on my 45LPB, took he out yesterday(sunday) morning and it ran great. took her out in the afternoon to the folks and it ran fine, but when I left their place it ran like poop.

heres what its doing.

take off from a stop and its sputtering(not sure if thats the best term), then it will catch and be fine, don't do it everytime and once I get past the sputtering its fine(seem like its just low RPM), can't say there is a pattern to it. I changed the fuel filter, checked the screen on the carb, the flaot level is fine(center of glass) choke is not stuck on.

now saturday I did spray the carb down, Seafoamed it and changed the oil, but it ran great after that, not untill the next day it ran like poop.

bad accelerator pump? some gunga stuck in a jet? I dunno? carb was rebuilt a few years back localy, then the float sprung a leak, so I swaped it out, been running great for a few years.........till sunday.

Ideas?

John

They aren't that hard to go thru, I"d check your idle circuit for a clog? I"m sure Mark will have the answer tho, He's the Onebarrel guru.. Watched him work on a carb at the 45 run! If ya had been there I"m sure he would have fixed it.
Might pull the idle mix screw and blow backwards. Clean out the float bowl if any crud is in there. Course I"m no carb guy and I didn't even stay in a holiday in express last night! NOt much of a helpful answer huh?

Maybe you knocked loose a vacuum line or ignition wire? Did you re-hook up whatever vacuum line you used for the SeaFoam?

I put the SeaFaom in thru the carb, no lines loose....checked em all the all wires

Maybe you knocked loose a vacuum line or ignition wire? Did you re-hook up whatever vacuum line you used for the SeaFoam?

yeah I don't know carbs inners at all, I'll try the idle mix screw. Idel circut? no clue........

I treid the hillbilly carb rebuild, maybe not correctly as when I put my gloved hand over the carb it would not backfire.

They aren't that hard to go thru, I"d check your idle circuit for a clog? I"m sure Mark will have the answer tho, He's the Onebarrel guru.. Watched him work on a carb at the 45 run! If ya had been there I"m sure he would have fixed it.
Might pull the idle mix screw and blow backwards. Clean out the float bowl if any crud is in there. Course I"m no carb guy and I didn't even stay in a holiday in express last night! NOt much of a helpful answer huh?

what is this seafoam stuff the landcruiser lists and BB's are buzzing about?

http://www.seafoamsales.com/motorTuneUpTechGas.htm
I haven't used it myself. I'm having a similar carb problem with my dd ('84 plymouth horizon :( sucha winner mobile)

You check your plugs for crappy crud?

plugs look just fine. I went home, fed the carb some more carb cleaner, opened up a few things(that I don't know what they do) sprayed some more cleaner...........seems to run just fine........drove it around for 1/2 hour or so.

check the accelerator pump......its squuirting.......or at least something is ;)

Ive been fighting the same problem on my 76 2F. It only does it directly after heavy wheeling though. The rest of the time it runs like a top. Basically as soon as I get back to the road it starts doing this. After about 15 miles of regular road driving it stops. I did found a sensor that was plugged into the back of the carb that I belive is something to do with the smog stuff that I have completely removed. It seems to be better if I leave that sensor unplugged but it still does it...

fuel pump. might be wrong , but , fuel pump.

talking about my problem or 76lcforty's problem or both?

fuel pump crossed my mind.......but would be intermitent? what could be wrong with it that might cause it to sometime work and sometimes not?

fuel pump. might be wrong , but , fuel pump.

any thoughts on if this could be caused by a bad mechnical fuel pump?

I have only had them leak, not intermintedly work.

usually if the fuel pump goes out it'll not work at speed. But they're cheap and should fit most of your fleet! Might grab one to check.. I'm running a newer fuelpump on my onebarrel. Where's the guru?

yeah it seem to work fine at speed and as monday it seems like its running fine(but I haven't drivin it sense then)...........but I did order up a new FP.........figure if I have it, it will run fine forever ;) just like the spare parts I bought for the UZJ..........having a new OEM starter laying around almost guarantee's i won't have starter issues ;)

usually if the fuel pump goes out it'll not work at speed. But they're cheap and should fit most of your fleet! Might grab one to check.. I'm running a newer fuelpump on my onebarrel. Where's the guru?

Where's the guru?

Who dat? :shaking:

Actually, for once [and I think this is a first] I like Erik's idea about pulling the idle mixture screw and blowing backwards. Never tried it, but it's got to be easier than changing a fuel pump. I don't give it a lot of hope, but the entertainment value of picturing John blowing thru a hose makes it worth suggesting. :flipoff2:

LCJ and I went around and around with something like this a few months ago. He kept saying it was the Q-Jet I rebuilt, and I kept saying 'I don't think so.' Finally he replaced the fuel pump. He hasn't mentioned it since.:emb:

I have my own fuel gremlin. My F135 is so fast, I can run the motor out to full throttle and suck the carb dry while parked in the driveway! And that is while pumping from a 5 gallon gas can [eliminating tank pickup possibility] with an electric or brand new mechanical pump, and with a modified 1bbl needle and seat assembly that will flow at the rate of an 2bbl. :mad3: I generally don't care,because I don't run the motor at full throttle [see comments on TBI thread]

Any one else use it here with good results (Sea Foam?) My carb is starting to run rough at cold and is really smelly to drive with the top on. I tried the BGK product and it runs a little better, but didn't help the smell.

I'm going to check tomorrow just to make sure the smell isn't caused by some disconnected emissions stuff (since most of its gone!)

Well I figured it out I think. Replaced the fuel pump, that wasnt it(didn't think it was but worth a shot)

Then I start thinking(should have treid that earlier ;).........this HAS to be ignition related, just feels like it, fuel/carb problem wouldn't act like this. It runs fine untill I shut if off and it sits for a bit then when I start it back up it runs like poop. So I pop the cap(which is OEM and less then a year old) and I notice the cap looks like crap inside, so I am thinking why? well I had both the vents on the cap pluged off(this is a fj60 dizzy) I suspect it needed to breath(like it would on a 60 thru the firewall) So I replace the cap(and adjust the timing) and she runs like a champ. So it was the cap and I think it was buggered because of it being sealed up tight with no vent........make sense?

Didya see any crud built up on the terminals in there? Last time out on the trails we had a club member with same symptoms. Running fine, then started crudding out. Popped the cap, and moisture inside had let white flaky crud/corrosion buildup on the terminals inside the cap. A little leatherman scraping, and he was running fine again.

Yup, thats what I saw, and what looked like moisture on a few of the contacts, so it must have been condensation or something. I would have cleaned it up........but just grabed a new cap off the shelf. I unpluged one vent and made a loop till I run it into the cab or something......

Didya see any crud built up on the terminals in there? Last time out on the trails we had a club member with same symptoms. Running fine, then started crudding out. Popped the cap, and moisture inside had let white flaky crud/corrosion buildup on the terminals inside the cap. A little leatherman scraping, and he was running fine again.