CJ7 not starting..

[wskaik1]

Hello,
Over the long cold winter here in Chicago, I allowed the CJ7 to sit for about a month and a half without starting it. It was getting harder and harder to get it to start and keep running every time I tried to start it. Then the winter decided to be long and super cold so I just pulled the battery out of it and put it on the charger inside the house. Now that the weather is better, I put the battery in and the jeep won't start. It will run when I put gas in the carb but it will die as soon as the gas is consumed. I then replaced the filter by the carb and the fuel pump and it is still not starting. It cranks fine though. I am considering pulling the gas tank and blowing the lines. I want to see if I'm on the right track here or does someone think I should check something else. Please help!
Regards,
WSKAIK1

 

[Hedgehog]

Cleaning your fuel tank is probably not a bad idea, but I doubt that is your proiblem. It sounds like your not getting any fuel. What supplies the fuel? It's the fuel pump of course. I change that out first.

 

[hdgapeach]

If your new fuel pump isn't producing any fuel and the tank has plenty of fuel in it, I would check a few things:
1) Do the rubber fuel line sections have cracks in them allowing air to be sucked in the line rather than fuel?
2) Can you siphon fuel through the fuel line up to the fuel pump?
3) Is the fuel pump rod installed against the eccentric correctly?

To fix #1, replace all old rubber line sections.

For #2, use a brake bleeder pump connected to the rubber line coming from the tank at the end where you would connect it to the fuel pump. Pump the bleeder pump to see if you either draw fuel through the line or create a vacuum. If you create a vacuum, you probably have a clogged fuel line, a kink in the line or a stopped up fuel sending unit (requires dropping the tank).

#3- If you installed the fuel pump with the lever on top of the eccentric it rides on, it ain't going to pump anything. Remove & reinstall it correctly.

 

[mtnwhlr]

A easy way to check the fuel pump is to get a gas can of gas and run a line from the pump into the gas can of gas and then prime the carb it may take a few times and if it stays running you know the problem is from the tank to the pump if you still can't get to run replace the fuel pump.

 

[Techlight]

The other guys posting will set you right...

Just thought I'd post this link to a troubleshooting guide from the Technical pages on this forum.

Good stuff and lots to read ...hope you get it sorted out soon.

http://www.jeep-cj.com/forums/f99/engine-wont-start-troubleshooting-guide-19494/

 

[Lumpy Grits]

Put 5 gals of prem. gas in the tank.
Then disconnect the line from the FP to carb and see how long it takes to fill a bottle when the engine cranks.
Make sure you don't have any back/cracked fuel lines at the tank. All that happens then is sucking air and not fuel.
LG