspark side of harness (make sense?)
duraspark to dizzy: ppl/lt blue; org/yel; blk lt grn
duraspark to coil: dk grn/yel to (-) side of coil which also splices to tach lead-bottom line, this must be connected to coil
coil should have red/green (same wire to duraspark power) to (+) side
incidentally, the red/grn wire to + side of coil is showing a resistance wire between duraspark and coil (to keep coil from frying)
hope this helps...
txstang84
15 Year Member
I miss my 83 5.0 
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