Question about 1992 Dodge Dakota

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It lacks power and pops out the intake after it is warmed up. it has all new tune up except the coil. i just replaced the fuel pump, fuel filter, fuel lines and all exhaust leaks. it is a 318 magnum

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If it is backfiring up through the intake manifold then you have one of two problems, either your ignition timing is to far advanced ot you have a burned or damaged intake valve not seating at point of combustion. you say it lacks power it could be for several reasons, to diagnose and not guess is the best policy, preform a wet and dry compression test and or a cylinder pressure leak down test, this will tell you the internal mechanical condition of your engine, it will tell you the condition of the Rings, and Valves in each cylinder and a leak down test will tell you the percentage of leakage in each cylinder as well. I would look first to your Ignition timing and also check if you removed you distributor that it was put back in it's proper location then after that preform the above mentioned diagnostic tests...

Posted on Oct 05, 2009

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