Lambda Confusion on Ford Ikon!!!!

hey everyone,

now this would be really confusing, i have a ford ikon flair 2003 model and got a BRC cng kit installed on it, i also got the lambda sysytem and time advancer installed. The car is running properly though there are jerks on first and second gears on lower rpms which is maybe an adjustment needed or requires a change in driving style compared to petrol. One thing is for sure I feel like with the lambda and the time advance the car actually runs a bit better then on petrol specially with the AC on. I have not driven a lot untill now as it has just been two days since i got the kit.

The real thing now, I was just looking up in the internet for some information on the internet and came across a review of my car when it was launched and there I found that my car has some Bosch oxygen system with a closed loop LAmbda system, so now I really dont knw if the two lambda systems can coexist together, i dont want my ECM to get confused between the two and then get blown up coz replacing it wud mean some serious bucks.

waiting for your response

n here's the link to the review   http://www.autonagar.com/cars-reviews/ford-ikon-flair-review-97.html

cmon guys reply to this query, it would be really helpful and any suggestion is most welcomed

The Lambda sensor is one of the sensors required for your ECU to decide just how much fuel must go in thru the injectors.  The lambda sensor's input to the ECU tells the ECU how much fuel is being used via exhaust gas monitoring.

Its like having a Pollution Control Unit built into your ECU and the ECU constantly reading from it and tweaking your Air-Fuel mixture. If it’s rich it will reduce the injector duration itself, if it is lean it will increase the injector duration itself, and it will do this constantly, making many adjustments every second to keep the air fuel ratio maintained at our specified levels regardless of engine load and throttle input. Its job is simply ensuring the fuelling stays at the chemically correct ideal ratio of 14.7 parts air to 1 part fuel. This ratio is known as Lambda 1.

This constant monitoring and adjustment cycle is called "Closed loop lambda control" and it is a very basic form of “Electronic intelligence” for the engine management system. The 'Closed Loop' monitoring became a requirement after the introduction of catalysts to cars - catalysts require the Air-Fuel Ratio (AFR) to be at Lambda1 (14.7 : 1) so as not to spoil the catalyst.

I havent used an LPG/CNG car before so I'm not sure if the LPG/CNG system comes with its own Lambda sensor - I really doubt it, unless the AFR for LPG/CNG is different from that for petrol.  Therefore I will leave that part of the question for someone with LPG/CNG experience to answer.

thanx for your reply but I am sure that there is a new lambda in my car for cng now, it is visible when i open up the hood

the afr for a CNG running car is higher than petrol as this is a gas low lubricity fuel. every new car has a lambda sensor and i dont see why u dint use the bosch one to start with. I guess it was a fault on the part off the chap selling you the sensor at the time. if you're new and excessive secsor is not in touch with you're ECU you would run a constant afr.

and no u cant blow the ecu if its nor picking up and extra channel or missing it out on one all together . Zero feedback.

Im sure the CNG kit come with some sort ems (engine management system) itself. Contact them and ask for a solutuion. the second sensor might be a gas type or something where as the old factory fit can not detect gas. one used on petrol other used CNg.

hope this haphazard note helps 

thanks for the reply, I appreciate it. I would like to confirm that everything is good now and the car is running pretty well. I am going to make a detailed post

Its a misconception that a t pipe sort of thingy is misunderstood as LAMBDA,beacause we are told so!

But the fact is its a small Unit just like your emulator and timing advancer.

Fucntion:well to breach the sensors from the engine exhaust[O2 sensors going to ECM],to signal the ECM that the Cold exhaust temp isnt there at all[Due to combustion of CNG being carried out at considerable lower temp hence the exhaust gases also lack high temp,thereby signaling ECM that something is wrong with the ENGINE mechanism.

So in total its better rather healthy for engine to get LAMBDA fitted in the car so that ECM doesnt go mad!

Its better to send wrong signals and calming down the Brain not to interfere,when actually CNG is helping you at one end of spectrum,without LAMBDA,makes engine more susceptible to less engine life overall.

Why?

Here is the answer,apart from exhaust sensing capability,it also ensures how much Gas the engine is demanding when you pushing the pedal hard.

Gas/Petrol actually also acts as a lubrication,

Improper air-gas/air-petrol mixture can amount to friction when the combination is altered to unhealthy proportions.

Not only this,your pollution control will also be lost.

In nutshell LAMBDA is the SUBBRAIN of your engine controling and managing amount of gas to the engine through AIR intake valve.

GOVT also mandates use of LAMBDA,and you need to have them if at all you dont want your RC approval for CNG+PETROL get invalid/Void.

Newer version of CNG kits[premium] are also under development and RnD stage where Direct CNG injection system is utilised to minimise the Power loss and Exhaust emissions.Pretty neat.

They might be available for near 75k in india.

I know someone fitted with the same.I know him thorugh the guy who fitted me the CNG kit.

Who he is?

Well the man behind the retrofitments,He is checking the pros and cons of Direct CNG injection before making them available to people without much fuss.

CNG has its own LAMBDA ie its own brain, when lambda (CNG) is installed in a car they put IAC motor in the pipe from cng vaporiser to intake. This IAC motor moves up & down so as to regulate the cng going in the intake manifold so as to reduce the wastage & make maximum use of the power. The more you accelerate more cng is allowed in the manifold & at idling it reduces the intake you can check this by opening two screws on the IAC motor & then accelerating while the motor is in your hand.Lamda itself costs around 5-6k,but definately enhances performance by reducing wastage 

hi.. i am having a ford ikon 1.3 clxi nxt 2003 model. i am planning to fit CNG in it.. can you please advice me. I am from mumbai. i have come to know that for ford cars its not good.. once you fit cng it has backfiring issue... is it true...??? how much average will it give on cng..

hi.. i am having a ford ikon 1.3 clxi nxt 2003 model. i am planning to fit CNG in it.. can you please advice me. I am from mumbai. i have come to know that for ford cars its not good.. once you fit cng it has backfiring issue... is it true...??? how much average will it give on cng..