Getting on my nerves: Need the experts once again. What is happening to my Wag?

[porkchop]

OK here is the deal. Jeep runs great no engine troubles at all. Drive to work just fine this morning. Have to go somewhere this afternoon. Drive maybe 1/2 mile shut it down. I am there for 45 minutes. Start back up and it does not want to idle. Everytime I get to a stop light I have to choke it to make it stay running. :confused: While driving it worke great but it will not idle. When I take my foot off the gas it back fires, also there is a heavy exhaust smell. When I get home it dies as I am pulling in the driveway. Mess around with it a little and notice the gas is barley squirting into the filter. Shut it down let it sit for a few minutes, go back out and it is running great and the fuel filter is full (clear plastic filter, new). Rev it a few times and the filter empties out and it starts to act up all over again :confused: . Then I figured I would try it one more time and sure enough it runs good again. It did this before while I was wheeling but I figured I stirred up some stuff in the tank and caused it to clog the system. When I had the tank off I cleaned it out, not much in there, so I am sure that is good.

Does anyone have a clue? I am very confussed on this one :confused: .

[ March 13, 2002: Message edited by: porkchop ]

[ March 13, 2002: Message edited by: porkchop ]</p>

[Don S]

PorkChop........Do you have a return fuel line up close to the carb that can bleed off vapor?? Do you have an elec. HD fuel pump at 'bout 5 - 7 lbs. I like the elec. pumps as you can run and hear them "load-up" before you crank the engine. Improper air/fuel ratio could cause a backfire....Just a thought.....Good luck......ds..

[porkchop]

No return fuel lines. I have an Edelbrock 1405 with NO emissions on my wag at all. Plus I am running the stock fuel pump. Does this help?

[steven79]

take the gas cap off when it is doing it, if it starts pumping change the cap it might be pluged up and sucking a vacuum on the system smile.gif

[jeepbob]

PC,
I went thru this on my CJ, it is time for a new fuel pump. It about drove me nuts.

[Bandit]

PC, I agree with Jeepbob, sounds kinda like the fuel pump. If that is the problem be sure and change your oil after replacing the pump. If the diaphram is busted it can leak fuel into the oil pan.

[Ridgbak]

--Fuel pump...It's happened to me several times on different rigs, and the fix is always the same.

[River Beast]

haha... I was just going to say the same thing... change the pump nd check the oil....when thd fule pump diaphram goes, gas leaks in to the crank case.... severly diluting the oil....

thers is alos a weep hole on the pump... any signs of leakage thru the weep hole....CHANGE IT...

Good luck Bryant...

[porkchop]

Well it ran like a$5 on the way to work this morning. The oil smells fine and it doesn't look diluted, but there is a heavy fuel exhaust smell, but the wag is not smoking. So it looks like it might be electric fuel pump time :D .

[Don S]

Porkchop........Most fuel pumps under $80.oo don't suck....long...Most that do last won't feed a thristy fourbore. Still got 'bout 5 out in the barn, :rolleyes: ...Use a small fuel return line. Bench run-in pump with light oil............. ;) ....ds..

[Michael]

Mine did the same thing when the fuel pump died. i also had a problem with the float needle sticking. So it could be a combo of both. I did the pump first and it went away for a while. It did it once more after that. Took the carb apart and wipped the needle clean. Has not done it yet. Mine ran exactly like you described. Real rough and would barely stay running....and smoking a lot. My .02.

[Sgt. Dave]

Porkchop, if you go electric, get a Holley "Red" pump & mount it back by the tank. BTW, be sure to put a filter in line before the pump.

[effle18]

My J10 w/258 was also running similar, I dropped the tank and the line was very clogged up, I cleaned that out and put a new sock on and this got it running better.

[Don S]

Porkchop.....Sgt. Dave named the right pump...Did you happen to move or disconect the vacuum line the dizzy advance in the process??? sure can send fire thru your berret... :eek: ....An make you wish you had on ear muffs...... ;) ;) ....ds..

[Stolen76]

Quick check for fuel in the oil.......

Pull the dipstick and dab the oil onto a piece of cardboard. If there is fuel in the oil, it will run away from the oil puddle. You can actually see a wet, clear area around the oil puddle.

[porkchop]

Ok there is no fuel in the oil I know this for sure. Here is some more info on what it is doing. When the wag is warm and I turn the key it starts up without touch the pedal, always does, but as soon as I touch the pedal and give it a little gas it starts to run like butt. Also around the top of the carb by the accel pump it it is al black with what looks lke carbon. I am really suspecting a carb problem here. I changed the fuel filter just for S&G's and as soon as the wag started the filter filled up with no troubles. One last thing I mentioned before about the back firing when I take my foot off the gas, it is more of a series of back fires like I am not burning all the fuel in the cylinders. Strange.

[Don S]

PorkChop .. Sometimes gasoline, when it leaks and drys fast many times will look black...rub the black with gas on a paper towel and it should turn red....Sticking float?... bad needle & seat?.....ds..

[Jowersgd]

I suspect it is backfiring because you are not burning all of the fuel in your cylinders, in fact you are burning it in your exhaust system. I know this can be caused by running too rich, but also if your muffler is not creating sufficient back pressure. How old is your muffler? Have you checked for exhaust leaks?

