What is Lambda?

When i go through the process of CNG fitment along with Lambda and TAP it seems very complicated.1st of all it is dependent upon so many things along with good workmanship which normal person will not know.And every CNG fitment centre will claim they are the best ,how to identify the good guys?

And to add to that CNG available only in cities more so in north india it will be useful in City travel.And i feel CNG fittting must be reducing the resale value.

Point is -Is it worth to take so much extra effort with risk of leakage?

Friends, I am in a fix. Just happened to check out the CNG manual that i had got with my accent. Going through the location diagram of the kit's components, the manual mentions one of the components as the 'timing advancer' but no where mentions the location of the lambda equipment. I chkd up the engine compartment and found out that the equipment mentioned does not lok like the TAP, may be its the lambda. Can i safely presume that this would not be the TAP and go ahead with adding one.

Can someone pls confirm if the company (retrofitted) accent CNG comes with only a lambda or the TAP or a combination of both. The delaers and the ASS do not have a clue on this which is so very shameful. They react as if I am talking planes rather than cars.

Pls help clarify this doubt.

How to best describe Lambda in layman's language? IMO, the difference is like Automatic Climate Control and regular a/c. In ACC, you provide a reference. e.g., 20 degree C and electronics of control system takes care of rest. If you are not satisfied with 20, you change it to say 18 or 22 and electronics will take care of rest again. ACC is a closed loop system, where as regular a/c is an open loop system. So Lambda will take care of changing atmosphere condition during summer and winter, whereas without Lambda, you have to see a mechanic to keep your FE constant.

amit has put it beautifully

in simple language ... all machineries need some periodic maintainance for their continuing good performance which we refer to as tuning or servicing. an lpg or cng system also requires this periodic tuning for optimum performance

in the standard kit .. the tune up every 2-3-4 months or less or more, is done manually by the lpg/cng mechanic and this system is known as the open loop system

an add on electronic device to the standard kit can be installed known as the lambda control system, whereby the functions of tuning the car are done automatically by the lambda, minimising the need for periodic manual maintainance.   systems working with the lamda are popularly referred to as the closed loop systems. lambda cannot correct faults or deficiencies in the engine ... it only adjusts the gas system to some such faults or deficiencies

thus, lambda does not altogether do away with the need for professional attention, as in the automatic control system of an ac. lambda only minimises such need.  professional attention is still required periodically to maintain the gas system to correct the faults and more particularly to safeguard against possible gas leakages

there is another drawback .. lambda is complicatedly wired to the sensors and ecm of the car. if water or moisture contact takes place or there is a short circuit .. th gas wiring could blow off the sensor or the terribly expensive ecm of the car .. besides sometimes when the car stalls for these reasons .. the car may not work on both petrol and gas and may require towing. 

i have mostly used lpg .. always without the lambda .. and have always been the happiest. but i understand that lambda is advisable for cng kits as in the absence of lambda cng tends to require very frequent tuning sometimes in less than a month and that becomes quite irritating

I know Lambda as Air fuel ratio, and it should be ideally near to 1. The Engine control module will sense the value of lambda and increases or decreases the fuelling to achieve Stoichometric ratio. You can get this installed from any authorised cng kit dealer. (checkout www.ecogas.in )

Dear All,

I just got CNG installed in my beloved Honda City ZX, but unfortunately there is a check light which has started to glow. CNG fitter is not able to get it corrected and rather trying to convince me that this problem would remain in all Honda City cars fitted with CNG. As per them, check light is due to the strong sensors of the car which detect additional wiring systems installed as a result of CNG fitment. Also, they suggest that if LAMBDA is removed the problem of check light will go off. I do not know whether I should do this. My Car otherwise is performing well both on CNG and petrol, it is only the check light which glows when the Car is running on CNG, which bothers me a lot. Can anyone suggest solution to this problem and whether removal of Lambda would actually help in getting check light to go off and no drop in the performance of the car on CNG.

hi 

previously i was facing this problem...........this error comes due to wrong wiring.... properly wired  lambda and advancer solve all the problems. my cng wala is a big f**k ...then i visited Mehta CNG karol bagh, near idgah...u can find his exact address from just dial ...u go straight from liberty cinema towards jhandewalan ....i will be ur right side....most of cng fitter are cheaters..

dont take risk and visit to good CNG mechanic....i have 2 cng cars both r performing well.