mannyls1m6

iTrader: (1)

I just got my tsp stainless headers and y pipe. I ordered a pair of 02 sensor extensions. what do I do to no have any codes show up??

scotty2000ss

iTrader: (2)

Black tape or a light bulb delete.

99Bluz28

iTrader: (35)

You need to either get O2 sims or have the rear O2's tuned out.

nuntheweiser

I got my pcm tuned from the guy at lt1swap.com (for a ls swap) which included rear O2 delete for $75. Might be steep for only bypassing the O2's but I don't show codes and the guy gets it returned quick.

01ssreda4

iTrader: (96)

Spark plug non-foulers. Reinstall rear o2 bungs in your exhaust, screw in non-foulers, then screw in rear 02s. They should not be able to tell you now have no cats. This keeps you from getting flagged as not ready if they read the PCM.

scout2000

I'm having the same guy at lt1swaps.com do the same for me, and several other thing on my Gen III swap into a MY1970 truck.

01ssreda4

iTrader: (96)

No you don't throw a code but the system will show not ready if they do a computer scan. You may be allowed one not ready and still pass however. We don't have that bullshit here so check with your specific state.

soundengineer

iTrader: (16)

In hptuners...
Set dtc to 3- no error reported and leave the ses checked

It will auto pass the test and no codes will be set.

Burken01

iTrader: (88)

Good advice, thanks

Jontall

HP Tuner is the only way if your state plugs into your computer to check for codes.