Gunson G4074 Colortune Single Plug Kit 14mm

Product Information

Fortunately, many systems also have the facility for a limited amount of self diagnosis, and give fault code information in the form of a blink code (a number indicated by a flashing led) or more complex forms of data transmission. A float and valve arrangement to maintain a steady fuel supply level (or a sensitive pressure regulating diaphragm) The Colortune plug kit is a simple and effective way to tune petrol and LPG 2 and 4 stroke engines. It is easy to use and works on the principle that the combustion flame burns a particular colour depending on the fuel mix. The Colortune is a spark plug with a glass insulator viewing window so the flame is visible. The colour of the flame inside the cylinder shows the state of the air:fuel ratio - yellow indicates a rich mixture, blueish-white a weak mixture and a Bunsen blue flame a balanced mixture. By adjusting the mixture screw to get the correct flame colour the engine can be tuned for optimal fuel economy and performance. The kit also includes a viewscope with adjustable mirror so that the flame can be seen where engine access is restricted. Fits most petrol engines with additional adaptors available for vehicles with other sizes of spark plug. Variations in mixture between the cylinders are easier to see and faults can be more easily spotted and rectified. The following description of fuel systems is intended purely to identify the various types which may be encountered and to highlight the basic features.

I originally saw this product advertised in the BMW MOA Owner's News by Bing Agency International (BAI). They claim that this product enables you to "adjust your carburetors precisely". It does so by providing you with what is essentially a spark plug with a transparent insulator. The transparent insulator enables you to see the color of the combustion while carburetor adjustments are made. This is much like adjusting the color of the flame of an oxy-acetylene torch. On these engines limit the total test duration to 5 minutes and avoid extended running at high rpm. Often the information requires further analysis as the system does not recognize mechanical problems only the effect on electronic items and will show for example a lambda (oxygen) sensor or lambda control system fault in the case of inlet or exhaust manifold air leaks. Colortune is available only in a short reach thread length but it may also be used in long reach applications without any problem.NOTE:A multi-cylinder engine with a carburettor (or injector) to each cylinder and a single exhaust system can not be thoroughly tested with a gas analyser at the tailpipe. The analyser only gives an average fuel mixture indication for all cylinders and no warning of large mixture variations due to setting errors or indication of other faults. When there is too much air in the mixture, it becomes more difficult to ignite, burns slower, and is therefore less efficient. This one was removed from a used plug by a mechanic in a local car garage and given to me. He used quite a lot of force so its possible this type isn't intended to be removed. It has a "male" threaded portion which screws into the top of the plug. This type does not fit the end of the Gunson adapter, which also has a male threaded portion. Modern engines with multipoint injection systems, and earlier high performance car engines with twin or multiple carburettors, have a lot in common with the example of the motorcycle given previously. I've been buying NGK spark plugs for my bikes for 35 years and they ALWAYS, ALWAYS come with a removable screw-on nipple. On the vast majority of bikes, you need to remove the nipple because the caps are designed to connect to the threaded portion.

One exceptican is the Ford SOHC Pinto engine ( I970's ) which was 18mm size (adaptor available) and recently some vehicles have been introduced with smaller sizes due to space restrictions on smaller 16 valve engines. A rich and easily ignitable mixture is also provided for starting a cold engine. If a manual cold start device (choke) is fitted, a yellow flame should be visible in Colortune when this is operated. Fits most petrol engines in standard form with additional adapters available for vehicles with alternative sized spark plugs. Extension H.T. lead incorporating an end suitable to connect either Champion or Continental Bosch type suppressor caps (clip or thread). The development of sophisticated electronic control systems plus a robust exhaust oxygen sensor allowed the three way exhaust catalyst to be introduced.

These leaner settings progressed with engine developments to give economy with low exhaust emissions.

The complete Colortune kit is also available in the following options: G4171 (with 12mm Colortune Plug) and G4172 (with 10mm Colortune Plug). I've been buying NGK spark plugs for my bikes for 35 years and they ALWAYS, ALWAYS come with a removable screw-on nipple. " As I said in the original post, I'll probably be able to get one eventually after CNY (everything is currently closed), though I have been told (by Taiwanese mechanics, who do tend to be full of it) that it won't fit.I have used one for years ( a normal, single kit), its just a case of working your way along the carbs and tweaking the settings, or rejetting as required. Its easier if the carbs are balanced first, but you will have to balance them again afterwards. It takes a while doing a 4, but its do-able. Zo kan het benzineverbruik, de uitstoot van schadelijke gassen worden verminderd en werkt uw motor goed At idle, engine instability and misfiring may occur before this weak mixture and pale shade of blue is fully visible.