22r with weber 34 dieseling and has extended crank while warm
#1
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22r with weber 34 dieseling and has extended crank while warm
i recently bought a 87 pickup that was barley running, got a good deal on a weber 34 so i put it on and did a desmog. It runs and idles well, but when i go to shut her off she wants to keep running. Also if i shut it off and come back 10 min later it has a hard time starting and i really have to bring it back it life (revving to clear it out) when it begins to start.
-it has brand new plugs/wires
-ive set ignition timing to 0 degrees
-idle seems to be set properly(screw it backed all the way out but it seems to be idleing under 1000 rpms)
-Idle mix turned out approx 2 turns
the weber 34 does not have a fuel cut solenoid, and im kind of at a loss ive read maybe try installing a fuel pressure regulator?
i called the weber north america hotline and the guy on the phone suggested that i set my timing between 8 and 12 degrees (seemed like a lot to me) anyone have any insight?
if only it ran as good as it looks!!!!!
-it has brand new plugs/wires
-ive set ignition timing to 0 degrees
-idle seems to be set properly(screw it backed all the way out but it seems to be idleing under 1000 rpms)
-Idle mix turned out approx 2 turns
the weber 34 does not have a fuel cut solenoid, and im kind of at a loss ive read maybe try installing a fuel pressure regulator?
i called the weber north america hotline and the guy on the phone suggested that i set my timing between 8 and 12 degrees (seemed like a lot to me) anyone have any insight?
if only it ran as good as it looks!!!!!
#3
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Do you have a picture, or can you get a picture of where the passenger side idle jet is installed? Possibly even what the screw looks like inside? If the 34's use the same idle jets as the 32/36's you could just order a fuel cut solenoid for the 32/36 and install it. A fuel pressure regulator might be a good idea, too, but I'm not sure if the 34 Solex's(I guess they're not really made by Weber) have the same issues with higher pressures like the Webers do. I would kind of think so, though. Very similarly designed. Some people have had good luck running 32/36's without a regulator too, though.
Edit: Nevermind, looked up the idle jets and they appear different. Maybe your idle jet is too large? Is it running rich at all?
Edit: Nevermind, looked up the idle jets and they appear different. Maybe your idle jet is too large? Is it running rich at all?
Last edited by JonnyBoy; 02-25-2011 at 01:34 PM.
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it smells a little rich but i have the idle mix set to baseline settings (2 turns out), this is my first carbed vehicle so im kind of running out of ideas, should i leave the timing advanced or revert to factory specs? adjusting it didnt seem to make any difference as far a the dieseling.
thanks
thanks
#5
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I have found my 22r to run better with a little timing advance, I think about 6 is where I'm at now. The 34 is a synchronous(both barrels open at the same time) carb, right? Is there an idle mix screw on both barrels?
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no the 34 is a progressive carb, there is only 1 idle mix screw, i have it 2 turns out from screwed all the way in.
thanks for any help...where can a get a decent fuel pressure regulator?
thanks for any help...where can a get a decent fuel pressure regulator?
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#8
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Holley regulator is what I use and you might jst need a fuel shutoff solenoid. I did. SOme have not. Some will argue you should need one, but even the factory carbs had one. Has to be a reason is how I look at it.
Not sure if they make one for that solex 34/34 though.
Not sure if they make one for that solex 34/34 though.
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where did you get your regulator? is it just a universal type? I dont know if there is a place on the 34 where i could add a cut solenoid, there has to be something im overlooking!
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I had the dieseling problem in a very similar situation. After weeks of tying all sorts of things I figured it out. I found that the spring that closes the throttle was too weak to fully close for the new carburetor position. Added a new spring and the dieseling stopped for good.
This was on an 85 2wd with same carb and desmog switch.
This was on an 85 2wd with same carb and desmog switch.
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you say your throttle return spring was weak? or is there another spring somewhere, i added a throttle return spring already because if i push it to the floor it would stay there!
thanks for all the help guys, i cant wait to get this lined out
thanks for all the help guys, i cant wait to get this lined out
#13
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yeah I had to add a supplemental spring as well to mine, but till I put the cut sol on it still dieseled down.
This is on a brand new motor too. Well rebuilt.
This is on a brand new motor too. Well rebuilt.
#15
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what about a motor with 8,000 miles on it? doubt enough carbon build up on the pistons to make a difference like that.
Typically a dieseling motor is because it's over hot (not overheated) Usually from running a little lean or too hot of a plug.
Could be ignition related too but that run on is usually due to aftermarket ignitions. Not sure if that kinda of problem can happen with the toyota igniter system.
Typically a dieseling motor is because it's over hot (not overheated) Usually from running a little lean or too hot of a plug.
Could be ignition related too but that run on is usually due to aftermarket ignitions. Not sure if that kinda of problem can happen with the toyota igniter system.
#17
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haha no no that is my mileage, not the O.P's. But issue was the same. O.P. I don't think mentioned his mileage, but yes carbon build up can cause a dieseling too if it's bad enough. Mainly because it changes the compression ratio of the engine making the unburnt fuel in the cyl burn easier. Wouldn't hurt to seafoam and see if it helps.
Last edited by xxxtreme22r; 02-26-2011 at 06:32 AM.
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seafoam sounds like a good idea, im running the ngk plugs that my local carquest recommended to me, the motor has about 144xxx on it....i hope that does the trick, it seems to be getting worse the more i drive it....if it were carbon buildup though wouldnt it have dieseled with my stock carb on it too? does anyone have a picture of a fuel cut solenoid installed so i can see where and if adding one would be possible
thanks a ton!
thanks a ton!
#19
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I have a dieseling problem with a stock carb on an 81 22r. I also have a weak throttle return spring, may I ask where you got yours? I went to the stealership and they didn't have one. *End Hi-Jack*
#20
I had trouble getting my Weber 34 to run right too. I took off the factory fuel pump, made a block off plate, used a 4PSI electric and haven't looked back. Plus, when you start it, all you have to do is set the choke and let the fuel pump run a little and it starts right up! I just wired the pump into the green factory plug that was attached to the original carb. That is also where I got power for the electric choke.
Hope this helps! Very nice truck BTW
Hope this helps! Very nice truck BTW