running rich after 02 housing install

[lachy21]

Hey guys, I recently installed a 2.5" Megan Racing o2 housing and Im running rich. I checked for intercooler pipe leaks and everything, but its still running rich. The cars turns on fine, but the mixture of air/fuel is off because the smell is horrible. When I WOT the car bogs and missfires and doesn't pass 10 lbs of boost. Im still running on the stock t25, could that be the case?? Please help

 

[turbosax2]

Did you do a proper boost leak test?

 

[Nekoni]

Reset the ECU and try again is always my answer after installing a modification. Let the computer relearn itself for a little bit (My car is a damn smoke screen after I reset mine, it corrects itself within 5-10 minutes). I agree with turbosax2 though, you need a proper boost leak test anyway.

 

[lachy21]

My buddy and I unplugged the neg. terminal for a couple of minutes to reset the CPU, but that didn't work. How long should I leave the terminla unplug before the CPU resets itself? Where can I can a boost leak tester? How do I test it?

 

[Boost92awd]

I would leave the neagative terminal unconnected for like 10 minutes. As for the boost leak tester check out www.vfaq.com. You can make one for under $10.

 

[lachy21]

Hey guys, I finally did the pressure test and I had a small leak from BOV line to the throttle body. I fixed it , but I still have the same problem. Im still running rich and it bogs after 10psi. Is there anything else Im overlooking? the car starts fine and drive fine under normal driving conditions, but once I punch it its rich as hell and doesnt advance like it used to. Could it be the turbo itself? Please advise.

 

[No_Skillz]

Check plugs and wires.

 

[shaggyslaser]

Pull the plugs and check the condition of the plugs. That will tell you a little more information of whats really happening.

 

[lachy21]

Hey guys, I removed the old plugs and they were black. proof that I was running rich. I replaced them with new ones and it still running rich. Im assuming that either the turbo is blown because the spooling sound hasn't been the same since this problem started or that the maf isn't allowing air to flow through. Please help

 

[habitatguy187]

Pay attention people, he changed the o2 housing, therefore took out the o2 sensor. Make sure you've got it screwed down and hooked up right, you might have broken it when you took it out also.

 

[lachy21]

I replaced the 02 sensor when I removed the old one. You think the new one could have been bad from the start? Should I just replace it again to rule that out? Or is there something I can do to make sure the one I have is working properly? Im just running out of options

 

[habitatguy187]

Put the old one back in and see what happens, it'll only take a few mins anyway.

 

[lachy21]

Ok, I'll swap them out tonight and let you know how it goes. Thanks for the tip!

 

[habitatguy187]

Did you ever do a boost leak test? A boost leak can also cause you to run rich.

 

[robbo185]

Did you ever do a boost leak test? A boost leak can also cause you to run rich.

he did

 

[lachy21]

Yes, I did a boost leak test and everything was good. no leaks...