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 FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)

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TonySmooth89
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PostSubject: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyThu Dec 27, 2007 10:58 pm

So i took my engine cover off the other day to change the plugs and wires...and today i opened my hood ( cover still off ) and i noticed my boost bypass valve has completely dissassembled,..further more i looked and it seems like someone used some sort of glue to seal up the vacuum line leading to it... any ideas why this might have been done? and how much are the valves? any help is appreciated.
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RhinoFLA
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PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptySat Jan 05, 2008 9:48 pm

Check it out man

Link
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TonySmooth89
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PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptySat Jan 05, 2008 9:50 pm

ok thats good to know because i definitely wanna replace that... thanks...
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RhinoFLA
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PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptySat Jan 05, 2008 9:52 pm

Cheaper than I thought it was
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mr.19982tone
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PostSubject: wut the? no supercharger boost   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptySun Feb 03, 2008 6:22 pm

superchrger is not working feels like a doggy non-supercherged 3800 all the vacumelines are hooked up everything is where it belongs! anybody know wut might be going on?
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Mr.Riviera
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PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptySun Feb 03, 2008 9:04 pm

are the rotors turning? maybe your BBV is stuck open

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
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FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) Dsc_0110
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albertj
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PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptySun Feb 03, 2008 10:13 pm

When did you first notice this?
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deekster_caddy
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PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptySun Feb 03, 2008 10:43 pm

could be that the coupler has crapped out. Was there any noise under the hood that suddenly went away?
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AA
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PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptySun Feb 03, 2008 10:52 pm

How many miles on the car? Did this happen all of a sudden?

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
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'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
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'95 Celica • 152k miles • 0-60: yes
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TonySmooth89
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PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyMon Feb 04, 2008 8:44 am

make sure all your wires are hooked up to your plugs. i had a wire come off of one of the plugs one time. Can you still hear the supercharger whine?
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mr.19982tone
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PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyMon Feb 04, 2008 9:49 am

yes the wine is still there everything is pluged in and one day it just had no power there is play in the supercharger wheel the motor and supercharger is supose to have 88,000 on them it worked good when i picked it up from the shop there is no skiping or anything its smooth just no power
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Buickman104
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PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyMon Feb 04, 2008 10:57 am

Then it may be the Boost control solenoid. When they go they tend to just dump boost. They leave you with like 2 or 3 pounds of boost and just dump everything else.
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mr.19982tone
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PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyMon Feb 04, 2008 6:46 pm

i will check that where is it located?
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deekster_caddy
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PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptySun Feb 10, 2008 9:20 pm

How'd you make out with this? Any new info?
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BillBoost37
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PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyMon Feb 11, 2008 7:07 am

The BCS/BCA are the black can and black electrical solenoid on the SC right next to the thermostat housing. (top radiator hose).

Deek.. with the alignment if you lost a coupler competely the pins would hit and still turn the charger. I doubt it would be good though.
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mr.19982tone
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FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) Empty
PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyThu Feb 14, 2008 5:31 pm

have not done anything with it its been shitty out so i have not been drivin it
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arttu80
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FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) Empty
PostSubject: NO BOOST in tha RIV!!!   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyThu May 15, 2008 3:07 pm

Today I hooked up boost gauge and so it was, no boost. Max 3psi at WOT!

I suspect control solenoid, but I would appreciate tips on troubleshooting.

In the picture below is control solenoid, and one port is open, WHY? May it be the culprit? Please help!

FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) Img1104348

The car is 1997 Riviera.

Btw, I already replaced supercharger coupler and nose bearings, and I hear supercharger whine at WOT, so its not stuck or anything. I also checked that boost valve is moving, when I start the car.


Last edited by arttu80 on Sat May 24, 2008 11:45 am; edited 1 time in total
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Mr.Riviera
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FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) Empty
PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyThu May 15, 2008 8:33 pm

that port should be open. and it is suposed to have a little filter on it but w/e.
still sounds like it could be the control valve or a vac line. does the arm on the BBV fully open/close?

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
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FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) Dsc_0110
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dreww
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FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) Empty
PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyThu May 15, 2008 11:54 pm

mine did that the other day.
dont know what it was. Just chalked it up to the PCM cutting boost off because of a fueling problem. Normal boost now.
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arttu80
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FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) Empty
PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyFri May 16, 2008 12:29 am

Well, I checked that BBV lever is going up when car is started and when it shut down, lever resting on intake plenum. So it is moving.

What's the good place to shop around for new boost control solenoid? I checked rockauto.com but they doesn't seem to have one...
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FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) Empty
PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyFri May 16, 2008 7:24 am

Find one from other members for $10-15. GM wants about $30-40 IIRC.
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dreww
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FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) Empty
PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyFri May 16, 2008 3:12 pm

mine is only getting about 7psi at WOT

is my BCS going out? Or do you really lose that much boost with a ported SC?
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arttu80
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FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) Empty
PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyFri May 16, 2008 5:28 pm

Well, 7psi would be normal. According to 1997 Riviera/Aurora shop manual it should be around 7-9psi, so its ok. Mine is only about 2-3psi at WOT, so its not charging. My PA Ultra is Series I SC engine, and it feels much more quicker than 97 Riv with Series II SC motor, because of low boost.


I tried to eliminate bypass solenoid and even disconnected vacuum line from bypass valve, but its still 2-3psi. I'm hearing some "hissing" sound maybe from under blower, I guess it may be faulty plenum to supercharger gasket or something? I dunno yet.
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Mr.Riviera
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FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) Empty
PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyFri May 16, 2008 5:40 pm

is the vac line under the blower snout connected?

_________________
1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
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FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) Dsc_0110
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dreww
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FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) Empty
PostSubject: Re: FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost)   FAQ: Boost Bypass Valve/Boost Control Solenoid Questions (No Boost) EmptyFri May 16, 2008 6:35 pm

arttu80 wrote:
Well, 7psi would be normal. According to 1997 Riviera/Aurora shop manual it should be around 7-9psi, so its ok. Mine is only about 2-3psi at WOT, so its not charging. My PA Ultra is Series I SC engine, and it feels much more quicker than 97 Riv with Series II SC motor, because of low boost.


I tried to eliminate bypass solenoid and even disconnected vacuum line from bypass valve, but its still 2-3psi. I'm hearing some "hissing" sound maybe from under blower, I guess it may be faulty plenum to supercharger gasket or something? I dunno yet.

well 7-9 is normal for a 3.8 pulley on a stock motor. I got a 3.25" Sorry, didn't mean to hijack your thread. What was the theory behind bypassing the BCS?

Mr.Riviera wrote:
is the vac line under the blower snout connected?

yes. All my vac lines now run from that one port since I got the newer type SC housing.
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