So i just installed an indivia divorced wastegate dp and nameless catback exhaust on my 06 wrx. install went well except i could not get the o2 sensor out of the stock dp. temporarily filled o2 hole in the new dp with an m18 plug. (need to order new sensor). or if anyone has one... then used my accessport to stage 2 ariz/cal/nev 91. But now the car is running horrible. Car lacks power in lower rpms while trying to accelerate then finally kicks in for a jerky sputtering ride.. WTH?Need help please

 

well you took out the 02 sensor.....

 

no o2 sensor car will act the way it is now..

 

okay i am going to order a new sensor right now.

i need the downstream right?
this is a denso one im looking at.

 

if you take out a spark plug your car would run like crap...i dont see what the difference is. your car and its ECU is designed to run with an O2 sensor. without it, your car is telling your ECU that its not releasing exhaust gases, or if they are, WAY out of spec and WILL affect your engine performance. throw in that new O2 sensor and take her for a spin. ud be surpirsed at the difference. when i installed my tranny, i knocked off the speedometer sensor and ran without that. just a speedo sensor right? after 4k, t he car would buck and never ever reach WOT. installed new one and she ran perfect. hope info help. GL

 

thanks for the info i ordered an 02 sensor will be here on Tuesday hopefully that fixes the problem

 

Changed 02 sensor which took the code away although still was not running right. Turns out it was the fuel pump. Put a AEM one now it runs great.

 

I dunno, maybe try, er, resetting the ECU?

 

AEM fuel pump?

 

Crazy how everyone on these boards seems to have similar issues happen all at once. My legacy was having a similar problem, idled fine, revved fine in N, but drove like dog **** everytime I gave it more than 10-15% throttle. Super jerky and bucking back and forth in every gear anytime I hit the gas. Swapped to my old oem wrx fuel pump last night and all is well