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Sticking Throttle
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My throttle has started sticking. If I back of the accelerator, the say when shifting, car sticks at about 2000-3000 rpm. I can get it to return if I quickly press then release the accelerator pedal.

So I guess it's either the carby or the cable. The carby is quite new with about 500kms on it.

Any thought on how to troubleshoot this?

Posted on: 6/13 6:29
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Re: Sticking Throttle
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Disconect the cable from the carby and see if it still sticks when revved from the carby.

If not check the cable.

Most likely the carburetor

Posted on: 6/13 6:52
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Re: Sticking Throttle
No life (a.k.a. DattoMaster)
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Good idea to test it. Had this happen to me too

Posted on: 6/13 19:52
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Re: Sticking Throttle
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Yes so it looks like the throttle link on the carb is stiff. I lubricated it and it helped a little. Needs improvement though. Maybe a second or heavier return spring, or loosen the nut?

Posted on: 6/14 1:58
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Re: Sticking Throttle
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It's a common problem with the Weber downdraft (throttle linkage nut is too tight). But I haven't heard of it being a problem with the Hitachi carburetor

Posted on: 6/14 7:26
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Re: Sticking Throttle
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I should have mentioned; it's a near new 32/36 weber, and the issue developed after about 500kms.

Posted on: 6/14 7:48
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Re: Sticking Throttle
No life (a.k.a. DattoMaster)
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An actual Weber or a copy? Heard heaps issues similar with the copies

Posted on: 6/14 8:45
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Re: Sticking Throttle
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Genuines have the problem. The nut should only be tightened a little and then there will be no problem

Posted on: 6/14 10:16
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Re: Sticking Throttle
No life (a.k.a. DattoMaster)
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I've had this happen with DGV's as well, the throttle sticks, so I loosened the nut & it then fell off. I've found there's a difference between the weber supplied nut & the Nissan one. The Weber one had a bit of drag on it, probably by design. So I used a Weber nut, plus a second one to act as a lock nut. I could also have used the locking tab that came with the standard carburettor.

Posted on: 6/14 13:11
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Re: Sticking Throttle
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Forgot to update this one:

The nut seemed to be adjusted correctly - finger tight plus 1/6 turn. I removed the nut and carefully reinstalled it to just finger tight. The throttle still sticks unfortunately. In fact the nut might even be a bit loose - I can move it a bit with my fingers, but it's locked down with the tab so hopefully it stays put.

I ended up fitting a second spring and it's ok now, but didn't really find the cause.

Posted on: 10/19 4:09
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