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Re: My truck will turn over but will not fire up.
You should take the distributor cap off and take a nail file the ark points on the inside of cap and on the rotor put it back on and try to start it up if it works i would get a new cap and rotor,if not try to take a test light and check if the coil is getting power
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if the coil is tested fully and is good where have you checked for it being good? have you checked if the HT lead from the coil to the distributor is carrying power? If you have power at the distributor cap , all the contacts are good, the rotor is fine, (check current at the distributor cap centre pin) then the likely problem is the machanism for firing, i.e. Hall sensor . I would check all the HT leads, distributor cap, rotor etc. you should carry out the checks systematically. I.E. First check at the coil with a multi meter. Then check at the end of the Ht lead from coil to distributor , actually within the lead itself , for current. then attach it to distributor if it shows a current...if you are getting a current from the distributors centre pin the issue is probably the cap itself, the rotor arm, the firing system, it will probably be electronic as mechanical distributors went out some years before I think. or if that is okay, the leads themselves. I would guess that is is distributor cap or firing system related'
if its the rear mounted distributor to the cam by firewall,looking inside cap it's the bottom contact. you can verify is point to point contact with an ohm meter. the firing order once the cap is reinstalled looking left to 4312. which translates to 1342. BE CAREFUL OF THE 3 PIN PLUG ON SIDE OF DISTRIBUTOR & wiring becomes brittle.
remove the distributor cap and check inner part of the cap there should be a black pin (Carbon Look) in the center of the cap, if you only have a hole, the pin fell of and without it the spark won't jump from the coil to the spark plugs. If it fell, take the old cap, and take out that pin and put it on the new one.
when you install the distributor the rotor button should point at the # 1 plug wire on the distributor cap make sure you are on the compression stroke of the motor when doing this you can verify that you are on the compression stroke by removing the #1 spark plug and turning the engine over while holding your fingure over the spark plug hole it will push your finger off the hole you need to spin the engine .spin the engine over slow while doing this so you don,t pass the timing mark on the harmonic balancer.
Yes. Bring number 1 piston to top dead center of the compression stroke. Remove the distributor cap and see which post on the cap the rotor button is pointing to. This is where the number 1 plug wire goes. Follow your firing order on the cap in the same direction the distributor turns and your firing order will be right.
I think you need to re-time the ignition--remove #1 spark plug (front plug on driver's side), place a ratchet and socket on the crankshaft bolt, stick your finger just into the plug hole, and turn the engine CW through until you feel pressure building in the cylinder. At that point, remove your finger and watch the degree marks come up on the crankshaft pulley or vibration damper as you turn slowly. When the idle firing point aligns, stop turning. Open the distributor so that you can watch either the points just start opening or the reluctor tooth just enters the stator match point while you rotate the distributor body. Tighten the distributor clamp lightly. Check that the rotor is pointing at #1 plug wire. If not, shift the wiring in the cap around until it does while maintaining firing order. The engine should run at that point. Use a timing light to get it right on later. Tighten the distributor when everything is right. Hope this gets you running!
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)
With the timming marks lined up make sure that cylinder 1 is at top dead center on the compresion stroke, then as you lower the distributer back in make sure that the rotor is pointing to the number 1 plug wire post on the distributor cap,mark the distributor where the #1 post is since you can't install it with the cap on.