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Mystery ignition problem...!!!???


Guest Ptwms@live.com

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Guest Ptwms@live.com

My 1930 Fordor in good original condtion won't start. There is spark at coil wire and points but not at plugs. I replaced the coil, condenser, dist. body, cap and rotor. There seems to be voltage at all the right places. Cranks fine but won't fire. Also, lights, horn and wipers not working but not sure if there is a relation... Some "old hands" have looked at it but are stumped. Any fresh ideas would be much appreciated...

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Has someone added an in line fuse some where or an anti theft or cut out switch? Sounds like the spark is grounding out some where. Are the coil wires Pos. ground. Bill

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Have you pulled a plug and checked for spark? If your car has an original ignition switch it may be shorted inside which does happen from time to time. Did you check the condenser lead wire? If the lights and horn don't work you may have a broken wire or loose connection at the ampmeter.

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If you have a good spark at the coil wire (and I mean an nice fat strong spark) and not the spark plugs, the cap, rotor, or distributor body are suspect. But you say you replaced them. What you've left out of your investigation is the sparkplugs. Have you pulled them and checked for fouling?

The horn, lights and wiper not working seems to indicate that there is a fuse somewhere that has blown. Blown fuses mean a short somewhere, and a short anywhere can effect the ignition. I'd hunt that short down and fix it, along with checking those plugs.

Edited by Pete O (see edit history)
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Guest Ptwms@live.com
Has someone added an in line fuse some where or an anti theft or cut out switch? Sounds like the spark is grounding out some where. Are the coil wires Pos. ground. Bill

Thanks for your reply, Bill. No fuse, anti theft, cut out or any other accessories except cowl lamps. I tried reversing the coil wires but that did not help either.

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Guest Ptwms@live.com

Thanks much for your interest. New ignition switch, ammeter connections tight. Plugs are new, with just enough moisture to know it's getting gas. New condenser, but I don't know if there is supposed to be some kind of insulating washer on the back of the condenser.

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Guest Ptwms@live.com

JF, thanks for the tip. However, I have switched the cap, rotor and body. Someone said I could have a short inside or underneath the distributor but I'm not sure how to check for that...

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Do you have a copy of the Model A Mechanic's handbook? There is a good troubleshooting section there that will help you find out where the problem is. Also, just because you have replaced a part does not always mean that the new part is working correctly (or that you got it installed correctly). It is necessary to follow a systematic troubleshooting chart to find these types of problems.

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It's a long shot but back in the 60's I had a similar no start and the spring loaded end of the ignition switch wire into the base of the distributor had broken loose. I was in college at the time and walked the cable down the road to a local mechanic who charged me 25 cents to solder it. Those were the days....

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