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Old 03-08-2015, 09:51 PM   #1716
alpax
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Join Date: Apr 2013
Drives: 2013 Subaru BRZ AT JRSC
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Quote:
Originally Posted by CSG Mike View Post
Do you have any vaccuum leaks?
Quote:
Originally Posted by enivid View Post
I battled similar issues. Fuel trims were terrible. Car almost died a few times, sluggish behavior, etc. I spent 6 months trying to figure it out. Finally found it was the God damn maf oring. It just became stretched out and leaked.
Thanks for the info guys.
So, most likely it's a leak somewhere?
I checked the intake part - used the same approach from the DSM days: pumped some compressed air into the system from SC to the throttle body inlet. It seems to be air-tight - I found no leaks, including the MAF. Just to make sure, I replaced the O-ring with the one, which came with the kit. The replacement ring looks a bit stronger, and with this new one it was easier to insert the MAF sensor into the tube - previously I had to jiggle and push it from side to side, I guess the old ring was actually slightly stretched. Now it went in just with a straight push, and felt like a tight fit. Will see if it solves the problem.

In case if I'll need further investigation, how should I check for the vacuum leaks?
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