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Old 09-04-2004, 02:20 PM   #1
jake15
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1990 legacy dohc 2.2
6speed w/ brembos bishes!

Default i need help!! **FIXED**

first off a little about my car, 90 legacy w/ ej22t conversion and awd conversion, with a td05-16g and wrx intercooler with stock wrx bypass valve. and i've had a little trouble getting it to work right, thanks to a fellow legacycentral guy (vrg3) i got my car's check engine light to go off (wrong maf) but now it runs really rich and the bov is always venting air out at idle. now the consensus at the shop is that since the bov is always venting then lots of air must be coming in, and the maf may be dumping in more fuel thinking the engine is at a higher speed because of all the air coming in. but we dont know, so any help is very appreciated. thanks,

jake
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Last edited by jake15; 10-27-2004 at 02:12 AM.
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Old 09-07-2004, 08:49 AM   #2
sixpack subaru
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G'Day,
If the BOV is venting at idle it is either stuck/faulty or hooked up incorrectly, from what you have said it is std ECU? How did you do that? Dumping more fuel in will NOT open BOV at idle.
Make sure all your Vac/Boost lines are hooked up correctly, if it is running REALLY rich with no EWL on, check your vac readings at idle, if your BOV is open at idle, it will be sucking air, resulting in a lean idle, which the ECU will add extra fuel to compensate the lean mix, resulting in an increase of idle speed. Not a whole lot of info to go on.....

But I hope this helps somewhat....

Cheers
Sixpack Subaru
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Old 09-08-2004, 04:00 PM   #3
subiekid
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EJ22T/TEC3 & '12 Civic

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well if the bov is not hooked up to the intake return (just venting to atmosphere) then that might be your problem. MY intake return busted and my bov was venting to atmospher, it was hard to hold boost, and ran much different. THe stock bov is not designed to vent to atmospher. get an aftermarket bov or fab up a return pipe.
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Old 09-08-2004, 11:32 PM   #4
gpatmac
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psm

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Quote:
Originally Posted by jake15
first off a little about my car, 90 legacy w/ ej22t conversion and awd conversion, with a td05-16g and wrx intercooler with stock wrx bypass valve. and i've had a little trouble getting it to work right, thanks to a fellow legacycentral guy (vrg3) i got my car's check engine light to go off (wrong maf) but now it runs really rich and the bov is always venting air out at idle. now the consensus at the shop is that since the bov is always venting then lots of air must be coming in, and the maf may be dumping in more fuel thinking the engine is at a higher speed because of all the air coming in. but we dont know, so any help is very appreciated. thanks,

jake
I'd be very interested in seeing pics of your car and engine bay. Sounds sweet.

The only thing I could think of to add would be to check where your IC hoses into your throttle body. I'm no sixpack, not even a 40, but my car had a richness problem until I found that area leaking.
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Old 09-25-2004, 11:30 AM   #5
sixpack subaru
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1995 WRX,APEXi,HKS,$
Faded, Stonechipped Red

Subaru Stars

Quote:
Originally Posted by jake15
first off a little about my car, 90 legacy w/ ej22t conversion and awd conversion, with a td05-16g and wrx intercooler with stock wrx bypass valve. and i've had a little trouble getting it to work right, thanks to a fellow legacycentral guy (vrg3) i got my car's check engine light to go off (wrong maf) but now it runs really rich and the bov is always venting air out at idle. now the consensus at the shop is that since the bov is always venting then lots of air must be coming in, and the maf may be dumping in more fuel thinking the engine is at a higher speed because of all the air coming in. but we dont know, so any help is very appreciated. thanks,

jake
Yeah, send in some pics, (and then tell me how to ).
If it is stock BOV you need to return the 'vented' air to anywhere 'up-stream' of the AFM/AMM. This should solve ALL your problems.

Cheers,

Sixpack Subaru
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Old 09-25-2004, 12:23 PM   #6
wrx_driver_2002
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I'll post the pics for him, seeing as how he (jake15) is my little brother . Subiekid, You've already seen them. But here they are again.

Intercooler Mounted


Pic of the stock Bypass valve


Shot of 90 degree Radiator hose for turbo outlet


Stock WRX Y-Pipe that has been cut so I could put the metal pipe in to lengthen the inlet tube.


Stock USDM WRX Turbo on Left Stock Turbo Legacy VF11 on Right


Stock VF11 From 1991 Turbo Legacy


Shot of 90 degree Radiator hose for turbo outlet
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Old 09-25-2004, 12:24 PM   #7
wrx_driver_2002
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Default more pics taken today

Overall Shot of Engine Bay


Another Engine Bay Shot


WRX Coolant Tank (To get rid of Plastic POS)


Top End Tank Clearance


Bottom Fitting Clearance Right Side


Bottom Fitting Clearance Left Side
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Old 09-25-2004, 12:47 PM   #8
sixpack subaru
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Great pics, but don't help with the diagnostic on your fault!! LOL

Cheers,

Sixpack Subaru
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Old 09-25-2004, 12:58 PM   #9
wrx_driver_2002
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We just need to get rid of the factory Bypass valve and replace it with the aftermarket TXS Blow Off Valve that we got the other day. Then it should work properly. We don't have the room (as you can see from one of the pics) to hook up the recirc properly...We'd need a bypass valve with the outlet on the opposite side (so that it wouldn't be in the way of the throttle assembly. See pic below) None of us had any idea that the stock valve wouldn't work properly without the recirc hooked up. Now we know...lol

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Old 09-25-2004, 05:25 PM   #10
subiekid
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EJ22T/TEC3 & '12 Civic

Default

Quote:
Originally Posted by sixpack subaru
Great pics, but don't help with the diagnostic on your fault!! LOL

Cheers,

Sixpack Subaru
hey, is it easy for you to find first generation air to air intercoolers?
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Old 09-25-2004, 05:37 PM   #11
wrx_driver_2002
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I've got one coming from england. From a 1996 WRX. You're looking for the slanted one, right?
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Old 09-25-2004, 05:41 PM   #12
subiekid
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Default

Quote:
Originally Posted by wrx_driver_2002
I've got one coming from england. From a 1996 WRX. You're looking for the slanted one, right?

