alternative 0 Posted October 19, 2006 Hallo everyone. I'm now running a XU9JA/D6B engine in place of a XU9J1/DFZ in my CTi. I'm thinking of fitting the Lamda probe into the non cat downpipe in order to achieve better mixture control. Anyone tried this? Thanks for any light down a rather dark exhaust Share this post Link to post Share on other sites
cybernck 402 1 Cars Posted October 19, 2006 if i haven't misunderstood - you can't do that as the ECU doesn't have that capability. maybe there's something wrong with your AFM though? which one are you using - D6B or DFZ? Share this post Link to post Share on other sites
Gentrix 2 1 Cars Posted October 19, 2006 If your CTI had the Lambda before and you still use the DFZ Ecu, you must have the Lambda sensor, otherwise your Engine will run with wrong informations and not give you his full potential. Share this post Link to post Share on other sites
welshpug 1,657 Posted October 19, 2006 yup, if its still got the lambda capability but not one plugged in itll be in a limp home map, not very good for the engien as IIRC it'll run rather lean to protect the cat. Share this post Link to post Share on other sites
cybernck 402 1 Cars Posted October 19, 2006 well i assumed that if he went the lengths of changing the engine and downpipe, that ECU, AFM etc would be XU9JA's too. Share this post Link to post Share on other sites
alternative 0 Posted October 21, 2006 I'm using th AFM, distributor and ecu from the more powerful non cat engine. But although more powerful it doesn't run quite as sweetly as the cat version. As I've still got a wire for the lamda I was thinking of welding a lamda boss into the usual place in the downpipe and using the cat ecu. Hopefully this would give the power of the older engine with the better mixture and control and better running of the cat version! What does anyone think? Share this post Link to post Share on other sites
welshpug 1,657 Posted October 21, 2006 you would be better off using the original AFM for the system, what you've done is basically installed a higher compression "fast road" version of your old engine, as it has a "hotter cam". Share this post Link to post Share on other sites
alternative 0 Posted October 25, 2006 Why would I need to use the afm off the cat engine if I'm now running a non cat engine? Cheers Share this post Link to post Share on other sites
alternative 0 Posted November 4, 2006 I have now welded the boss for the lamda into the downpipe. Performance seems the same but it definitely uses less petrol and sounds crisper. So, XU9JA/D6B running XU9J1/DFZ ecu and lamda (without cat) seems to work well. Nice snappy motor Share this post Link to post Share on other sites
welshpug 1,657 Posted November 4, 2006 Why would I need to use the afm off the cat engine if I'm now running a non cat engine? Cheers because you're still using the CAt engines ECU and stuff! but looks like youve got it running nicely with the lambda fitted no need to d*ck about with the afm screw and all that for MOT time! Share this post Link to post Share on other sites
alternative 0 Posted November 4, 2006 Oh I see what you mean about the afm - but it runs well actually. Thanks everyone for your help Share this post Link to post Share on other sites
