i know this isn't a z problem but could do with some quick advice from some of the many experts on this site.

 

my 94 celica has just failed mot on emisions only. garage reckons it may be the cat :cry:

results were

fast idle

 

co = 4.25% FAIL

hc = 124ppm PASS

lambada = 0.89 FAIL

 

2nd fast idle

 

co = 3.52% FAIL

hc = 119ppm pass

lambada = 0.90 FAIL

 

natural idle

co = 0.34 pass

 

now i've just fitted a k&n induction kit, could this mess up emissions?i know the co levels are way off. also is there anything i can do to get emissions down enuff eg. fuel additives etc.

 

any help would be greatly appreciated.

 

cheers

 

nick

sounds like a dead O2 sensor (or lambda probe ;)). the voltage should change which keeps the car in a "closed loop" mode, continually richening & weakening the mixture to maintain a level

 

Thanks for that paul, saved loads of wasted time trying other things,which wouldn't have worked by the sound of it. new o2 sensor for me then. ouch ££ :slap:

 

 

cheers

 

nick

do u think its worth trying to get an o2 sensor from a breakers(tight git eh?) i should imagine import & uk would be the same as long as wires match or should i just bite the bullet and get a new one, if i can.

 

 

nick

So long as you only have one duff O2 sensor on a zed you should be ok on an mot, just get em to test it on the good exhaust pipe. Thats what I did!!!

So long as you only have one duff O2 sensor on a zed you should be ok on an mot, just get em to test it on the good exhaust pipe. Thats what I did!!!

 

well legitimatley they shouldnt!

on a twin exhaust system they should take readings from BOTH sides, then average them out ;)

So long as you only have one duff O2 sensor on a zed you should be ok on an mot, just get em to test it on the good exhaust pipe. Thats what I did!!!

 

This one's on a celica m8 so there's only one. just changed the sensor which seems to be reading correctly wiv a volt meter. am just about to take it for a retest so fingers crossed.

thanx again for all the help and advice folks.

 

cheerz

 

nick

This one's on a celica m8 so there's only one. just changed the sensor which seems to be reading correctly wiv a volt meter. am just about to take it for a retest so fingers crossed.

thanx again for all the help and advice folks.

 

cheerz

 

nick

 

fingers crossed for ya bud ;)

fingers crossed for ya bud ;)

 

 

 

IT PASSED!!!!! mind u did have to take it for a blast to get co level down ;)

 

thanks again paul, owe u a drink sometime bud. :duffer:

 

 

nick

no problemo :)