7 replies to this topic

[Trick77]

Guys,

 

I have a '95 Spi and have just put on a new manifold and exhaust system from Maniflow. I took it to its MOT and the emissions failed showing

 

Fast Idle

 

CO =2.15%

HC = 103ppm

Lambda = 0.959

 

I know you get a lot of these emissions problems but just after the most sensible course of action in a kinda play by play.

 

Its running rich. Is there a possibility i have the pressure sensor on the wrong hole on the inlet as i have a vacuum gauge on one and the MAP sensor on the other. (theres two holes on the back of the inlet)??

 

Cheers,

 

Rich

[v8rumbler]

was the engine good and warm before test

[Trick77]

Yeah, all warmed up from the drive over! 

[markperkin]

Had the temp gauge moved, mine failed on emissions last week, I noticed the temp gauge hadn't moved from the bottom.

It's in today for the retest.

[Trick77]

Yeah. It hist the middle of the gauge dead on. Ill have a re check though of the temp sensors and cooling system

[billzer]

my mpi was a nightmare to get through i changed temp sensor , cheap lambda sensor not so cheap and cat everything dropped hc ect and passed ,

[reallybig]

mine failed emissions and got fked by the garage after they decided to change the cat lambda sensor exhaust manifold gasket.....

 

still didn't pass

[Fast Ivan]

logic would dictate thats it llinked to the recent manifold change, assuming all was good before.

That said I would suggest hooking it up to a diagnostics reader to see if the sensors are firstly working and secondly operating within the correct parameters.

Also, and I think opinion is devided on this, the lambda may well be better placed in the Y piece of the LCB. I have drilled and welded a boss in mine to take the lambda, I haven't moved the lambda yet as I want to see if it does make a difference to emissions, however my mate did the same, it failed the emissions so he moved the lambda and the emissions were fine.