[ March 13, 2002: Message edited by: Jowersgd ]</p>

[jeepbob]

PC,
Do you have the plastic floats? I suspect that the float level is too high and you are running rich. Under this condition with a small air leak into the exhaust system you will get the back firing you describe. This will also explain the leakage at the acc pump. The plastic (nitrile foam)floats will pick up fuel after a while and start to sink.

[Sitting Bull]

I don't think an exhaust problem would create an on-and-off type scenario.

Here's my guess...a leaky float. Starts to fill up upon driving, but it will still run OK. Once the Jeep is shut off though, it really becomes an issue. However, if it is off all night, it can evap. and start fresh in the morning.

[Sitting Bull]

That's funny, looks like Jeepbob and I were thinking the same thing at the same time! He can type faster though!!! :D

[porkchop]

Ok I will look at the carb. This is an Edelbrock 1405 less than a year old. I never heard of that gas on the paper towel trick. Another new "test" to add to the data base :D Thanks.

[porkchop]

Ok I have had enough of this. Like I said above I have an edelbrock with the metal floats and I have an off road kit installed. So I am going to rule out a hole in the float.

I bought and installed an electric fuel pump this evening. Easy install. Well it is working as advertised. as soon as I turn the key it squirts the fuel until the bowls on the carb are full and then it stops. I start the wag and it will not idle at all. and when it dies it is really hard to start, it takes a couple of seconds. I use to just turn the key and it would crank right up.

Before I went out and bought the elec. pump I took the carb off and took off the top cover to take a look. There was this brown gooey substence in the bottom of the bowls and the pump spring was corroded :eek: . Could this be a sign that I got some bad gas along the way and all the gooey trash clogged up my idle circuts in the carb? I know that I need to readjust the carb to work with the electric pump but I think it would at least idle, right? Thanks for all the help on this guys.

[porkchop]

Please help me....... :D tongue.gif

[River Beast]

Most elct. fuel pumps need a regulator to adjust the flow... you may be over-feeding the crab..oops... carb ;) ... talk to Jesse on his setup....$$$$$$$

I would go thru and clean the carb... that gunk will block vital passages

[ March 14, 2002: Message edited by: River Beast ]</p>

[Quadra-Clint-]

Just gonna throw this one out,are you using a spacer between the carb and manifold?The composite ones keep the heat down better.
I dont know if thats your prolem but nobodys mentioned it yet.good luck man ..ps im gonna be joinin the Durabak club soon!!..clint

[Don S]

PorkChop .. Run a filter ahead of the fuel pump...To protect the pump and the carb..use a good metal one...Now, with an extra hose, you can pump gas into a can or directly into someones low rider :D .......... ;) ...ds..

[jeepbob]

Now you are getting somewhere the brown gooey subtance could very well be your problem. If it is getting into the idle circuts you definatly would have a problem. Take the top back off and get a can ocf carb cleaner and blow it thru all the passages as well as clean the goo out of the carb. Sounds like you got the bottom of the barrel with some fuel some where.

[Snakeyes_Tx]

I can't believe no one has suggested this yet!

Bryant, try just pouring in a bottle or two of "Seafoam" into the tank and let it run it's course through your fuel system. This stuff REALLY works well and cleans just about everything. Cool thing is, you can use it in the tank for a fuel system cleaner, and you can also use it in the crank-case as a flush.

Gotta love that multi-purpose stuff. I sell it at work, it's about 7 bucks a bottle, comes out kinda greenish like mountain dew, but it'll clean your goo out.

You may need new plugs if that foul stuff got all the way through your engine.

[porkchop]

Where can I get the "seafoam"? I never even heard of it before. I am going to pull my carb apart tonight and gic\ve it a good cleaning and then I will adjust it for the electric pump. The pump is putting out about 6 psi which is what edelbrock calls for. Thanks again for all the help. I will uopdate when I find something out.

[porkchop]

Well it is fixed! I didn't do anything. gsmikie stopped by tonight. I started it it so he could here what it was doing. He fooled around with the carb for about three seconds and it idled then he did some thing else to it and now it runs better than before! Thanks Mike. I owe you again.

[TheSingleGuy]

Sometimes it just takes a new set of eyes with a different perspective. :rolleyes:

[Quadra-Clint-]

Glad to hear your goin again!So what zactly was it?Just out of adjustment or what?I wish your friend lived closer to me,I would stock his favorite beer at my shop!
tongue.gif

[jeepbob]

So much for the theory that you never have to touch Edelbrock carbs..... :D

[JBurke]

Am having the same problem, with similiar symptoms with my 80' Wag...one symptom i have currently is that at idle it jumps up to 1800rpm and back down to 800rpm - up and down, up and down - did any of you who had similiar experiences, have this symptom? I was thinking about starting with the ign. module and then working in to the carb., etc...any thoughts?

[JNErotten]

****, here I was thinking some one dumped sugar in your tank. I know it collects and settles in a brown goo if not totaly diluted and allowed to settle, like in the bottom of a bowl over night...
glad to hear its good now.