leprecaun96

For the government emissions test they have a low idle and a hight idle test (high idle being they hold the engine to approx 2750rpm). My car is failing on high idle on carbon monoxide, whether feedback is on or off. Anyone know if i took fuel out of the cells around that point will it bring the CO down? Or do I have to put the cat back in (de-cat pipe fitted), in order to pass this damn test?

Ok, so when its on, are the maps setup on the pfc ignored? Reason i ask, when on monitor, i dont see the ign timing that the map is set to for that specific rpm. ie the map is set to 28' ign for idle yet under monitor the timing is 15' ... this is with feedback on.

Maybe someone can clear a couple of things up for me.. Ive read when tuning the fuel maps with the PFC that the O2 feedback should be turned off. ok, but should it be turned back on after tuning is finished ? Also, the o2 feedback loop, is it more economical to run with it on or off ?