I install a week ago, and start car no cel. Drove few miles cel came on, and it went away. Just came on again while driving to work should I be worried?

 

Did you do an 02 extender?

 

check your o2 sensor

 

I didn't think I needed the extender, and I will take a look at it this weekend.

 

Or you can disable rear o2 with evoscan like my buddy did for me.

 

seriously?

u put a test pipe in place of a cat and you didnt think you need to correct the rear o2?

the rear o2 is to check the effective efficiency of the cat. make sure its doing its job, you removed the cat. so of course the efficiency of the cat is zero, its not there so its not doing its job, thus cel.

u can do the mechanical fix ie o2 extender
or you can disable in ecu.

 

I thought the test pipe already had cel fix with it already.

 

Even with extender, I've seen mixed results. Best bet like mentioned above is to access the ECU and defeat the code.

 

I"m using an extender with my test pipe , no cell going for 5 years now.

 

(knock on wood) I have not had a cel issue with the extender.

 

Thanks I will order the extender today.

 

Why order one? You can pick one up at a car parts store like NAPA or Autozone and be done with the light today

 

extender FTW.

 

I have the extender on mine and zero CEL.

 

^^^+1