F head issues

I finaly got around to seeding my yard after building the house 2 years ago. I boorowed the father-in-law's tractor, and disked up the entire yard. Used a piece of chain link fence (weighted pretty good) to drag it smooth. Tractor quit on me half way through. Used the mighty Jeep to finish the task. Bought a bunch of overpriced grass seed and cast it with a hand caster. Directions call for the seed to be rolled under the dirt. Grab the jeep and the piece of fence.

Almost to the point. My plan was to use the Jeep to pull the fence again. Everything started fine. Clouds began to roll in, (rain was forcasted, perfect for grass seed) but the front brake on the Jeep started to grab and hold. No problem, shift into low, leave the manual hubs unlocked, and keep on going. I guess the extra weight of the drag, the brake holding, and my unrelenting foot was a little more than the cooling system realy wanted. I stopped almost each round of the yard to hose under the hood. (important note... the Jeep never blew steam or otherwise told me it had had enough). Just before the monsoon set in, she took her last breath. I though maybee out of gas, since it slowed to a stop and the motor cut off. I filled the tank, jumped back in, turned the key, then, almost soiled myself. The noise from my Jeep backfiring was louder than the thunder. I have never before heard anything like that from her before.

If I have not bored everyone to sleep, my point. Do you think I killed her? She never offered to run anymore. Just spinns. Give it some gas while spinning and the spinning slows down...then the backfire. I used another truck to pull her out of the front yard, but have not had the heart to touch anything since. Someone please give me some hope.

 

I might have gotten it wet when spraying under the hood with the hose. I don't know. This Jeep gets wet alot and I have not had that issue. Not to say it could'nt be.

Will I do any further damage, (if I have done any) if I keep trying to start it?

 

Why keep trying to start it?

I meant to ask....When I go home today, if there is no moisture under the cap, would it do any damage to try to start it again?

I am assuming that flushing the cooling system is in case there is any crud that may be stopping things up?

Oh yea.....I am not much of a mechanic. I know just enough to alow me to take things apart into as many pieces as possible, then loose the important ones. (in case noone figgured that out by my questioning)

 

Alright, I went home last night and turned the key. She fired right up. Must have been some moisture under the cap that dried. I ran around the farm a little bit with no problems shutting her off and restarting a few times.........

Then I stopped at the house. When I came back out she would not start. Spinning and backfiring again. Fuel was not making it to the filter bowl. I unhooked the line from the tank to the bowl and blew through it. It was clean. Re hooked it and tried to start. No fuel in the bowl. Thought there might bea blockage between the filter and the carb. Unhooked that line and blew through it. It was also clean. I tried to start it then, (with the fule line unhooked) and she ran like a top (I assume running off whatever was left in the carb. Bowl quickly filled up with fuel. As soon as I hooked the fuel line back up snugly, she cut off. I unhooked the air horn at the top of the carb and I now have fuel, but she is not sucking air. Is this a carb adjustment issue? The carb is a fairly new 1 bbl Carter (might have 3 - 400 miles)

 

Neglected to mention, but I crawled unerneath last night, and unhooked the fuel line. Fuel came free flowing from the tank, along with from the filter. There are a couple of sections of rubber line in my system, so you think that might be the issue? Why would it run with the fule line unhooked, (no vacume to fight?)

 

Have you tried it without your fuel filter?

 

The filter that I am speaking of is attached to the engine. It has a hard line plummed in, and a hard line plummed out. It looks like a glass dome that covers a screen. It is mounted on the drives side of the block. I am pretty sure the pump is incorporated somehow. (like I said, no mechanic)

I do not have any other in line type filter.

 

That would be your mechanical fuel pump which doesn't have an inline filter. Many folks usually put in a disposable in line filter after the pump.

As far as runnnig with the fuel line unhooked that sounds fishy...sorta possessed! Was your JEEP ever running right and if it did what was the last thing you did to it.

Or are you saying you unhooked the line from the gas tank to the fuel pump and you had some fuel left from the pump to the carb and it ran fine for a couple seconds? If that is the case than vapor lock?

 

What about the gas cap...could it have a non-vented cap on that's causing the tank to vacuum lock? Have you tried taking the cap off to see if anything changes?

 

The Jeep was running right before the incident when it cut off.

It ran for about 30 seconds with the line from the pump to the carb removed, then I shut it off. How would I fix vapor lock?

The gas cap is a vented cap. I know this from overfilling the tank on occasion and letting it sit full in the sun. The fuel expands and pushes out of the cap. I reinforced this fact by submerging the Jeep in a pond a few years ago and filling the old tank with a fine silt type mud (by way of the vented cap). I have not tried to remove the cap and run it. I will try that tonight and report back.

Thanks for everyones input. Please keep it comming

 

Is the gas cap vent blocked, making a vacuum? Try leaving the cap off.

Could you have mixed up the vaccum and pressure ports on the fuel pump somehow?

Pete

 

That's what I was thinking when I first heard about the JEEP running with disconnected fuel line. Now that he says, "It ran for about 30 seconds with the line from the pump to the carb removed, then I shut it off. How would I fix vapor lock?" it sounds right.

63CJ5UNIVERSAL post a pic and lets see what you got going on.

 

Unfortunately, I cannot get pics into the company computer. No internet at home either

I could not have the ports backwards, as the Jeep has run fairly well for the past few years. When it is doing right, the fuel comes in, and leaves as it should.

Last night I got home, turned the key, and she fired right up. Drove it about a half mile, parked it, then the same agravating #@*% I removed the gas cap to see if it would make a difference, and nothing. Backfiring and refusing to start.

I did notice that the carb is sucking (air) REAL hard when it does run. I can hear it over the valve "tick", but that is a whole nother issue. When it is refusing to run, the carb is not sucking any air.

As I posted earlier, I apreciate the responses.....keep them comming.

 

simple test. when it doesn't start, dribble a very small amount of gas into the top of the carb. Like a table spoons worth. Then, keeping back away from the carb, try and start it. If it starts and runs for a sec, then you have a fuel delivery problem and not a fire problem. If you have fuel in the tank, and in the glass bowl in the pump, and it is still not running then the pump may be bad, or the carb may be clogged internally with trash. with the engine cold, you should be able to look down the throat and see fuel squirt into the carb when you open the throttle quickly. if not either there isn't fuel in the carb, or the accelerator pump isnt working. if were getting fuel and it wont run then its an ignition problem. if it isnt getting fuel then its a fuel issue. isolating to fuel or spark is the first step here. HTH