1983 f150 351w distributor cap placement

If the spark plug wiring is not correct, the engine will misfire and that will create erratic combustion, which is a shock to the cylinder, which results in a load harsh noise. Locate the number 1 spark plug wire on the distributor cap and trace each wire to the spark plugs. The firing order will be listed on the intake manifold. Make the correct wire to spark plugs attachments as needed.

You have leaks in your gaskets. or vacuum lines removed and not replaced or broken in the operation. trace air leaks with propane torch unlit. where engine speed increases, you have an air or vacuum leak.

It sounds like the spark plug wires are not plugged into the correct place on the distrubutor. take the distributor cap off and crank the engine over. Make a note of which direction the rotor spins. (Clockwise, or Counterclockwise) then find the firing order for that engine. Sometimes the firing order is on the intake manifold. (if you tell me which engine it has, the 4 cylinder 2.0, or the 6 cylinder 2.5; I could post you the firing order). Now on the distributor cap there is one wire post that has the #1 on it, that would be where you put the spark plug wire from cylinder 1. Following the rotation of the distributor rotor, you would put the spark plug wire for the next cylinder in the firing order after the #1 wire, and so on.

Misfires across all 6 cylinders could indicate the following:


Priority Action Part Type Cause 1 Inspect Wireset Worn, Damaged or Faulty Spark Plug Wire(s). 2 Inspect Distributor Cap Loose, Burned or Cracked Distributor Cap. 3 Inspect Distributor Cap and Rotor Kit Loose, Burned or Cracked Distributor Cap and Rotor. 6 Inspect Spark Plug Fouled, Damaged, Broken, or Incorrectly Gapped Spark Plug(s). 7 Inspect Coil - Ignition Faulty Ignition Coil. 8 Inspect Condenser-Ignition Faulty Condenser-Ignition. 9 Inspect Point Set Burned, Worn or Incorrectly Set Ignition Points. 15 Inspect Timing Specification Incorrect Ignition Timing. 19 Inspect Fuel Injector Dirty or Worn Fuel Injectors. 21 Inspect Intake Manifold Gasket Leaking, Worn, or Damaged Intake Manifold Gasket. 22 Inspect Distributor Worn, Damaged or Faulty Distributor. 24 Inspect Valve Burned, Worn, or Sticking Exhaust Valves.

FIRING ORDERS
NOTE: To avoid confusion, tag and remove the spark plug wires
one at a time, for replacement.
If a distributor is not keyed for installation with only one orientation, it
could have been removed previously and rewired. The resultant wiring would hold
the correct firing order, but could change the relative placement of the plug
towers in relation to the engine. For this reason it is imperative that you
label all wires before disconnecting any of them. Also, before removal, compare
the current wiring with the accompanying illustrations. If the current wiring
does not match, make notes in your book to reflect how your engine is wired.





Fig. 1: The firing order can usually be found cast onto the
intake manifold







Fig. 2: 1984-88 2.5L engine Engine firing order: 1-3-4-2
Distributor rotation: Clockwise







Fig. 3: 1989-98 2.5L engine Engine firing order: 1-3-4-2
Distributor rotation: Clockwise







Fig. 4: 2.8L engine Engine firing order: 1-2-3-4-5-6
Distributor rotation: Clockwise







Fig. 5: 4.0L engine Engine firing order: 1-5-3-6-2-4
Distributor rotation: Clockwise







Fig. 6: 5.2L and 5.9L engines Engine firing order:
1-8-4-3-6-5-7-2 Distributor rotation: Clockwise

Hi wyocwboy here, Have you changed Spark Plug Wires ,or distributor Cap & Rotor? If you have this really sounds more like a Few spark Plug Wires have Been put on wrong. If you have'nt changed opr moved any of the wires or changed cap & rotor,Its Possible that your Timing Chain has jumped a Notch.Clean off your Damper -Which is the Bottom Pully your Hamonic Balacer, then rotate your enging until you Find your Timing Marks, Clean good and take a Marker or best a Chalk or Soap stick and mark it a 8 Degrees BTDC (Before Top Dead Center) Hook up a Timimg like Assuming it does run.And see if your able to see the Timing light Flashing on the mark if not Rote your Distributor either way Slowly and See if you can get the Light on the MARK you Made on The Harmonic Balancer. If Not Either Your Timing Chain Jumped a Notch or your Distributor may be off a nocth. To Check to see if your Timing Chain Jumped a Notch =Remove the COIL WIRE from Distributor Cap So it Won't Start then Remove #-1 Spark Plug Have a Friend Turn the Key off and On just Bumping the Engine a Little at a Time,Keeping a Compression Gauge in the #-1 Plug Hole When the Gauge Needle goes up you are close to TDC (TOP DEAD CENTER) STOP THERE .Check to see if the Mark on your Bottom Pully you made is at or Close to Ling up on top dead center. Trace #-1 Spark Plug Wire up to the Distributor Cap Remember the wires In the Dist. Caps Position or mark it to. Pull the Cap off The Distributor Rotor Should Be Pointing to Close to Where Your Number 1-Spark Plug Wire was Located.
Run These Series Of Tests and it Should Tell you or Give you a Very Good Idea of Your Problem. Please Let Me Know if This Helped You. FROM THE WYOCWBOY

timing may be way off, distributor rotor may not be pointing at no. 1 distributor cap contactor when no. 1 piston is at top dead center. Also, confirm your spark plug wiring order on dist. cap is correct.

make sure the #1 cylinder is at top dead center then make sure the rotor in the distributor is pointing at the # 1 spark plug wire on the distributor cap............if you have already done this you have the timing 180 degrees out and you need to point the rotor 1 half turn(exactly opposite the #1 spark plug wire on the distributor cap)

spark plug wires crossed find top dead center on number one cylinder (sometimes numbered on intake manifold) look under the distributor cap see were the rotor button is located and start there tracing the spark plug wires according to firing order also sometimes located on intake manifold

I had the same problem with my 85 cj7 this week, I relpaced the ignition control module, plugs, wires, cap, rotor and the the coil; still had no fire to plugs. the problem turned out to be my distributor, replaced it today and she fired right up. Most likely it was the pick up module in the distributor that went bad.