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Help, head lights making revs go up....
Posted: Thu May 08, 2008 7:05 pm
by Mud Toy
Hey guys, i am in a bit of a pickle, I got in my zook today to take it for her first drive after repairs ( clutch, starter, alternator c/o, half cgae fab) and i turned the head lights on and the revs pick up about 1250rpm above idle.. Just picking some brains before i start ripping and tearing again, i am thinking the control solenoid on the carby maybe shorting tino the head light harness...
Posted: Thu May 08, 2008 7:16 pm
by ronoor
mine does the same 'and if you turn the heater fan on also' i find it good for hill starts so i have left it .cheers ron
Posted: Thu May 08, 2008 7:35 pm
by joeblow
idle up control vacuum solenoid, located in front of the carbie, is adjustable.
Posted: Thu May 08, 2008 7:48 pm
by foolsp33d
pic show idle up solanoid and adjustment screw...
searching for carb issues etc within the zuki forum should give lots of remidies.
Posted: Fri May 09, 2008 8:07 am
by lay80n
From memory normal idle is about 700 rpm, and idle up is about 900rpm.
Layto....
Posted: Sun May 11, 2008 7:02 pm
by Randamonia
If you have the standard Carb try disconnecting the idle up - a green connector block (on UK specs anyway) - easy way to see if it's the source of the problem.
Posted: Mon May 12, 2008 10:58 am
by Pinball
Short version,
it's sposed to do that... just not that much.
grab a manual and adjust idle up to suit.
Spock
Posted: Mon May 12, 2008 6:28 pm
by alien
"normal" idle is 950 isnt it? mines always run better at 1000rpm idle cos i dont have the idle up on my weber, and it seems at 1000rpm the idle doesnt drop, even when running highbeam, spotties, compressor and stereo... but when i set idle to 900ish rpm itll drop down around 800 with accessories on.
Posted: Mon May 12, 2008 8:39 pm
by JrZook
Focus on that side of the carb on Fools pic. Run the engine and get someone to turn the headlights on. You'll notice one of the vacuum actuators moving and holding the butterfly shaft open. Simply track which actuator is moving and controlling the idle under electrical load (there will be a vacuum hose running from the actuator on the carb to and electronic solenoid with a green plug) and adjust the screw the presses against the throttle shaft so when the headlights are turned on the RPM is equal to that of when their off ~850-900RPM
Cheers Dan
Posted: Tue May 13, 2008 9:03 am
by lay80n
alien wrote:"normal" idle is 950 isnt it? mines always run better at 1000rpm idle cos i dont have the idle up on my weber, and it seems at 1000rpm the idle doesnt drop, even when running highbeam, spotties, compressor and stereo... but when i set idle to 900ish rpm itll drop down around 800 with accessories on.
From manual - 850rpm at NOT - Step 1 idle up 950 rpm, step 2 idle up 1050rpm (all + or - 50rpm).
Layto....
Posted: Fri May 16, 2008 10:57 pm
by Mud Toy
Cheers guys all sorted..
Posted: Sat May 17, 2008 8:14 am
by Nev
Yep, and just to add a little trick, I have wired up the solenoid on mine to a switch instead of the headlights and heater and cranked the idle up a fair way. Switch on = effectively a hand throttle for hill starts and maintaining crawling speed on hill climbs, works great!