AMC 150 and Carter YF/YFA update

May 14, 2004 3 Replies
C

Here's the latest information. We covered the access port under the stepper motor in the carb, and it has no effect. With the air cleaner removed and the nutter bypass installed, The '84 Jeep starts and idles just fine. The problem comes in after the engine warms up. When the warm engine is shut off, fuel keeps running into the carb for some reason. Then, with a warm engine and the intake full of fuel, it's obviously flooded and will not restart. The question becomes, why is this fuel still running through the carb and into the throat? Our best guess is that the carburator float has a problem, or a needle valve problem or dirt. It did not have am inline fuel filter on it (it does now). Anybody have anything to add or other opinions?



Chip


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J

Overhalut the carbureator and install a new float needle & seat.

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M

They sometimes call that vapor lock. The vapor builds up in the hot gas line forcing the gas out of the line and in your case flooding it out.

To start, the needle and seat in the carb are worn badly likely. They are 'supposed' to get a new one with a carb kit every time you change the spark plugs.

Then you have to address the gas supply issue. Jeep uses a two outlet gas filter in it with a return line to the tank specifically to stop the problem you are seeing.

The center outlet on the gas filter goes to the carb and the top outlet goes to the return line. It is important the return line is at the top to avoid gas siphoning when it sits.

Your gas tank also has a vent line on it that leads to a charcoal canister.

So basically you have 3 lines going from the front of the Jeep to the gas tank.

Sounds to me like you are missing at least one of them.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

Chip wrote:

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