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engine trouble. help with diagnose please.

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Old Dec 9, 2014 | 02:04 PM
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engine trouble. help with diagnose please.
my 74 f350 sat for a week, the engine is a 351m or 400 ,not original to the truck. I started it. it ran for about a minute with my foot on the gas to warm her up. i backed off the throttle she just quit fast, and wont start now.

i have power to the coil, and the test light lights up from negative on the coil to positive on the batterie. i did go to napa and buy and replace the coil anyway .

it gets gas to carb and i spray either and nothing,

i thought maybe i flooded it, let it sit overnight and today no start.

its raining now but what is next to try? thanks
 
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Old Dec 9, 2014 | 03:45 PM
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Well, if it won't fire with ether, I'd look to the ignition system next. Sounds like you verified that the coil is good; check to see if you're getting a spark.
 
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Old Dec 9, 2014 | 04:35 PM
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Originally Posted by Byrd.Dog
Well, if it won't fire with ether, I'd look to the ignition system next. Sounds like you verified that the coil is good; check to see if you're getting a spark.
yes i will when the weather breaks. i am ttrying to get a jump on what it could be.

thanks
 
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Old Dec 9, 2014 | 08:22 PM
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well i just tried to get spark from the coil wire grounded to the block and no spark.

the coils is good.

what should i try next?
thanks
 
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Old Dec 9, 2014 | 08:28 PM
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What type of ignition are you running ? Points , Ford duraspark , MSD ...? Sounds like an igniton problem for sure .
 
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Old Dec 9, 2014 | 09:25 PM
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Originally Posted by JWC 3
What type of ignition are you running ? Points , Ford duraspark , MSD ...? Sounds like an igniton problem for sure .
old school points, should i pull the distributor or change points and condenser first.

can the points just stop working like that ? thanks
 
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Old Dec 9, 2014 | 09:34 PM
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Yes , points can stop just like that . Get a new set of points and a condensor . Check the wiring coming out of the dizzy while there .
 
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Old Dec 9, 2014 | 09:36 PM
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Originally Posted by JWC 3
Yes , points can stop just like that . Get a new set of points and a condensor . Check the wiring coming out of the dizzy while there .
thanks, i will change out the points set , and post back my results.
 
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Old Dec 9, 2014 | 09:41 PM
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One more thought ,,, make sure the rotor button is turning while the engine is cranking ...
 
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Old Dec 9, 2014 | 09:43 PM
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Originally Posted by JWC 3
One more thought ,,, make sure the rotor button is turning while the engine is cranking ...
If it don't then the timing chain popped, correct ? Thanjs
 
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Old Dec 9, 2014 | 09:49 PM
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Timing chain or gear ... or dizzy gear sheared or loose . Hope the points and condensor or wire inside the dizzy is grounded out .... Best of luck ! Let us know what you find .
 
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Old Dec 9, 2014 | 10:19 PM
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Try to use genuine Autolite condenser and points, the replacement points available today are mostly junk and the condensers even worse.
 
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Old Dec 9, 2014 | 11:21 PM
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Will the points be junk if the condenser wire is grounded, even after I fix the short ? Thanks
 
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Old Dec 9, 2014 | 11:35 PM
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No, the points would've ok.
 
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Old Dec 10, 2014 | 08:58 AM
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I personally wouldn't invest too much time & money into making the old school points & condenser work when there are so many electronic ignition options available.
 
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