So I finally took Justin's (don't know his PBB username) Q-Jet apart this evening. From his description on the phone, I thought it sounded like a dirt problem. Wasn't expecting quite so much tho!

The accelerator pump chamber was so full that this all came out BEFORE I even started scraping! :eek:

Already put a whole hour into pre-dip scraping. What a mess.

The carb I just rebuilt looked the same. I had to let it soak in carb dip overnight to break up the crud so I could get it clean. Once I took it out of the spa, used my trusty comprerssor and nozzle to blow out all the ports. Clean as a whistle. I would say I had 4 hours into cleaning an assembly. Worth the time though!:skull:

Thought I would have better luck with the Aisan 1bbl off of the dealership FJ55 that was supposedly rebuilt. Think again! :flipoff2:

Yummm......

:D Yummm......

Thought you'd like that Dave! Your carb was that dirty on the outside, but nice inside!

This one was a non-USA SOR carb that came in on a new job Wednesday. I told the customer I don't blame Marv one bit for not warranty-ing it. I don't warranty dirt either.

your thumb looks like it was in the dip too long! :flipoff2:

Shouldn't wear ring either while your wrenching, remember what happened to your toe? :flipoff2:

Stupid question but all that dirt comes from dirty or bad gas or bad fuel filters or what?

Usually comes from NO fuel filter. I had tons of rust in my old aux tank, and had to change the canister fuel filter EVERY tank of gas, but didn't get any in my carb.

Now injected with no aux tank, new main tank, no problems

Stupid question but all that dirt comes from dirty or bad gas or bad fuel filters or what?

He said he installed the new filter BEFORE this happened, but I am dubious! Even more interesting, he says he paid $265 to have the tank boiled out and 'resealed' IIRC, a new tank is less than $300. :shaking:

It's not just a left coast problem. This one [like the devil] came from GA. :eek:

Cool pics!
Makes me think the money I am going to spend on a rebuild will be worth it.

David. WTF you guys using for fuel on the beast coast? :eek: Tell those guys moonshine only works in Texas!

I'd mail that white powdery stuff back to you, but I think it would be a federal offense! :eek: :p

My carbs made it onto POR? what an honour. BTW I never owned or ran any of those carbs; they all belong to customers.

Mark, if you won't be giving away trade secrets, what do you soak the carbs in? And use for a general cleaing chemical? No biggie if you want to keep such info to yourself. TIA. :)

No secret Walt. I use a commercial carb dip to soak the carbs, and ordinary paint thinner to scrub them. Not as good as the old SafetyKleen, but I'll prolly live a little longer without the VOCs!

One more reason I don't go the beadblasting route on cleaning-unanticipated consequences. This weeks gems included this one. Beadblasted 76 carb from PA where the shop was too lazy to scrub the varnish off the power piston so they blasted it. PO must have had a hell of a time with this carb because the blasted piston was frozen in the on position, which keeps the power valve open as soon as the primary circuit is engaged!

And then there's the second tard special from GA, with a bolt screwed in where the fuel shutoff solenoid is supposed to be!

fuel shut off . Like shut of when ign. shut off or when bowl is full shut off ? just curious ?

fuel shut off . Like shut of when ign. shut off or when bowl is full shut off ? just curious ?

Ignition. A nice feature of the Aisan carbs.

:)

very cool , so when you roll you get fuel shut off when you kill it.
Mark , you ever use or see the Man a fre disc e-brake set up ?comments please if so.
Any experience with the Man a Fre dog bone shackles where the bolt threads into one side of the shackle ?

very cool , so when you roll you get fuel shut off when you kill it.
Mark , you ever use or see the Man a fre disc e-brake set up ?comments please if so.
Any experience with the Man a Fre dog bone shackles where the bolt threads into one side of the shackle ?

Thread hijack DENIED!

Ignition. A nice feature of the Aisan carbs.

:)

So if I am getting run-on, is it my cut-off solenoid that is suspect?

you mean , Thread hi-jack of this old beat up , tired , carb thread is denied , oh bo ho .
Ease up hitler and answer the questions or don't , I don't see moderator under your name.
I was asking the person I thought might have some valued input , apparently he is out to lunch .
Come on , 1 little hi-jack never hurt.

