Do I have to retune the Power FC when installing a Greddy Pulley Kit and removing the Air Pump. I have already removed the cat and put on a Mid-Pipe.
Please let me know what I should do ?

 

Anybody know anything on this subject, help me out rotor guys
thanks......

 

that won;t really affect anything, the pulley just frees up HP, but putting less strain on engine. Don't worry about it. Your airpump isn't doing anythign right now anyways.

 

KZ1, thanks for your reply.

 

With the air pump not working, turn off the O2 idle control function under the ETC-Function menu.
Without the air pump the exhaust gases will be richer and with the O2 function on, your engine will idle lean. That is why you turn it off.

Think about it!

 

the o2 sensor is ahead of the old cat where air went in from pump. If airpump is still hooked up and ACV system of to snuff. WHy woudl it idle lean, I wouldn't think it would change anything

am I way off here?

 

The air pump also pumps air into the exhaust port, before the O2 sensor.

 

Thanks all for your reply's.

 

so if i have maps setup for midpipe along with other mods.....and i run a high flow cat obviously with the air pump still hooked up, will i have a lean condition at idle?
how lean if so???
dangerously lean?

does it richen back up under throttle???

i just got a pfc tuned from SR for midpipe, but i will be often running a high flow cat with the air pump if im not at the track and in times when i need to have the car street legal for emmissions and skeptical pigs....

thanks

 

chuck,

are you referring to the Idel-IG Cntrl
OR
02 F/B Contorol
??