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Discussion Starter · #1 ·
Used the jeep last weekend to pull some shrubs, ran great and did the job. Went to drive.it today and won't start. Have spark, no fuel. No fuel to the mechanical pump. Dumb question, is there a pump in the tank? And if so why a mechanical for? To help with pressure? Thanks.
 

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Discussion Starter · #2 ·
Doesn't seem to be getting any fuel to the mechanical pump on the block. Any . Help would be great. 88 YJ with 4.2L.
 

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What you see on the passenger side of the engine block is the only pump. The mechanical pump doesn't put out much pressure, it isn't needed with a carburetor. Makes it easy to replace the pump as you don't have to drop the fuel tank.

A few things could be going on here: low on fuel, a bad fuel pump, an obstruction in the pickup tube/fuel line, or a dislodged/broken fuel pickup tube (located in the gas tank).

I would first make sure you have enough fuel. Seems obvious, but you don't want to assume the fuel gauge is correct to only find out it wasn't after wasting money replacing good parts.

If fuel level is sufficient and you don't want to immediately throw on a new fuel pump, see if you can use a hand vacuum pump to draw fuel through the section of fuel line that is between the fuel pump and tank. If you can draw fuel using a hand vacuum pump, but the fuel pump wont, then the mechanical fuel pump is bad.
 
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