Hi,

My BOV isn't recirculated. Every once in a while i get a check engine light that flashes for a second and goes off. I hooked it up to my scan tool and the code was that it was running rich. It seems to only do this when im running in high rpm, or shifting a lot so it makes me thing the BOV is making it run rich. I dont really want to recirc it, but will if it can cause any problems. Will the car running rich cause anything bad to happen in the future?

thanks

 

Thats exactly whats happening. Since your MAF is a blow through, when you shift and the BOV opens, its releases the air that you maf has already accounted for. So when you shift and it releases the air, the fuel is already put into the chamber whether or not the air is there, causing a rich condition. Nothing bad will happen, only that you waste gas. Mine wont be recirc'd either.

 

You're correct except the MAF is draw-thru, not blow-thru

It won't cause any damage, just get worse fuel economy.

 

I wont be recircing my BOV. I figure the extra fuel on shifts may help cool the engine. Also..it may encourage flames to shoot out of my full 3" unrestricted exhaust

 

^ We need videos of said full 3" exhaust

 

I'll be sure to get some once I get it all together. 3" all the way from the turbo through a Borla XR-1 Race muffler(straight through) and then divided to twin 3" magnaflow tips. No cat, no resonator.... the biggest restriction will be the o2 sensor tips

 

isnt the turboxs exhaust also a full 3" system?

think alot of people are running vent to air, does it realy effect gas much ? happens when ur shifting so your not really on the gas in the first place

 

A crappy tune will affect your MPG way more the running VTA.

I still think VTA is silly for MAF cars - but to each their own.

 

Oh my bad, thanks for the correction!

 

Yes and yes.

 

I would think VTA is more to eliminate the possible occurrence of compressor surge.
Also people like to tell the world that they have boost with the BOV noise.

 

Hey jeef, you ran VTA forever with a MAF setup!

I still want to recirc, just haven't gotten around to it

 

The opposite, actually. Recirc removes the differential pressure across the compressor at low loads.

Yes. And it was less than optimal.

 

Did you go over to the dark side Jeff and get a Synapse?

 

No. The HKS is a better BOV, so I just put a recirc fitting on it.

 

Not a fan of the HKS - well that is not true; the HKS is a nice good piston BOV; but the Synapse is better to me - I am a convert (have 'em on Faille's FD, my RX8 and MS6 and bought another 2-3 from Ray for my buddies).

 

Yeah, I've tried both.
The Synapse simply opens too easily, doesn't sound cool, is butt ugly and has edges that remove chunks of skin from my hands every time I even look at it wrong.

The HKS is better sounding, better looking and ONLY opens if it sees the right ratio of charge tube pressure and manifold vacuum. Its not progressively creeping open like all of the other valves.

 

Thanks for the replies. Some other problems I may be having, (not sure if its a problem or not), but at around 4-5000 rpm's there is a slight hesitation/loss in the push against the seat feeling, but the boost gauge stays solid at about 6 psi. Also when I let the car come to idle it almost stalls, sometimes the battery light even comes on, however, it hasn't stalled on me yet. Is this normal or not?

thanks

 

wait.

what engine management are you running?

 

Emanage Ultimate all the way!!!!

 

^AP is tons better!!!

 

no wai! I tune with an abacus and a paperclip!

 

Would running rich cause a random/multiple misfire code? Foul plugs?

 

^^^ Yup.

 

^yup plus 1!!!