Janspeed 4-2-1 + sports cat fitted.. ECU light on !!!!!!

1. wiggyk1 Frequent Poster Joined: Sep 2007 Luton Posts: 997 fiat punto 1.2 8v/ Saxo VTR ph2/vauxhall astra/fia

   #1 16th November 2011, 20:17

   Hi everyone had a Janspeed manifold + sports cat fitted and after driving say 10 miles the Engine management light has come on, does anyone know why this is???
   
   car drives fine by the way.
   
   Thanks
2. bigdazza Infrequent Poster Joined: Oct 2011 colchester essex Posts: 155 Saxo vtr with vts conversion :)

   #2 17th November 2011, 16:27

   Could be the lambda sensor in the cat pipe. They normally come on when the cat is removed tho.
3. wiggyk1 Frequent Poster Joined: Sep 2007 Luton Posts: 997 fiat punto 1.2 8v/ Saxo VTR ph2/vauxhall astra/fia

   #3 17th November 2011, 18:10

   any ideas on how to get the light to go off???
4. bigdazza Infrequent Poster Joined: Oct 2011 colchester essex Posts: 155 Saxo vtr with vts conversion :)

   #4 17th November 2011, 18:36

   Is your engine a 3 plug ? If it is, the second lambda that goes into the cat pipe should have a sleeve on it, check to see if it does, If it doesn't it could be that. It sends a signal to the ecu for the emissions, as far as far as I kbow you can run the car fine with this issue, but don't quote me on it. My old vts used to do it as i put a decat pipe on and the 2nd lambda didn't have a sleeve, so I brought a sleeve, put it on and it fixed it.
   If it runs fine this could be the problem especially if you have just had a new system.
   Hope this helps a little.
5. KamRacing Saxperience Addict Joined: Nov 2006 A farm shed in Aylesbury Posts: 14916 Corolla AE86 Peugeot 205 B18C (in bits)

   #5 17th November 2011, 19:20

   The second lambda should cope with the sports cat. Unplug it, tie it temporarily and safely out the way and see what happens.

   1 user thanked this post: logic_guy
6. wiggyk1 Frequent Poster Joined: Sep 2007 Luton Posts: 997 fiat punto 1.2 8v/ Saxo VTR ph2/vauxhall astra/fia

   #6 17th November 2011, 20:27

   Well i check out your theorys sunday guys. But i had a decat mani on the car before i swapped to the janspeed one and the light was not on. Does that help. Fucking cars!