Join Date: Apr 2003
Location: Auckland, New Zealand
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Re: help!! engine not running right...
Does your Zuk have a ballast resistor in the ignition circuit?? If so a buggered balast or a problem with that circuit will cause what you describe...
Starts ok, because ballast resitor is bypassed when starting, then, as soon as you let off the key the ignition goes though the ballast resistor and the motor dies.
I've had this before, but not on my Zuk, as shes a '85 and hasn't got a ballast resitor.
I just re-read your post, and I think you mean is will keep running if you pump the throttle? Right? If so, it's probably not the ballast.
I also had a similar problem to this when my idle jet got blocked with some crud. I just won't idle, and hardy runs at all below about 1500rpm. Goes fine above that though.
After I cleaned the idle jet out it went fine (after I figured out I hadn't plugged the idle fuel shutoff solenoid back in.)
Could also be a dodgy fuel pump not supplying enough fuel, low float levels, or like everyone says, vacuum leaks.