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I have a 1999 zL 440 it runs fine @ 2500 rpm or higher but if it idles down the only way to clear it out is to lift the choke one notch I already put fresh gas and cleaned the carbs???

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Please do not take this the wrong way and I am going to walk you through the process so you can understand and it is actually an easy fix.

(a) Your Carburetors need to be cleaned,
(b) Jet in your Idle Jet or Low Speed Jet is Too Big
(c) Damaged Needle an/or Seat.

There is 3 orifices that need to be cleaned and requires a wire be fed through the hole on EACH of them. The issue you have obviously is Fuel Related and not understanding what was where when it was started makes it harder.

Completely disassemble the Jets and make sure the Needle and SEATS are in good condition and not damaged, a bad seat will cause it to flood out as you are describing. A TOO BIG JET will do the same thing.

Posted on Feb 12, 2014

  • clyde quinlan
    clyde quinlan Jun 22, 2014

    it dont seem like its flooding its not smoking

  • Todd Arndt
    Todd Arndt Jun 22, 2014

    It has nothing to do with Flooding, it has to do with the "Passage of Fuel", the Idle Control Jet allows the Sled to Sit and Idle, if the Idle Jet (which is much smaller) is blocked or restricted. If you REV the Motor, what is happening is the Fuel is now going to the Primary and you have Fuel traveling through the Seat and Needle. The Idle Jet is not controlled by the Seat, I bet if you clean that Jet, your problem will go away.


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