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Spray some starting fluid into the intake and try to start it. If it fires up for a few seconds then you have a fuel problem and is most likely the fuel pump. If it does not fire up at all then you are getting no spark to your spark plugs and the 1st place I would start with that is the ignition coil.
if the spark plugs are still firing it could be either fuel problems, if its fuel injected check that the injectors are pulsating, use a voltmeter on them and should be about 3v. may need to use a compression tester with the spark plug out to see if there is any compression left aswell.
Insofar as your Ignition Wiring Diagram, I hope you're speaking of what's also called the Spark Plug Cables or Firing Order. The proper Firing order for your V-6 is 1-5-3-6-2-4 with the number 1 cylinder being the front spark plug on the left hand side. The left hand side is Odd numbered and the Right hand side is Even numbered, therefore number 2 cylinder is the 1st plug on the right hand side of the engine.
check high voltage wires for cracks,chafing or melting, also replace the plug. try turning the engine over with a known good plug connected but not installed in the cylinder to confirm no spark. if there is spark but you still have a missfire, then you have a dead cylinder. if no spark, its the coil or coil module. replace plugs and wires 1st. its cheap compaired to sensors and modules
The mechanic should check on the distributor assembly and the spark plug ,spark plug cable. You should set first the distributor shaft rotate it counter clock wise or clock wise . according to the way you will set the spark plug to connect on the distributor assembly. If the timing will be 1342 there for the timing on the shaft should be set at the 1st spark plug and spark plug cable. When you hit the gas pedal it will back fire because of the distributor assembly and the spark plug is not set on timing or proper timing for compression.
If you have fuel, replace the coil plate, you fried the diode in the coil plate causing it to not fire to test you need a spark plug detector light to see if your getting spark. If you just disconnect the wire and test it like the old spark plug system you will fry the coil or the diode in the plate, I forget what ford calls it, GM calls it a firing diode?? I think rusty memory.
U need to check for spark 1st. Pull a plug (or use a good spare plug) place plug where u can see it, have someone crank the engine, watch for spark at plug tip, do this out of the bright sunlight so u can see the spark easily. If good spark, after several starting attempts, pull a plug and check for fuel on plug. Check these 2 items 1st, let me know what u find.
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