catalisyt

26th February 2009, 18:40

my vts is decated at the moment and ive got the mot on monday, if i get the garage to put the cat on will it fail on emissions? i heard youve got to run the cat back in otherwise sensors dont reconise it?!

26th February 2009, 20:48

the sensors only recognise the gasses, ie the first senses how the engine is running/ how much emissions are coming out to adjust fuelling, the second detects wether the cat is working by reading cleaner air or not, hence why you leave it out when you de-cat so it reads clean air and fools the ecu. They can get through without the cat, some people on here have passed fine. also ask around see if someone local will be friendly and test another car instead of urs.

26th February 2009, 20:56

Sensors before the cat anyway, dont worry bout it.

26th February 2009, 20:57

Quote:

Originally Posted by sax-oli

the sensors only recognise the gasses, ie the first senses how the engine is running/ how much emissions are coming out to adjust fuelling, the second detects wether the cat is working by reading cleaner air or not, hence why you leave it out when you de-cat so it reads clean air and fools the ecu. They can get through without the cat, some people on here have passed fine. also ask around see if someone local will be friendly and test another car instead of urs.

mine failed last year with the cat, but he tested the emissons on another car because i had alot of work done there

26th February 2009, 21:05

just do it again maybs some ££ in their hand mite help them