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Q: Crank shaft and fuel pump problem.

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After changing the crank shaft in a 96 Jeep Laredo, 4 wheel drive, 6 cylinder; if it's loose child that damage it? Also, why would the fuel pump stay on all the time? Thanks in advance
My car has an automatic transmission.

Hello.

If you are referring to the engine crankshaft, then yes, a loose crankshaft can definitely cause damage. A loose crankshaft means that the bearings or journals are worn, which will continue to wear, usually at an accelerated rate until engine knock develops. A fuel pump may stay on if there is some sort of electrical short feeding it power. This can happen due to a faulty relay, or a shorted wire.

Regards,

Eduardo YourMechanic

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