High Idle adjustment Screw---any pictures of it?
04-16-2011, 12:11 PM
#1
High Idle adjustment Screw---any pictures of it?
Hey guys,
I want to adjust my high idle down on my 84 CC Qjet. It currently idles around 2700 on high idle. First kick down brings it down to around 2400. I'd like to adjust it down to around 2000-2200 ish for the high idle. I have tried following the descriptions of the adjustment screw, but I just can't find it. does anyone have an actual picture of the screw?
Also, I push the acellerator twice to set the idle, crank the car over and start it. Runs to high idle just fine but it won't come off the idle on it's own. I actually have to kick it down. Should it come down on it's own or is it supposed to stay up until I kick it down?
I want to adjust my high idle down on my 84 CC Qjet. It currently idles around 2700 on high idle. First kick down brings it down to around 2400. I'd like to adjust it down to around 2000-2200 ish for the high idle. I have tried following the descriptions of the adjustment screw, but I just can't find it. does anyone have an actual picture of the screw?
Also, I push the acellerator twice to set the idle, crank the car over and start it. Runs to high idle just fine but it won't come off the idle on it's own. I actually have to kick it down. Should it come down on it's own or is it supposed to stay up until I kick it down?
04-16-2011, 06:31 PM
#2
Supreme Member
Re: High Idle adjustment Screw---any pictures of it?
It stays high until you press the gas, which "unloads" the linkage and allows it to drop down to progressively lower steps on the fast idle cam, and eventually down to the curb idle screw on the other side of the carb.
When the engine is cold, step on the gas to allow the choke to close and the fast idle cam/screw to set up. Front in front of the engine look underneath the choke linkage between the choke housing and the main body of the carb (pass side of the carb). You will see a smallish hex head bolt/screw with a screwdriver slot (regular, phillips or sometimes torx) machined into it's face. That's it.
Adjustment is fairly quick. A 1/4 turn makes a pretty big difference in fast idle speed.
When the engine is cold, step on the gas to allow the choke to close and the fast idle cam/screw to set up. Front in front of the engine look underneath the choke linkage between the choke housing and the main body of the carb (pass side of the carb). You will see a smallish hex head bolt/screw with a screwdriver slot (regular, phillips or sometimes torx) machined into it's face. That's it.
Adjustment is fairly quick. A 1/4 turn makes a pretty big difference in fast idle speed.
04-17-2011, 03:04 AM
#3
Re: High Idle adjustment Screw---any pictures of it?
It stays high until you press the gas, which "unloads" the linkage and allows it to drop down to progressively lower steps on the fast idle cam, and eventually down to the curb idle screw on the other side of the carb.
When the engine is cold, step on the gas to allow the choke to close and the fast idle cam/screw to set up. Front in front of the engine look underneath the choke linkage between the choke housing and the main body of the carb (pass side of the carb). You will see a smallish hex head bolt/screw with a screwdriver slot (regular, phillips or sometimes torx) machined into it's face. That's it.
Adjustment is fairly quick. A 1/4 turn makes a pretty big difference in fast idle speed.
When the engine is cold, step on the gas to allow the choke to close and the fast idle cam/screw to set up. Front in front of the engine look underneath the choke linkage between the choke housing and the main body of the carb (pass side of the carb). You will see a smallish hex head bolt/screw with a screwdriver slot (regular, phillips or sometimes torx) machined into it's face. That's it.
Adjustment is fairly quick. A 1/4 turn makes a pretty big difference in fast idle speed.
04-17-2011, 04:21 AM
#4
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Re: High Idle adjustment Screw---any pictures of it?
Thanks! It doesn't progressively step down, it'll drop the one time, then it won't drop again no matter how many time I try until it's warm enough to drop down to curb idle. But that's cool, I just wanted to make sure something wasn't messed up on it. Now I know. I do seem to recall my first car, a 85 Mazda with a carb that I had to kick down to take it off high idle as well.
You can immediately kick it down from 'super fast idle' to 'fast idle' at anytime. It will however stay on 'fast idle' untill the choke springs heats up enough to allow you to drop it down to curb idle.
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