Mark, 1st mistake was not having you do my carb rebuild. :( 2nd was because money was tight around x-mas I baught the kit myself and tried to rebuild it on the bench. :eek:
I'm having problems keeping fuel in the bowl. New filter(clear Kragen style, fuel in the filter w/ a little air on top), pump, and plenty of gas. I adjusted the float and everything. I get fuel for a little bit then seems to run what's in the bowl out and that's all she wrote. If you recall the pm it's a 74' 2 barrel w/ electric do-hicky. Sorry I was to cheap to just pay you to do it for me. Any suggestions? If it's easier to tell me over the phone, pm me and give you my number.
Thanks, hope this isn't under the hijack law. :confused:
Campy

Sniff? Sniff?






























































I think I might be smelling a new cage match here! I think you should PM mark with your hijack issues and get his direct opinion.


BTW: The springs are heading your way Mark.

And then there's the second tard special from GA, with a bolt screwed in where the fuel shutoff solenoid is supposed to be!

Maybe cus they don't make those where he comes from...GA. :D

Mark is accustom to my ramblings , he mostly ignores em so when he officially denied the hi-jack it meant he actually read the questions and has good info. and is withholding it just to make a point

So if I am getting run-on, is it my cut-off solenoid that is suspect?

Possible. I'd also be curious about temp [spontaneous combustion] and whether the truck is far enough out of adjustment [primary butterfly open] that it is capable of drawing down gas thru the venturi. When the Aisan is working properly, you should see NO GAS going thru the carb at idle.

[BTW-self hijack for Pablo: I finally 'found' that H55 article you asked about and submitted it to TT; it has been cleared for May/June]

Finally got the beadblast special done. What a nightmare! Accel pump discharge checkball was rusted to the checkball spring! The plunger was frozen in the discharge bore and I had to drill it out! And that's just the beginning! Fawking production rebuilders!

as for the hijack pees, I'll try to get something up on the FAQ in the next few days.

Possible. I'd also be curious about temp [spontaneous combustion] and whether the truck is far enough out of adjustment [primary butterfly open] that it is capable of drawing down gas thru the venturi. When the Aisan is working properly, you should see NO GAS going thru the carb at idle.

[BTW-self hijack for Pablo: I finally 'found' that H55 article you asked about and submitted it to TT; it has been cleared for May/June]

Do you mean coolant temp? I am running factory guages, but it never gets to halfway on the temp guage.
I have set mix and timing by vacuum - pulls about 17 inches, and I am at 5000' elevation.

What is my best way to ensure the primary is closing? Or adjust if it is staying open?

I can't wait to see the H55 article!!! Thanks for remembering my inquiry.

Thank you and kudo's for busting that feltching machinist loser.

I just bought and installed a good engine with a decent carb on my 83 FJ60. It worked wonderful for the first few weeks then lastnight it died on me. I have two fuel filters before the pump and pressure at the carb but I cannot see any fuel shooting into the barrels. It would idle but as soon as I touched the gas it would die. It will run great if I bottle feed it gas into the carb. Any ideas why it would suddenly stop? Is it a jet or frozen ball? I hope the inside doesn't look like all your pics.

I just bought and installed a good engine with a decent carb on my 83 FJ60. It worked wonderful for the first few weeks then lastnight it died on me. I have two fuel filters before the pump and pressure at the carb but I cannot see any fuel shooting into the barrels. It would idle but as soon as I touched the gas it would die. It will run great if I bottle feed it gas into the carb. Any ideas why it would suddenly stop? Is it a jet or frozen ball? I hope the inside doesn't look like all your pics.

Are you bottle-feeding into the fuel bowl or directly into the venturi? Perhaps you should start a separate thread where more people are likely to see your problem and comment on it.

A PM will get all fixed up!

So what is it with you guys. Pirate seems to have cornered the market on goofy carbs. Today's beauty has got some Motocraft looking fuel filter hanging off the front of it:

Pull off the air horn to find that the front of the fuel bowl is bent:

And then there's the matter of this funky looking stuff that has been purposely applied to the entire surface of the float, but which has now successfully contaminated every passageway in the carb! :barf:

I'd say it's a Swedish meatball. No, a kumquat.


hehe...I said kumquat.:D

No, a kumquat.


hehe...I said kumquat.:D

You said kumquat.

