WS6FirebirdTA00

iTrader: (33)

when i did headers, i left the ipipe disconnected and fired her up to hear how i would like a cut out. but the car wouldnt idle after 2 tries. put the pipe on and no problems fired right up! why is this?

foff667

iTrader: (2)

odd i dunno as long as you cut out the rear o2's with predator i see no problem...christ on my s10 i just had headers for a 10 mile drive back to my house...didnt get a ses till like 2 miles into the drive and its a 98 so basically the same type of obd2 system.

ta12sec

iTrader: (3)

Thats really strange, I cant think of any reason, was the car cranking?

jrp

iTrader: (16)

dont know, i ran just long tubes and Y with no tuning for a week before i put my catback on.

Jabroni

When you tried the first cranking, were the front O2's connected? If not, the car would run real rough when it warmed up...if at all. The front O2's control most of the A/F issues.

WS6FirebirdTA00

iTrader: (33)

they were hooked up, car would not idle but would rev up. car had been sitting for about 8 hours if thats any help

WicketMike

iTrader: (13)

i have a similiar problem also. i have dual cutouts on the y-pipe and one one the i-pipe and when i try to start the car with the cutouts open its harder to stay idled.

Farmer2

iTrader: (168)

Every time you disconnect the Battery with mods like cam or headers minus y-pipe or such you will have idle issues.

Just do the idle relearn procedure.
I have pacesetter headers, cam and full cat back exhaust and the car willl not idle after the bat disconnect. I have to keep my foot on the gas at about 1200 to 1500 until the car goes close loop and then it will idle enough to do the relearn.

Good Luck

Colonel

Yep, your idle info had to be relearned by the PCM.

The rear O2 sensors have nothing to do with it whether you deprogrammed them or not.