04-20-2013, 09:05 PM
Join Date: Apr 2012
Total Cats: 0
NA Post Turbo install vacuum leak
I THINK I might still be suffering from an air leak or something causing my car to run lean idling.
The car is a 92 NA 1.6L, pieced together turbo with intercooler, AEM UEGO air fuel meter, RX7 460CC injectors, Megasquirt PnP.
I had a vacuum leak I found which was a nipple under the throttle body hidden behind a bracket which I think goes straight to the intake manifold.
I seems like all intake manifold side leaks are plugged, I can't hear or see any, yet my AFR at idle is still high with injector specific required fuel settings (18-20:1).
So now I am turning my attention to the valve cover breather, I have the PCV on one side and slapped a basic small air filter on the exhaust side breather, will this be the source of an air leak? My turbo kit doesn't have anywhere I can route the valve cover breather back into via a tube :(.
I'm just trying to found the source of my high AFR, my idle is some what smooth, I hover right around 900-950rpm which I think is an acceptable fluctuation, I haven't driven the car in a while so I don't remember.
BTW I haven't put the car on the street yet, I was trying to straighten out this idle issue and make sure I am 100% fluid leaks free.
Thanks for reading, and any help.