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Vw carburetor adjustments - Golf Volkswagen Cars & Trucks

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How do you adjust idle speed 1991 johnson 100 hp


not important, what's important is that they are absolutely clean, including the four brass high speed jets located in the bottom center portion of the carburetor.

That model engine's carburetors has fixed jets, BUT if the slow speed jets are adjustable, earlier model carburetors have been installed. If so...................

The four adjustable needle valves control the flow of fuel in relation to the set air flow, adjusted as follows (if needed).

(Dual Carb V/4 With 4 (2 each carb) Slow Speed Adjustable N/Valves)
(J. Reeves)

The adjustment procedure of the carburetor slow speed needle valves follows. NOTE... if the needle valves turn too freely, replace the nylon bearing retainer (the nylon item at the front of the carb that the needle valve goes through first) with the newer type RED retainer #315232. If your engine has that weird linkage that connects all four of those needle valves, the newer RED retainers will enable you to discard that linkage. The RED retainers make it impossible for the needle valves to vibrate out of adjustment.

(Carburetor Adjustment - 2 Slow Speed Adjustable Needle Valves, each carburetor)

Initial setting is: All (4) Slow speed valves = seat gently, then open 1-1/2 turns.

Facing the carburetors, start with the top left needle valve, then the top right valve, then the bottom let valve, then the bottom right valve. It may be necessary to redo these steps to get the adjustments ideally set

Start engine and set the rpms to where it just stays running. In segments of 1/8 turns, start to turn the S/S needle valve in. Wait a few seconds for the engine to respond. As you turn the valve in, the rpms will increase. Lower the rpms again to where the engine will just stay running.

Eventually you'll hit the point where the engine wants to die out or it will spit back (sounds like a mild backfire). At that point, back out the valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest slow speed setting.

Do not attempt to gradually adjust all four of the valves at the same time. Do one at a time until you hit the above response (die out or spit back), then go on to the next valve.

When you have finished the above adjustment, you will have no reason to move them again unless the carburetor fouls/gums up from sitting, in which case you would be required to remove, clean, and rebuild the carburetor anyway.

Jun 28, 2017 | Cars & Trucks

2 Answers

Auto choke not cancelling when engine warms up , causing over revving


Brynn, Check all wires, linkages are attached and vacuum lines, clean and lubricate linkages and butterfly and check for free movement, if equipped with a heat stove pipe make sure it is not damaged and is attached. Below links tell how to adjust on various models.
to show your appreciation press the helpful button and follow me on fixya for more tips and info.
electric choke adjust


https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwjFhJ79pvrKAhXHuIMKHZ61BmcQFggeMAE&url=http%3A%2F%2Fwww.vw-resource.com%2Fchoke2.html&usg=AFQjCNE9z8ga5bdVmAGGBCcraVvmFT2e3g

Adjusting Automatic Chokes Semi Universal Approach

Adjusting the Carter BB Carburetors

Feb 15, 2016 | Cars & Trucks

1 Answer

The clutch peddle on my vw polo is very loose and is hard to get into forward gears and grinds into reverse what could it be ?


Pedal

Your clutch needs adjusting. The information is here. You can also Google
VW Polo clutch adjustment
And click on Videos and you will see tutorials on YouTube.

http://www.vw-resource.com/clutch_adjust.html

Dec 23, 2015 | Cars & Trucks

1 Answer

How do you adjust idling


Idling is adjusted differently on different vehicles. There are diesel engines, and two main types of injection, either from a high pressure pump to the injectors, or the so-called common rail injectors where injection is supplied by a high pressure pump but controlled by electronic signals.
Gasoline (petrol) engines have either carburetor systems where the carburetor turns the fuel into a gas before it enters an intake manifold which supplies the intake valves with combustible gas, or a common fuel injector which does basically the same, but the gas is produced by a single computer controlled sprayer. The final way of getting gas into the cylinder is to use injectors similar to diesel injectors, such as the VW Jetronic or K-tronic system.
Idling is adjusted on most engines by controlling the amount of gas which is allowed by a butterfly valve to pass into the intake system.
On an old style carburetor there is an air needle valve at the base of the carburetor which must first be adjusted to get the correct gas/air mixture necessary for the engine to idle, then the butterfly stop screw, which is also mounted on the base of the carburetor, but which is open to see. This will physically open or close the butterfly valve to increase or decrease the engine rpm.
However, we are moving more and more into the era of computer control, and the best answer to your question is, Take It To A Specialist!

Aug 14, 2014 | Cars & Trucks

1 Answer

Carb overflowing on 1990 vw polo


Pull the carburetor off and rebuilt it, the float is stick or the fuel inlet valve is defective. The carb kits come with full rebuilding instructions, but if you have never done a carby overhaul it is best left to a professional.

Oct 01, 2012 | Cars & Trucks

1 Answer

The car periodically stalls out


1 Inspect Carburetor Dirty and Improperly Functioning Carburetor. 2 Inspect Carburetor Incorrect Carburetor Adjustment. 3 Inspect Carburetor Worn, Faulty or Damaged Carburetor.

May 22, 2010 | 1993 Buick Regal

1 Answer

2001 VW Jetta Headlight adjustment. Headlights


sometimes the headlights stick to the adjusters,just pull/push(wiggle it)to free it, then try setting beams.

Apr 14, 2010 | 2001 Volkswagen Jetta TDI

1 Answer

Choke stuck in closed position1984 VW Rabbit


Hi !
Firstly see if the choke wire is stuck from inside itself or from the Carburetor side.
To check this you will need to pull - push the small knob on the Carburetor where the choke wire is attached. If it moves freely then the choke wire is stuck in itself.

If it is stuck from the Carburetor side then you could use a spray like WD40 to free the leaver.

Else disengage the wire from the Carburetor and pull the wire out from the inside. Clean the wire and lubricate it by using any good lubricant (engine oil works the best). Then slowly push the cable back and fasten the wire back with the Carburetor.
Regards
Berry.

Feb 01, 2010 | 1984 Volkswagen Rabbit

1 Answer

Can't find the carburetor of vw passat 1990y, 1800 cc, because expends to much.


Early 80's VW discontinued using a carb and started using mechanical fuel injection, 90's it was sureley using electronic fuel injection so you won't be able to find a carburetor.

Jan 19, 2010 | 1990 Volkswagen Golf

1 Answer

1986 vw cabriolet won't idle after it has been warmed up. It runs fine if it has been sitting not running for a while. But, once it's been driven a bit or warmed up it will not idle. I'm not much of a...


Check for a vac. leak. First listen for a whistle or a high pitch sound if you have any fix them. You can get a can of carburetor cleaner and spray around the vac, hoses even the big one on the brake booster unit and the back of the master cly.

Jan 23, 2009 | 1986 Volkswagen Cabriolet

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