CJ randomly won't start

[Gmonroe]

Ok so I'm new here and looking for some help. I have an 84 CJ7 with a 2.5. Runs great 90% of the time but every now and then it just won't start. Cranks fine, but takes me flooring the pedal and it will barely fire and chug like an old train taking off. I've been stranded in the past and today it did it again. When it happened last time I poured gas into the carb and it did nothing different. No better no worse. But today I popped the fuel filter vent line off and was getting fuel. Even had gas leaking around the base of the carb. Just enough to see it wet where the spacer meets the manifold.

So when I crank it without pedal it will not fire. I have to floor it and like I said it chugs and barely fires at a very slow rpm. Today I took off the gas cap, tried again and it chugged and chugged then sped up and finally ran. No problems since. Just so random it makes no sense.

I've added new, fuel filter, fuel pump, coil, plugs, cap and rotor, reman carb in last month or two. Other than that it runs great, just very random. Any ideas?

 

[thescot]

Sounds like a flooded condition caused by a stuck carb float or hung choke flap. Odd you'd have the same experience with two carbs though. To verify its flooded when it finally fires can you see black smoke from excess fuel?

 

[gert]

it should be one of 2 things fuel or spark, looks like you have fuel. It might be the ECM getting hot. I have heard people pouring water over the top of the ECM when your problem creeps back up, it would cool it off and would start working again, also make sure your grounds are good and your coil, plugs, and wires hope it helps

 

[Hedgehog]

I believe you have a carburetor that needs a good cleaning.

 

[Peanut Butter]

What kind of carburator? Rod

 

[BlackOmega]

Sounds like a flooded condition caused by a stuck carb float or hung choke flap. Odd you'd have the same experience with two carbs though. To verify its flooded when it finally fires can you see black smoke from excess fuel?

I'm thinking it's this.


Gmonroe, when this happens is the flap on top of the carb slightly open or closed all the way?
If it's closed, get a pen or something, wedge it so the carb flap is open, put the gas pedal to the floor and crank away. This should help it start if the choke flap is stuck closed.