Do I still need my Boost Solenoid?

That spinning thing that makes all of the cool noises. OE and Aftermarket.

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kimokalihi
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Do I still need my Boost Solenoid?

Post by kimokalihi »

I have a manual boost controller and my boost solenoid is all capped off. Can I remove it all together without causing any problems?

Image
Image





Also, For the other two sensors that I'm still using, do they need to be oriented the way they were from the factory? I just moved them behind the brake proportioning valve or whatever that thing is and they're crooked now. One is sideways and the other is upside down.

Image
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wtdash
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Re: Do I still need my Boost Solenoid?

Post by wtdash »

You'll get a CEL w/out it plugged in - stock and EJ20G ECU. If you get a 'dropping resistor' (DR) from an AT-equipped car (turbo and NA) it will prevent the CEL- it has the same plug/connector. They are mounted on the backside of that bracket that holds the turbo sensors.

EDIT: Check the plug on the BCS. The DR were round on the '90-91 Automatics; square on the '92+. Per Josh's link below.

I don't know whether the other sensors need to be kept upright.

Td
Last edited by wtdash on Thu May 03, 2012 8:25 pm, edited 2 times in total.
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kimokalihi
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Re: Do I still need my Boost Solenoid?

Post by kimokalihi »

So far no problems with the way they're mounted. What is a dropping resister? I'll go look for one in the junkyard. But I didn't think NA cars had that bracket?
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wtdash
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Re: Do I still need my Boost Solenoid?

Post by wtdash »

Kimo,
Sir Josh created THIS.

And a pic from an NA for reference. On a different bracket:
Image

Td
Turbo Subies:
'87 GL-10 Turbo - SOLD
'90 BJ EJ22T/DOHC & 5speed swap - SOLD
'04 FXT, Forged internals, VF39, STI TMIC, Cobb AP- SOLD
'93 Legacy SS - 5-speed, SOLD :-(
'02 WRX -SOLD
'96 BD-turbo'd-SOLD
'98 SF - NA-T
kimokalihi
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Re: Do I still need my Boost Solenoid?

Post by kimokalihi »

I see, cool. Not as cool as removing it completely and not replacing it but that might be smaller and easier to tuck away where the other sensors got moved to.
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91 SS EJ20G Engine/Tranny/Diff Swap Build Thread Here
"Your testes are close to your bottom but you still play with them all the time." Jeremy Clarkson
kimokalihi
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Re: Do I still need my Boost Solenoid?

Post by kimokalihi »

What is this green labeled box bolted to the frame rail?

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91 SS EJ20G Engine/Tranny/Diff Swap Build Thread Here
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wtdash
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Re: Do I still need my Boost Solenoid?

Post by wtdash »

Huh...IHNFI. :-)
Turbo Subies:
'87 GL-10 Turbo - SOLD
'90 BJ EJ22T/DOHC & 5speed swap - SOLD
'04 FXT, Forged internals, VF39, STI TMIC, Cobb AP- SOLD
'93 Legacy SS - 5-speed, SOLD :-(
'02 WRX -SOLD
'96 BD-turbo'd-SOLD
'98 SF - NA-T
kimokalihi
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Re: Do I still need my Boost Solenoid?

Post by kimokalihi »

It says "do not drop" on it I think.
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Legacy777
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Re: Do I still need my Boost Solenoid?

Post by Legacy777 »

It may be an airbag sensor or possibly a g sensor for the ABS system. I'm going to guess g sensor, usually the airbag sensors are closer to the front of the car.
Josh

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1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

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wtdash
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Re: Do I still need my Boost Solenoid?

Post by wtdash »

^If his is a '91 - no airbag, so ABS makes more sense.

Td
Turbo Subies:
'87 GL-10 Turbo - SOLD
'90 BJ EJ22T/DOHC & 5speed swap - SOLD
'04 FXT, Forged internals, VF39, STI TMIC, Cobb AP- SOLD
'93 Legacy SS - 5-speed, SOLD :-(
'02 WRX -SOLD
'96 BD-turbo'd-SOLD
'98 SF - NA-T
kimokalihi
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Re: Do I still need my Boost Solenoid?

