1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Carb questions

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Old 09-04-10 | 06:14 PM
  #26  
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3RD week!? Wtf I'd be running the joint after a day! LMFAO! Yes the tips. Go on sterlings site he has info on it.
Old 09-05-10 | 12:54 AM
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Originally Posted by JoeNoble
Yes I work at az however it's my third week and this is my first carb rebuild. So I need to burnish the tips of the needles that go down inside there? Correct?
I would call them the 'corners' since the tip is rubber of some kind. the needle shafts are square shaped inside a round hole, so the four corners are the parts rubbing against the seat.
Old 09-05-10 | 09:10 AM
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Originally Posted by Jibaro 12A
Yes the tips. Go on sterlings site he has info on it.
Wrong

Originally Posted by Oneiros
I would call them the 'corners' since the tip is rubber of some kind. the needle shafts are square shaped inside a round hole, so the four corners are the parts rubbing against the seat.
Right.

It's the rubber like tips that seal/shut off the gas, don't mess with them. The 4 square corners are what hang up in the seat tube due to machining burs.
burnish/polish these burs down and the needles won't stick.
Old 09-05-10 | 10:11 AM
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So just use a rotary tool with a small polishing wheel on it?
Old 09-05-10 | 10:57 AM
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Originally Posted by JoeNoble
So just use a rotary tool with a small polishing wheel on it?
i think that would remove too much. i just use a razor edged knife and lightly scrape the surface until its shiny. trying it sterlings way, with the oil and rubbing with a polished surface, never worked for me, but i may not have been doing it right.
Old 09-06-10 | 12:11 PM
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Originally Posted by trochoid
Wrong



Right.

It's the rubber like tips that seal/shut off the gas, don't mess with them. The 4 square corners are what hang up in the seat tube due to machining burs.
burnish/polish these burs down and the needles won't stick.
meant the same thing.
Old 09-13-10 | 12:04 PM
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will my choke function if i strip my car according to these instructions?


Old 09-15-10 | 12:42 AM
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Yep
Old 09-15-10 | 01:41 AM
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no reason wh it s houldn't. just make sure you have the water temp switch in the rear of the water pump housing in good order. if its bad or the wires are corroded or broken, the choke will work but will retract instantly instead of being held open until the engine is warm by the choke magnet.
Old 09-15-10 | 08:37 AM
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yeah i have to prop mine out. got i pic of what your talkin about so i can check mine?
Old 09-15-10 | 09:26 AM
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Is this the one your talkin about?

Mines plugged in but the connections are corroded.
Old 09-15-10 | 10:11 AM
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thats the one!
Old 09-15-10 | 10:55 AM
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I guess my real question is what minimal parts are absolutely necessary for my choke to work? So is that the only thing that's required to make the choke stay out on it's own? I don't mind propping it out but it would be nice if I didn't have to.
Old 09-15-10 | 11:43 PM
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Originally Posted by Oneiros
if you have an early manifold with cross cut runners it might help cross cutting the spacer.
vac secondaries wont work with it cut like that though will it?
Old 09-16-10 | 12:39 AM
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Originally Posted by JoeNoble
vac secondaries wont work with it cut like that though will it?
Yes they will work fine.
Old 09-16-10 | 12:49 AM
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ehhh i think ill leave it alone other than removing the heat shield
Old 09-16-10 | 12:52 AM
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Originally Posted by JoeNoble
I guess my real question is what minimal parts are absolutely necessary for my choke to work? So is that the only thing that's required to make the choke stay out on it's own? I don't mind propping it out but it would be nice if I didn't have to.
That is a temp-sensing switch that is on below a certain temp and off above it (60 celcius). As long as that circuit is connected, power is supplied to the choke magnet below that temp which holds it open.

IMO there is no need for a lot of other choke stuff, I remove the butterflies and everything except the fast idle mechanism. This simply pushes the throttle open as the choke is pulled out.

Here is a pic of the fast idle mechanism (modified slightly)


Last edited by Oneiros; 09-16-10 at 12:55 AM.
Old 09-16-10 | 01:06 AM
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gotcha that's cool that'll clean the carb up a lot but just outta curiosity why remove the butterfly? my sensor is hooked up but my choke doesn't stay out on its own. I read in an old thread that there's somethin near the choke **** behind the dash that may have come unplugged so I'm gonna check that out tomorrow.
Old 09-16-10 | 01:41 AM
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Originally Posted by JoeNoble
gotcha that's cool that'll clean the carb up a lot but just outta curiosity why remove the butterfly? my sensor is hooked up but my choke doesn't stay out on its own. I read in an old thread that there's somethin near the choke **** behind the dash that may have come unplugged so I'm gonna check that out tomorrow.
Well it's not needed, plus it looks like it would cause a bit of a restriction at the inlet so it might as well go
Old 09-16-10 | 01:45 AM
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sounds good to me. how did you plug the holes left by the rod?
Old 09-21-10 | 10:41 AM
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ECU questions

Ok so I was trying to figure out why my choke wont stay out on its own so i replaced the assembly under the dash as well as the cable with no prevail. I was gonna replace the sensor that's in the water pump housing but I thought some one said it might be the ECU and I thought that might be easier to replace (or at least i wont spill half a gallon of coolant while swapping that out. So could it be the ECU? how hard is it to swap it out? and can I use the ECU out of my 83 GS in my 83 S?
Old 09-21-10 | 12:24 PM
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Two wires connect to the no. 1 water temp switch. It is the one on the back of the thermostat housing. The black /white wire should have 12v when ignition is turned on. The Blue/white wire goes to the choke magnet in the dash control. When the car is cold the sensor should connect the two wires and energize the choke magnet, holding the **** where you put it. If you connect the two wires in the harness plug together the magnet should stay energized whenever the car is on. If the magnet works this way, but not with the sensor plugged in (when cold), then the sensor or its wires are bad.
Old 09-21-10 | 12:28 PM
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so i should try bridging the wires in the connector where it plugs into the sensor? and if the choke stays out then the sensor is bad. gotcha ill give that a try but if that doesnt keep the choke out then what else could it be?
Old 09-21-10 | 12:29 PM
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I forgot to answer your question. The ECU does not effect the operation of the choke magnet. All 83 ECUs are the same.
Old 09-21-10 | 12:36 PM
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alright thanks ill go make a jump wire and give it a try later. so is that pretty much the only possible culprit?


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