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What would make a 1972 Valiant not start?

Updated: 8/16/2019
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17y ago

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There are only three possibilities: Compression, fuel delivery or spark. If all three exist and are properly adjusted, the engine will run. Your first challange is to figure out WHICH part isn't working properly. Fuel is the easiest to check. Use starting fluid to see if you can get the engine to run briefly. Once you rule out the fuel, check the spark. Is there a spark when you crank the engine? Pull one of the spark plug wires and connect it to a spare sparkplug. Lay the sparkplug on a solid metal surface and have someone try to start the engine while you watch the plug. You should see AND HEAR a bright spark while the starter is engaged. Chrysler Corporation vehicles of that year were unique in that they had an "open air" resistor that mounted on the firewall. The resistor was only used after the engine was started. If your vehicle starts then dies as soon as you let off the starter, it's probably that resistor. If it just won't start, that's probably not the problem.

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