Question about Plymouth Cars & Trucks
There are many reasons why an engine should spit back through the carb. I once encountered a Ford that had a worn exhaust lobe on the camshaft so the valve was barely opening - the engine ran very well until the throttle was opened. It is still a huge mystery how the owner had managed to drive it to my workshop.
The most common reason is a lean air/fuel mixture caused by one or more carb jets being blocked.
A thorough carb clean is a sizeable task that shouldn't be undertaken lightly and it is best practice to tackle it last after ensuring everything else is as the manufacturer intended it to be - from spark plugs and spark power/quality, timing, valve operation, fuel delivery quantity and pressure, etc., etc.
Posted on Oct 05, 2019
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Posted on Jan 02, 2017
You need to Replace your Gas Cap. The Seal is worn and it is allowing Air to get inside the Fuel tank Causing your Rough Idle.
Posted on Jan 20, 2009
Sounds like a bad fuel injector. Shop would need to run a contribution test to confirm. I must say, good detective work, good luck.
Posted on Apr 29, 2009
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