Huh huh...

That was cool...

Hahaha. Whose is that pos?


:emb:

Hahaha. Whose is that pos?


:emb:


Translated: Who's pos is that?

:barf:

Translated: Who's pos is that?

:barf:

Whose fits in my sentence structure. I originally had it as "who's" but it looked odd to me, so I did a grammar check and changed it. :flipoff2:


whose
adj.

1. The possessive form of who.

We need to change this to Pirate 4x4, AND School of Grammer, including active vs. passive writing styles.
Example:
My 40 was owned by that rock.
Vs.
That rock owned my 40.

Started the reassembly on Simon's new carb before I closed today. Found the big problem that made the PO give up: missing tension spring in the accel pump discharge chamber. :(

As I'm cleaning the parts to put back into the carb body, I find the idle mixture screw and say out loud WTF?

I have NEVER seen a screw bent this hard!

I've got a theory how this happened, but I think I would MUCH RATHER hear dd113s colorful thoughts on bent small parts first! :flipoff2:

Mark, you and dd113 know way too much about each other.:rolleyes:

:D

Yea, Walt, It's a regular 3000 mile love affair lately, isn't it?

None of these matched the customer's [campy] complaint, but all had to be fixed.

1.Missing inlet screen
2. Wrong slo-jet
3. Dirt completely plugging a/p discharge nozzle
4. HUGE GAP IN AIR HORN!:

Mark,
What happened to your yellow star? :grinpimp:

Mark,
What happened to your yellow star? :grinpimp:

I just sent Lance a regular e-mail about it. Something went electronically haywire last night, and I got an e-mail from Paypal about an automatic one year renewal on my initial red star subscription.

From what I can tell, not only did this f--k up my yellow star, but it locked up my mailbox as well.

So apparantly my one year anniversary on PBB will not pass uneventfully! :shaking:

Somebody asked about SSTs. This is one of my little treasures. The quarter next to the bits is to give you perspective

This week's mystery comes to us courtesy of green weany 78, who experienced a sudden loss of power. One of the first things I noticed once I had disconnected all the linkage was that the throttle didn't want to open all the way. Then I took a closer look and discovered that the main throttle shaft was badly bent! :eek:

I don't know if this happened in transit or not, but either way, I was able to straighten the throttle shaft out in the press. It turned out that the loss of power was coming from a sticking power piston that would not open the power valve. That and the missing stopper and spring in the accelerator pump discharge which made acceleration more difficult.

carb rebuilding humming along, with 4 carbs from the board last week. :smokin: This last one tho from a Cascades member is a doozy. One air horn screw frozen to the fuel bowl, sight glass cracked, slo-jet broken off in the bowl, secondary jet stripped, accelerator pump nozzle smashed shut, idle solenoid aborted, AND THE LIST GOES ON!

The only thing he told me about before sending the carb was that the fuel return line was stripped out on the top of the airhorn, which is already a big PITA. At this point, it would cost WAY MORE to rehabilitate this carb than to just start over with a better one.

Luckily for this guy, Georg already donated a compatable carb to the cause back in November which has been waiting for a good home.

http://forum.ih8mud.com/showthread.php?t=27752

So I will be collecting a few more dollars from this customer, and forwarding a check to FOTR at last. Good timing for all.

Yea, Walt, It's a regular 3000 mile love affair lately, isn't it?

Fast forward 4 months and now I'm yesterday's news with dd. Won't return my calls. Just another ex dumped out at speed on the highway I guess.

Anyways, the left coast just surpassed the right one for the 'deep sea' award. Amazingly enough, I think this one will still rebuild ok:

:grinpimp: Mark, greeting from Mississippi!

Quick question while on the carb thread....71 with a rebuilt carb will start run for about 3 seconds & die..you can hear the elec. fuel pump runnning but will not idle or stay running any ideas....I know send you the carb & it will be all better. :grinpimp:

Thanks for the mood music at Cruise Moab!!!

Check the ground and wires for your fuel cut solenoid. BTDT

And Mark, if you can bring that carb above back to life you are truly a carb miracle worker. :eek:

your thumb looks like it was in the dip too long! :flipoff2:


Oh yea that is a thumb. I first thought is was some gentile's member. :grinpimp:

Clemson cruiser takes the award for most clogged power valve:

BTW, I fixed up that 'deep sea' carb from a few posts back. No beadblasting, just good old fashioned elbow grease, and LOTS OF IT!

