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Old 06-20-2012, 06:37 PM   #69
C J
Scooby Specialist
 
Member#: 132587
Join Date: Nov 2006
Location: Lincoln, NE
Vehicle:
2006 JrTuned STi
Stock engine 9.77@147mph

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Quote:
Originally Posted by juanmedina View Post
I think you should install the walbro 255lph back and mod it. See if it helps.... just so you don't have to buy another pump and find out that the issue is something else.

Also have you check the o-ring on the MAF sensor? that o-ring tears up really easily.

GL
You think I should ditch the bigger pump and put the 255 back in? When you say mod it what do you mean?

Checked the MAF o ring quite a few times and it appears to be ok.

Quote:
Originally Posted by Phatron View Post
Yes sir.

But I agree with what everyone else has already said. Maf is too close to turbo. Anytime u are transitioning throttle the maf in that position is gonna be off.

Blow thru speed density or just straight speed density are solutions but if it's the front 02 u will still have issues unless u disable closed loop.
What are some symptoms of the front o2 failing?

Maybe someday I would like to switch over and go SD but right now I would like to just get it running on the MAF. Hopefully once we move the MAF down into the fender it will fix any MAF problems.
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