I can't boost lower than 14-15 PSI and I think my O2 sensor is out

[Kracka]

Ok, but will the 02 sensor affect my car in any way? I want to know so i can store it or drive it.

Sell your DSM and get a Civic with altezzas, it would be a perfect fit for you.

[94talonawd]

Reread the god damn post. It says "I think my o2 sensor is out." All i wanted to know if it was my o2 sensor or something else. I dont have much free time to repair the damn car. That was why I wanted to know if it was still ok to drive it or not so i can store it or not. This car is my daily driver. I am just trying to save the hassle of doing replacing every part to figure out that none of it was what i needed to replace. Im just trying to cut to the chase and get others opinion on it. So dont post if you have nothing good to say.

[94talonawd]

Oh yea, and my cars not half assed just to let you know. And I trust my boost controller that I made. Who here doesnt make thier own custom shit for a dsm.

[niterydr]

Ok, well i was driving my car today and i just noticed that my O2 readings are not accurate anymore. When I am at idle, my O2 is at 5.00 Volts. When I am driving it around it jumps from 1 volt to 2 volt. I'm pretty sure my O2 sensor went out. Will this affect my car in any way?
Your o2 voltage is off, sensor is probably dead. In the manual, which you should own if you work on your vehicle yourself, there is a procedure to test for restistance values. It will affect your car, as the majority of your car's operation is based off it.

My other question-
I cannot get my boost any lower than 14-15 psi. I dont know why. I made a custom boost controller. I am 100% sure that everything is hooked up right. Also, my Injector d/c is maxed out to 105%. I need to lower my boost! I have a 3/S fuel pump in my car, I was wondering if this was causing me to not boost any lower than 14-15 psi.

The fuel pump size should not MAKE YOU run a amount of boost. If its way oversized, it could mess up your tune and the ability to tune, but running xxx fuel pump doesn't automatically make the car run xxx amount of boost. They are not directly connected to each other in that way. They are components of seperate systems, that are interconnected in your vehicle, which eventually connecting to your motor. I had a 3kgt pump in my auto, running 11psi of boost off the factory bcs...everything was gravy. Your boost controller is sticking and failing. Too stiff of a spring? Sticky ball? Kinked line? Something is out of whack. Maybe your wastegate actuator is bad?

Well the mod list is on my signature. Can you guys tell me whats wrong? I've ran out of ideas.
Yes. See above. Also, running open downpipe isn't the most effective way of making power on a street car.
With the stated 1/4 time, either your car has severe tune issues, or you need to drive the car in a different manner.
Good luck.

[94talonawd]

Ok, i found out the issue on the boost. I hooked up the lines straight to the wastegate actuator. It isnt the boost controller. My wastegate actuator spring is bad.

Well, when i ran the car at the track at 14.6 @ 83 MPh, It was all stock. The mod list i have right now was after i ran the 1/4 mile. Also, my timing was off a teeth when I ran the 1/4. It is all fixed now.

[Shane@DBPerformance]

Why would you want to run less than 15psi anyways? When you make the intake and exhaust paths less restrictive, you often can't run very low boost on an internally gated turbo, even the stock ones.