Lookin' good. Do you disassemble it further from there to clean individual parts? Or had you already?

Lookin' good. Do you disassemble it further from there to clean individual parts? Or had you already?

Thanks for asking Walt. This one was SO BAD that I had to take the outer tubes off the emulsifiers. I had to replace the power piston altogether because the shaft was badly rusted, and the slo-jet was completely clogged shut.

Here's a pic of the power piston:

Fast forward 4 months and now I'm yesterday's news with dd. Won't return my calls. Just another ex dumped out at speed on the highway I guess.

Anyways, the left coast just surpassed the right one for the 'deep sea' award. Amazingly enough, I think this one will still rebuild ok:

Thats UGLY.

I have been told by a buddy that works at a tank farm that some of these new emissions fuels have a couple potential problems that we started with here in Atlanta in the spring.

One is a problem with the fuel separating if there is enough water in the tank either at the station or the vehicle. Water and alcohol settles out to the bottom of the tank and now your pumping water.

The second is instances of the materials some floats are made out of rotting away.

Wonder if thats the cause of some of the problems you have posted including this?

Thats UGLY.

One is a problem with the fuel separating if there is enough water in the tank either at the station or the vehicle. Water and alcohol settles out to the bottom of the tank and now your pumping water.

Wonder if thats the cause of some of the problems you have posted including this?

Mostly the problem with these carbs IMO is that they've been sitting outside on motors that were pulled and left for dead during V-8 conversions and filled up with water in the rainy season. :barf:

SACRILEGE

Granted I've only done a couple dozen quadrajets, but I've never seen one that was subjected to a FIRE before! :eek:

Houston [I mean LandCruiserJunky] WE HAVE IGNITION! :eek:

hey Mark , I got some dishes that look about like that carb , got any plans for this weekend ? why don't you fly up or drive and we'll go on the 55 run . Leavin fri. afternoon. c'mon you know you wanna go.....

I think I found your problem:

please elaborate for us carb illiterate folk.

please elaborate for us carb illiterate folk.

Ahh! Well the pin sticking up in the middle of the pic is called a power piston. The small set screw and tab next to the hole are to hold the piston in the air horn assembly. As you can see in the pic, the screw and tab have nothing to do because the piston is stuck down in the bore, when it is supposed to be flush to the air horn because of the tension spring behind it.

Under light loads and high vacuum, there is enough vacuum being supplied to the backside of the piston to keep it retracted into the air horn the way it is pictured. When the truck is under a heavier load, the vacuum is not sufficient to overcome the force of gravity and the weak tension of the spring, and the piston then drops to the point where the set screw and tab should hold it.

When the piston drops, it pushes down on the power valve in the fuel bowl, opening it, which suppliments the amount of fuel in the primary circuit being provided by the primary jet.

Soooooo, to make a long story short, this piston is stuck in the 'closed' position. It would NEVER open the power valve, which would have left this motor with a pretty big 'hole' in its power band.

now thats a proper tech post right there biatch.

Somebody asked about SSTs. This is one of my little treasures. The quarter next to the bits is to give you perspective

And just for the record Mark, those bits arent just for carbs... they work great for drilling fingernails so that one can have charms dangle from them.. in fact my do that for the tin-benders in april.. i think chris even has a set that i can pilfer!!!!

Susan (mrs dhondagod):shaking:

And just for the record Mark, those bits arent just for carbs... they work great for drilling fingernails so that one can have charms dangle from them.. in fact my do that for the tin-benders in april.. i think chris even has a set that i can pilfer!!!!

Susan (mrs dhondagod):shaking:

There goes that shotgun seat!:p

Look forward to seeing you out on the trail.

The award for Al Jolson-blackface carb goes to our very own Orangefj45:

This is just the loose dirt that was in the fuel bowl:

Amazingly, it appears as if the carb had only been gone thru once before in it's whole 40 years. Luckily, it never saw a bead blaster, and the original patina was preserved under all that grime. This carb turned out SO CLEAN it is the first carb in a few years now to actually make me jealous! It's cleaner than the one on my 65swb! Treat 'er good Georg!