Yea, that is the one. I am not sure if I want to use one or not. I have the WRX ic, and all the junk needed to put it on. And I have been looking at a FMIC for when I upgrade my turbo. I know the stock wrx ic and the smaller slanted one would get too hot.

I also considered going air to water, but there is a lot of stuff to add for it. I just cant decide.
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Old 09-29-2004, 04:34 AM   #13
sixpack subaru
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Default

Heyah!!
Don't be too sure about the 'little slanty' getting too hot, I've had one on my WRX for two years at 20psi with no trouble, and I don't know if you guys think 43degCelsius is hot, but it's pretty warm down here. Never had an an issue with pinging or knocking or soiking EGT's--nothing, the only thing I dont like about it is that it's stock!!! IMPO I would go all out and flip the Inlet around! Relocate your altenator to the LH Side after moving battery etc, then go with full FMIC!!! Dollars allowing of course! I have had a 99 WRX cooler on the top of my 'Beer Fridge' in the Shed for over two years, even got a 99 Inlet Manifold complete aswell, I DEFINITELY would have already fitted them if I thought/new it was needed. but I don't think it is.
Failing the FMIC thing, spend an hour or so looking at Water to air, you DONT HAVE TO use the Subaru Product, there are plenty of Marine heat exchangers that are just as efficient but half the size. Make sure you get a REAL GOOD pump is all....

Cheers

Sixpack Subaru
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Old 10-05-2004, 12:33 AM   #14
jake15
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1990 legacy dohc 2.2
6speed w/ brembos bishes!

Default

anyone have any thoughts that might benefit me? i'm still stumped as to whats going on? thanks
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Old 10-05-2004, 02:26 AM   #15
subiekid
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EJ22T/TEC3 & '12 Civic

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Quote:
Originally Posted by jake15
anyone have any thoughts that might benefit me? i'm still stumped as to whats going on? thanks
Did you install the new bov?
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Old 10-05-2004, 11:16 AM   #16
sixpack subaru
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1995 WRX,APEXi,HKS,$
Faded, Stonechipped Red

Subaru Stars

Quote:
Originally Posted by jake15
first off a little about my car, 90 legacy w/ ej22t conversion and awd conversion, with a td05-16g and wrx intercooler with stock wrx bypass valve. and i've had a little trouble getting it to work right, thanks to a fellow legacycentral guy (vrg3) i got my car's check engine light to go off (wrong maf) but now it runs really rich and the bov is always venting air out at idle. now the consensus at the shop is that since the bov is always venting then lots of air must be coming in, and the maf may be dumping in more fuel thinking the engine is at a higher speed because of all the air coming in. but we dont know, so any help is very appreciated. thanks,

jake
Hey, both of you??
that Radiator hose will last 12 months max . Watch the wear on the PWR STR line that is cable tied tot he Header Tank-I'll give that 12months too!!

Did you sort your Hassles out or are you just ignoring everyone now

Cheers bud(s?)

Sixpack Subaru
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Old 10-05-2004, 01:14 PM   #17
wrx_driver_2002
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Jake hasn't been able to get down to the shop lately to work on his car. Yes, we got the BOV mounted. We'll see how long the radiator hose lasts. If it comes down to it, We can always have a silicone hose made. As for the Coolant tank...I haven't given it much thought as to what to do about it. I might end up machining a bracket for it.

Mike
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Old 10-06-2004, 04:19 AM   #18
reddevil
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I support the recirculating BOV valve diagnosis. The stock BOV is more of a ABV. ie an Air Bypass Valve. When at vacumn, ie not on boost, the valve is open and allows air to go "forwards" by bypassing the turbo/supercharger into the throttle body. When at boost, the BOV closes up, allowing boost to be built, then when you let off the gas, the vacumn takes back over, the valve opens up again and the excess pressure (boost) bleeds back off to before the supercharger/turbocharger, basically equalizing the pressure of the system.

I had the same problem when I installed a BOV from a Supra onto my Supercharger setup and the car wouldnt idle worth a darn. Then I realized what exactly the ABV on the supra part really meant. I ducted it back into the intake and havent had a problem since. I would love a real "pshhhhh" BOV but dont really need one becuase of the relatively low boost I am running.

Last edited by reddevil; 10-06-2004 at 04:25 AM.
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Old 10-09-2004, 12:24 PM   #19
jake15
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1990 legacy dohc 2.2
6speed w/ brembos bishes!

Default

the radiator hose is just a temporary fix, hopefully within 12 months i will be switched to a fmic the whole zip tied coolant resevoir is again a temporary fix until i can get the resources to create a metal bracket

like wrx_driver_2002 said i have school and haven't been able to get a ride to the shop. thanks,


jake
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Old 10-27-2004, 01:21 AM   #20
jake15
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Default

**UPDATE**

found the problem, it was a combonation of spark plugs that were coverd in black gunk from running rich, a cam sensor wire that wasnt spliced to well , and a connector that wasnt quite plugged in all the way. pics and a video here
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