Question about 1992 BMW 3 Series

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Where is the idle screw - 1992 BMW 3 Series

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Look at where the throttle cables attach to the throttle plate. ON the bottom side of the throttle plate there is a screws that it rest on when in closed position. You turn it clockwise to increase throttle and counter-clockwise to decrease.

Posted on May 07, 2010

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Idle adjustment at carburator end


most older cars had 2 adjustments , a air screw for enrichment and throttle screw for engine idle speed, later models did away with the enrichment screw, to adjust set idle screw to 600 rpm, adjust air mixture screw to fastest rpm , reset idle screw to preferred idle speed.

Oct 03, 2016 | Cars & Trucks

1 Answer

Set idling via screws


Most older cars had 2 adjustments , a air screw for enrichment and throttle screw for engine idle speed, later models did away with the enrichment screw, to adjust set idle screw to 600 rpm, adjust air mixture screw to fastest rpm , reset idle screw to preferred idle speed.

Oct 03, 2016 | Cars & Trucks

1 Answer

Setting the idle mixture, turn out screw till highest idling, then still turn out and the engin still idle smooth?


thats what happens when you change the set screws,idle set screws will bring it to an idle,when you are at that 1st point,where it idles fine,stop,your idle set screw is done

Jul 15, 2015 | Cars & Trucks

1 Answer

Idle adjustment problem


If the idle mixture screw ( idle screw) does not make a difference it is because the idle circuit is blocked . Check the jets for dirt / water . Blow out the system with compressed air.. The mixture is already set by the time it gets to the screw and you are only increasing or decreasing the volume allowed into the engine . There will be no "O" ring but there should be a spring under the head of the screw.

Jan 20, 2014 | 1994 Honda Accord

1 Answer

Adjustment Idle


There will be a screw on the throttle shaft that can be used to adjust idle rpm but you should find out why the idle mixture screw is not making a difference. Check for vacuum leaks in all the lines and manifold gaskets.

Nov 20, 2013 | Cars & Trucks

1 Answer

86 gmc k1500 5.7L just replaced carb and now cant get engine to idle


Check that you have replaced the vacuum line for the distributor to the base of the carby block. Turn the 2 idle mixture screws all the way in till they touck the bottom. Then turn both out about 2 full turns . Get the engine running and hold at fast idle and adjust screws until a steady idle is achieved . Allow to idle and screw each screw in or out slightly until even idle is achieved. You will hear the engine revs increase or decrease when you have gone too far so adjust to about the middle of turns

Feb 17, 2013 | Cars & Trucks

1 Answer

Where is the idle adjustment screw on a 1993 Toyota Camry 6 cylinder?


There is no idle adjustment screw on this engine, which is normal for EFI engines. The idle is controlled by the car's computer. It does this by controlling the Idle Air Control - IAC - valve, which should be checked in your case. See here p271

http://www.turboninjas.com/camry/eg2.pdf


There is a throttle stop screw, not the same, on the throttle body, which you may be thinking of, p263. This does not directly control idle speed.


Also the A/C, if any, can affect the idle if the A/C idle-up switch has failed. If testing this switch, do so when the engine is hot, as that is when they fail. See p295

Dec 11, 2012 | 1993 Toyota Camry V6

1 Answer

1986 dodge ram 225ci slant six and a single barrel holley carb


Start with the idle needle screw first, the idle mixture screw. Seat it all the way in, first-don't overtighten and damage it, just seat it lightly, and back out two full turns. Run the engine and set the adjustment by ear to get your best lean idle: start turning the screw in (clockwise) 1/8 or 1/4 turn at a time till engine stumbles, dies, or runs rough. Keep the engine running, and turn screw out (counterclockwise) a little at a time till you hear the idle dropping. Now between those two settings is your best lean idle. Turn the screw in, a little at a time and wait for engine to respond, tiill you get the highest idle speed. Now set the other idle screw, curb idle, to the idle setting for your truck, probably about 700 rpm. You can move back and forth between the screws to get the best steady idle. Just don't over do it on the idle mixture screw.
Good luck.

May 08, 2012 | Cars & Trucks

1 Answer

1993 Ford Ranger 3.0L V6 starts surging @ 33-34 mph and @ 1200 rpm. Tried to duplicate @ different speeds and rpm combanation but only does it @ these. Changed spark plugs, wires, cap, fuel filter and oil...


Hello:;
This sounds like a fuel problem at the carb. What it's doing is termened hunting a nd can generally be corrected by a simple adjustment of the carb. Engine at idle and neutral set rpms at lowest idle , around 640 rpms. then adjust the a/f ratio screws to balance carb. Screw both screws all the way in, do not force ,or needle and sear damage will occir. Now back each out to 1.5 turns That is your start point Adjust one screw in and out slowly until you you feel its best effact on ide whicjh should slightly increase. repeat with other screw, in and out slowly . listening to the engine idle. if idle has increase due to your adjustmebt, repwat process after lowering the idle speed again with the idle screw. When you get to the point the screws no longer affect the idle the engine show sound and run smoothly at idle, make sure you resert the idle to 650rpms for an automatic trans and 650-750 for manual trans. I hoped this helped- good luck.. If it still does it, the carb may nrrd the float checked and st.

May 15, 2009 | 1993 Ford Ranger SuperCab

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