Question about 1987 Mercury Grand Marquis

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Will not start has no spark has fuel until cranked then flow stops

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It's the fuel pump.

Posted on Oct 16, 2013

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Posted on Jan 02, 2017

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SOURCE: When cold it cranks & cranks forever and will

Try replaceing the fuel pump relay its inthe glove box behind a panal and also check the oil pressure sending unit because that is a back up power supply for your system. But the relay should solve the problem

Posted on Jan 07, 2011

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First, lets be clear with terms. To crank is to turn the engine over, you can do this manually with a wrench on many vehicles. It requires no spark or air. To turn over or to fire is when you achieve combustion. Example: You could pull the spark plugs on a vehicle and turn the key and it would crank, but it wouldn't fire or turn over.

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Past that, I'll leave it to someone more experienced than myself, but that would be how I troubleshot my own vehicle.

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