I have an escort mk 6 1.4 fuel injection year 1995.Today I went for the mot and it failed on the emission test CO is at 0.54% and Lambda is at 1.036%.Can someone please tell me what could the problem be. I changed the cat and lambda about 4 years ago too

 

4 years is a long time for a lambda sensor, especially a non OEM one.

And likewise, pattern cats are often crap compared to OEM.

 

so you thing its either one of these the problem i have ?

 

Was it driven hard before being tested? The cat needs to be really hot - can make the world of difference.

 

It could be a dozen things including either of those.

Test the sensor to see if it is working, or just replace it and test emissions

 

well i did drive it to do some errands before i went to test it but was almost stuck in traffic the whole time.I am taking it to someone to check it out on monday will see what he finds now cause i aint going to start buying parts if im not sure . The lambda sensor cost 90 euros from bosch too

 

a few are listed, seems mostly wire length changes as opposed to sensor.

http://www.lambdasensor.com/main/bos...tem=0258003485

Any decent mechanic should be able to test if the sensor is responding correctly though

 

what do you mean by wire length changes ?

 

length of wire on the sensor.

 

does it make any difference if lenght is not as original one

 

Well..only if it doesnt reach lol

 

ok well today the mechanic i took the car too tested the car and he told me that the lambda came up faulty but than he changed the lambda for another one and went to check the emissions and co was still high.He than disconnected the air filter only just after the maf and the car went crazy.It started to act up on him for example when he grabbed the maf and move it around still connected the co either went too high or dropped a bit .He is thinking the maf is going bad.Any ideas now ?

 

Find a better mechanic ?

And airflow meters arent generally designed to be thrown about the place.

Has he checked the unit itself to see if it's output is sensible ?

 

i didnt say he throwed it about the place he just grabbed it still attached to the inlet going to the throttle body and moved it abit

 

Airflow meters and their air filter/pipework are carefully designed to promote smooth and even airflow over the sensor. If you start waving one about introducing turbulent air, then they cannot work correctly. Some will be more fussy than others.

Yes there may also be a problem with the unit, this is why rather than waving it about a proper test would be conducted.

 

anyone know where i can buy these types of sensors instead from where i live which is malta please.Everything is to much expensive here

 

Would the link I posted above sell abroad ?

A generic 4 wire sensor shouldnt be expensive ? Ł30-40 But really, test properly before buying.

 

the link you gave me is only for lambda sensor i need one that has maf etc just in case i need to buy one if it is really faulty.These sensors need to buy them as new not used

 

Ahh right.

I'm not sure of any cheap reliable sources for MAF's.

Often you will find that cheap aftermarket replacements are just shite and not worth buying. You may get lucky, but it is often the case.

But again, test to see if all is well before throwing money away.

 

I am trying to get a hold of a maf to try and see exectly if mine is wrong or not but was checking on a site onlinecarparts.co.uk and found some mafs etc in it but not oem some brands like vemo vaico hella etc and was wondering if any of these are any good they are not that cheap but they are cheaper than oem for sure.I know the oem lambda sensor is made from bosch so thats not a problem but i would like to know what brand makes the oem mafs

 

If it doesnt already say on it....could be a few makers.

But again, just have the mechanic test it before buying.

 

i dont think oem ones say who the manufactor is on them

 

ok maf tested and its ok he also checked the injectors and found them good and he said the last thing we can try is changing the catalytic converter.I went to change it right after i got the car back from him so will have to see tomorrow hope everything will go fine cause than we are at a loss

 

still bad news guys still failed mot on high co even after new cat fitted