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1988 jeep larado 4.0 fuel injected thats hard to start hard to ke

1988 jeep larado 4.0 fuel injectedthats hard to start and after starting runs like it got a vacuum leak have to pump the fuel petal to keep running.

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Take a can of parts cleaner and spay it around the throttle body to check for a leak and if it is not there then sprat it around were your vacum hoses are connected to the engine that is how i check for vacum leaks.

Posted on Sep 12, 2009

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Posted on Jan 02, 2017

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Where is the fuel pump relay switch on a 1988 Ford Crown Victoria 5.0


The computer controls the injection of the fuel. If you look at the wiring diagram you will note the bottom 4 pins that are the negative and positive to the left and right injection. Atleast on my 1991 it is .Could be the ecm or computer is sending a false signal or not sending one at all. A sign of this is the fuel pump in the gas tank can be heard and will continue to run as if pressure in the fuel system is not building. Tthe truck want crank as if no fuel. When starter fluid is injected into the Throttle body the egine will start and run untill fluid is used up. It will keep running as long as fluid is added.

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1 Answer

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How many miles on your subie? Is it fuel injected? I think Subes still had a few carbureted models even up to about 1988.
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1988 jeep larado recent tune up and will usually run fine especially in town.. but on the hiway or accelerating onto the hiway sometimes engine will sputter or shudder {Like a fuel problem} when you back...


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1 Answer

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It sounds like the fuel pump try banging on the fuel tank with a block of wood while someone else attempts to start it. if it starts after a couple hits its the pump if still nothing check the relay under the hood

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1 Answer

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1 Answer

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Repelce fuel filter, check is there any fuel leak,
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