Question about 1966 Ford Mustang

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Ford 351W about a week ago i was driving down the road, car pops, backfires and then dies, still will not start. the engine will spin over and over, when gas is given it just pops through the exhaust or out the carb., sometimes both. i have traced back all the wiring, replaced the coil, new distributor cap, new rotor, new plug wires. the carb is getting gas, coil is firing....i'm at a loss here, everything under the hood is new...... specs:1967 mustang, ford 351W bored .30 over, flat top pistons, 282 cam, holley intake, edelbrock carb, accel super coil, alminum radiator, 10w40 motor oil... less than 5,000 miles on rebuild. i'm kinda thinking maybe a timing issue? maybe jumped timing?

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  • matty67 Jul 29, 2008

    how do i check tdc?

  •  Tasa
    Tasa Sep 25, 2013

    I agree it IS [at least] a Timing Problem. When you say it "Pops" what do you mean? The first thing that comes to mind when i read that it "pops" is that it is backfiring thru the carb/intake. Is my assumption correct? If so, i stand on my forst comment...definitely [at the least] Timing Problem. You should begin---at---the BEGINING so to speak LoL...check your timing and that should give you some [proverbial] Bread crumbs to follow onto what will (hopefully) be the Right track! Let us know what you find with the timing and we WILL get Your Monster Roaring for ya again ;-)

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Your engine has jumped time

Posted on Dec 30, 2008


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Did you check the timing belt. TDC pull the plug out of #1 cyl and turn the engine by hand and look in the hole and you will see the cyl rising . when it reaches its highest point you have TDC the rotor should point to the number 1 plug when it is TDC.

Posted on Dec 09, 2008

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Power valve on carb?

Posted on Sep 20, 2008

Check your points sounds like there closed up. Open them up use a set of feller guages

Posted on Sep 15, 2008

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I agree, jumped timing. Check to make sure the dist is tight. Than check for tdc on the #1 cylinder. When the #1 cyl is TDC the rotor should be pointing to that wire on the cap. Take the cap off while checking. Also is easier to turn motor by hand without plugs in motor.

Posted on Jul 29, 2008

  • farrisee Aug 01, 2008

    There are a few ways. If you can have clear view of the spark plug hole than flash a flashlight down the hole and try to see the piston come up to the top. A second way si to use a long screw driver in th ehole. Stick the screwdriver in the hole and turn the motor watch the screwdriver come up and once it begins to fall stop, back up until the screwdriver is out as far as you can get it. BE CAREFUL. If you put the screwdriver in wrong you can punch a hole in the piston. Make sure the screwdriver is not binding while you turn the motor. A third way is to fill the cylinder with oil and turn it over until the oil stops pouring out, this is the safest and messiest way to do it. I personally use the screwdriver. A fourth way is to pull the valvel cover off and watch the valves open and close. In between the intake and exhaust opening is the compression stroke. Watch the intake valves close, this means the piston is at the bottom of the intake stroke turn the motor until the exhaust valves open and than close again. as soon as they close you are t tdc of the exhaust stroke. The intake calve will begin to open after the revolution once the intak valve opens you have gone past TDC. Again the screwdriver method is the easiest and fastet but BE CAREFUL.

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