Basically it won't go through emissions and the co and hydrocarbons are catastrophic.
i bought the car from my friend (he bought it from vinny). It had jdm ecu a mwr manifold into 1zz down pipe/cat and a team moon. My friend had a custom 2.5" down pipe and 200 cell cat put in mating up to the team moon as it was 2.5" already. He hasn't used the car for a year, so I've bought it from him and gone for an mot (I'm a tech at a main dealer)
It had the eml on but only just failed on co at fast idle 0.4 and should've been 0.3 or less, but the hydrocarbons were great, 54.
The eml was bank 1 02 sensor not switching at all so it got a new denso sensor and now no eml. But I now have 1.2% co and 450 HC even at idle. I've got the car hot (very hot!) because of the sports cat.
It's had oil and filter change (old oil stunk of fuel) and fresh shell nitro. Battery has been off and reset ecu. All vac hoses look ok and nothing will bring the emissions down.
I've got the exhaust shop to put a 400 cell cat in place of the 200 and it's still 1.2% co.
With the bank 1 sensor disconnected the co goes to nearly 8%!
With the after cat sensor disconnected nothing happens at all, no eml.
It's obviously running very rich indeed but I can't figure out why. I can't imagine a faulty new denso sensor? I have seen the bank 1 sensor goes in cylinder 4 primary on the manifold, I would've thought it needed to go after the collector??
I'm thinking I might have to power fc the car just to get it through the mot!
Any help greatly appreciated
Cheers