Post by kimokalihi »

Yes, no airbags for me. Except in my WRX seats...
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91 SS EJ20G Engine/Tranny/Diff Swap Build Thread Here
"Your testes are close to your bottom but you still play with them all the time." Jeremy Clarkson
kimokalihi
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Re: Do I still need my Boost Solenoid?

Post by kimokalihi »

Picked up the na automatic resister for $3 at the junkyard.
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91 SS EJ20G Engine/Tranny/Diff Swap Build Thread Here
"Your testes are close to your bottom but you still play with them all the time." Jeremy Clarkson
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Re: Do I still need my Boost Solenoid?

Post by Legacy777 »

sweet
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

If you need to get a hold of me please email me rather then pm
SiCkSTi04
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Re: Do I still need my Boost Solenoid?

Post by SiCkSTi04 »

kimokalihi wrote:It says "do not drop" on it I think.
Got a part number on that thing? I'm wanting to know as well
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kimokalihi
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Re: Do I still need my Boost Solenoid?

Post by kimokalihi »

It's an ABS sensor. Probably to tell the computer which direction the car is going?

Part number 26740AA040.

SB117405 SENSOR AY [New Part# 26740AA040]

List Price:$222.37 (dealership)
Your Price:$160.10 (1stsubaruparts.com)

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91 SS EJ20G Engine/Tranny/Diff Swap Build Thread Here
"Your testes are close to your bottom but you still play with them all the time." Jeremy Clarkson
kimokalihi
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Re: Do I still need my Boost Solenoid?

Post by kimokalihi »

2nd google hit came up with this: http://www.surrealmirage.com/vrg3/partnumbers/

ABS G Sensor
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91 SS EJ20G Engine/Tranny/Diff Swap Build Thread Here
"Your testes are close to your bottom but you still play with them all the time." Jeremy Clarkson
i_c_the_light
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Re: Do I still need my Boost Solenoid?

Post by i_c_the_light »

I have been trying to figure out what that sensor is for the past 3 months!
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cj91legss
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Re: Do I still need my Boost Solenoid?

Post by cj91legss »

hmm, maybe it should go away if you don't have abs :P
91 L-TW Wagon with a full Swap -RIP
92 SS Prefaced, GD dash swapped, 22T/205 Hybrid 20 psi - BEAST!
93 SS Bone Stock Gone!
94 TW Bone Stock Gone!
91 SS 4EAT Sold!
98 LGT 4EAT
98 LGT Wagon 4EAT
kimokalihi
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Re: Do I still need my Boost Solenoid?

Post by kimokalihi »

It will when I get rid of abs. For now the ss sits collecting rust on its rotors looking real sad.
98 Metro Hatch Daily Driver :)
91 SS EJ20G Engine/Tranny/Diff Swap Build Thread Here
"Your testes are close to your bottom but you still play with them all the time." Jeremy Clarkson
cj91legss
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Re: Do I still need my Boost Solenoid?

Post by cj91legss »

that is sad, I wanna get rid of my ABS too...

What do you need to do to get your car running again, just have that piece welded back on?
91 L-TW Wagon with a full Swap -RIP
92 SS Prefaced, GD dash swapped, 22T/205 Hybrid 20 psi - BEAST!
93 SS Bone Stock Gone!
94 TW Bone Stock Gone!
91 SS 4EAT Sold!
98 LGT 4EAT
98 LGT Wagon 4EAT
kimokalihi
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Joined: Mon Nov 06, 2006 3:41 am
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Re: Do I still need my Boost Solenoid?

Post by kimokalihi »

Don't know. Haven't even looked at it. I just removed the battery to use in my metro and went from getting 23 mpg to 42 and I haven't had time to pull the tranny to find out what broke. My guess is new clutch fork and clutch.
98 Metro Hatch Daily Driver :)
91 SS EJ20G Engine/Tranny/Diff Swap Build Thread Here
"Your testes are close to your bottom but you still play with them all the time." Jeremy Clarkson
cj91legss
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Re: Do I still need my Boost Solenoid?

Post by cj91legss »

no bueno
91 L-TW Wagon with a full Swap -RIP
92 SS Prefaced, GD dash swapped, 22T/205 Hybrid 20 psi - BEAST!
93 SS Bone Stock Gone!
94 TW Bone Stock Gone!
91 SS 4EAT Sold!
98 LGT 4EAT
98 LGT Wagon 4EAT
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