Hello all it's been a while!
Anyway here's the skinny of what I'm doing. I've got an 01 five speed that currently have the guts ripped out of and building a stroker for that is getting close to slamming it back in. I would really like to switch to the 2000 1/2 and later exhaust system in this; ditch the pre cats and have two 02 sensors and one large cat underneath. I'm wondering how feasible this is? I actually do have an ecu out of a 2000 (634AF). So this going into a 5 speed the ecu doesn't have to talk to the trans ecu. I'm wondering about the wiring aspect mainly for the ignition and 02 sensors. Correct me if I'm wrong the coil rail will wire up the same with the plug in the back of the coil rail but which 02 sensor is going to be the new single one to use? Or is it just prove them out when I have power to the truck again? Anyones insight who has done this is much appreciated thanks!

 

My 99 has upstream and downstream o2 sensors.

 

A24 and A25 are bank 1 upstream and bank 1 downstream.

 

Never done this but have poked around about changing my '00 CA Emissions XJ to a Federal.
Even sourced the ECM and the engine harness.
Out of the 2 in there the one with the fuel injector connectors on it.
I think the 2 rear O2 sensors, the ones closest to the firewall, on a 4 O2 sensor CA Emissions XJ
are the same part number and the 2 used on a Federal Emission '00.
Was always kind of under the impression that with an ECU auto or stick mattered 2.
Thinking if you tried to use an CA Emission ECU with only 2 O2 sensors that the ECU would be looking for the other 2.

 

Where have you been?

 

Pete your a good man! I've been busy breaking jeeps and getting ***** deep into the Volvo world and let me tell you they will not let you disappoint! Good to hear from ya brotha!

 

I'm doing Alfa Romeos again!!

What kind of Volvos? I set up a Weber on a 544 last weekend.
Ever heard of YoshiFab?

 

I got really into the P2 Volvos mostly the S60's. They just blow me away at how fun and capable they are all while looking like a nothing car. I will warn though I told the GF the other day that the people that own Volvos are middle aged women and men that are a glutton for financial punishment.