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 Post subject: Code 57
PostPosted: Mon Sep 10, 2018 9:04 pm 
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Year and Trim: 1993 ssei
Hey guys,, I have a 93 Bonnie ssei, I have a engine code 57 for boost control. This car was kind of a basket case. I have thrown a bunch of money at this car and this is my last issue. If I roll on the throttle slowly the car seems okay. But if I really Goose it the engine light comes on and flashes code 57, the car stumbles and it just doesn't feel like it's all there? I have replaced the BSC solenoid and made sure all the linkage and BSA valve is all working correctly. How does the ECM even know I have a boost control problem ?


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 Post subject: Re: Code 57
PostPosted: Mon Sep 10, 2018 9:56 pm 
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Can you get a live data scanner on it? Since you already replaced the solenoid, the next thing would be to see if there is a bunch of knock that makes the engine want to dump boost. If you roll in slow, how high does the boost gauge go?

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WHITE WHINE - IT'S INTOXICATING. 1992 SSE Supercharged 236.26 ci (.040 Over)
15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Subs, 1300 watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 8:47 am 
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Its hit and miss. Somtimes its almost full boost, other times its surging and the boost is fluttering. Im wonering if the bost valve triger wire is half broken somwhere? It will click when grounded at ecm.. i was wondering about the ecm logic and when it comands a boost dump? You mentioned knock sensor? I thought i was based on tps and tranny shifts?


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 9:00 am 
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If the bcs just helps keep the bypass closed then if the ecm if comanding actuation under full throtle would the bypass valve open without any vacume on the vac pot?


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 9:18 am 
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It seems to be temp related as well? If i drive the heck out of it falls flat almost everytime. If just crusong it goes like hell 50% of the time? No other codes. Its frustrating cuz it right there it surged like she wants to go sooo bad! Lol


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 10:30 am 
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You may have weak fuel pressure, either through a failing fuel pressure regulator or fuel pump, or fuel filter. Most of what you're describing, happened to me. Replacing the FPR helped, but replacing the pump did the full trick.

The BCS, when triggered by the PCM, will allow boost-side pressure to the bottom of the boost control actuator (BCA), which makes it open the valve and dump boost. You can take the bottom vacuum line off the BCA and see how it acts then. If it still won't do full boost, there's a vacuum problem with either the BCA or somewhere else nearby in the vacuum lines/fittings. The PCM will trigger it if there's spark knock, during heavier shifts, in reverse, and maybe while revving the engine in neutral.

Something to note: The PCM doesn't see the boost levels. The MAP is only for the dash gauge. You can unplug the MAP sensor and everything but the boost gauge will act the same as before.

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WHITE WHINE - IT'S INTOXICATING. 1992 SSE Supercharged 236.26 ci (.040 Over)
15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Subs, 1300 watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 10:43 am 
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I have unpluged all vacume lines to the bcv and the bcs still boost flutters??? If i jam the bost valve down to prevent bypass valve flutter i should get full boost at what rpm?


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 10:51 am 
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Leave the top line on the BCA. Just so it can act like it should.

In general, being a positive displacement pump in a fixed ratio to engine speed, you'd have full boost all the time if the BCA is always closed. Though it does get a bit more efficient as it spins faster, so it'll climb a little as engine speed increases.

The fluttering is what mine did when the fuel pump was at its weakest. And it got worse with heat.

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WHITE WHINE - IT'S INTOXICATING. 1992 SSE Supercharged 236.26 ci (.040 Over)
15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Subs, 1300 watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 10:52 am 
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Year and Trim: 1993 ssei
I keep getting conflicting specs on fuel press? What should it be? Im gonna drive with the guage under the wipper for a day or two


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 10:57 am 
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And if i dont have full boost? Ill replace the map/boost sensor. Then if if i still dont have full boost?? Chargers ever get weak? I just cant see that somtimes it will do full boost. So the charger has the cability....


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 12:22 pm 
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Year and Trim: 1992 SSE
2009 G8 GT
Fuel pressure specs are in here:

performance/topic1660.html

The SC won't get weak. It'll either function like it should (BCA/BCS function aside), or it'll fall apart (rarely). If bearings go bad, it may make bad noises. But it'll keep spinning until it fails to be able to spin. And that occurance will be very obvious.

Me, I'd be looking at fuel delivery and vacuum issues. Make sure the line to the bottom of the MAP is connected and not cracked. Check all the other lines for leakage. Maybe think about getting a professional cleaning done on the injectors. I'm not talking a fuel system cleaner. I'm talking removing the injectors and sending them to someone that has a sonic injector cleaner.

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WHITE WHINE - IT'S INTOXICATING. 1992 SSE Supercharged 236.26 ci (.040 Over)
15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Subs, 1300 watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 12:48 pm 
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Ok now ive got the old snapon brick on it. It has a knock count of 10 in a 6 min drive. Ill keep you updated. It uses fuel like a pig! The o2 is switching amd she goes into closed loop. Im gonna really look at fuel like you said. Still flashes boost problem 57.


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 1:32 pm 
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10 isn't a huge number, but probably higher than average. Did you try with all the vacuum lines in place except the one that goes between the BCA and the bottom of the BCA?

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WHITE WHINE - IT'S INTOXICATING. 1992 SSE Supercharged 236.26 ci (.040 Over)
15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Subs, 1300 watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 2:10 pm 
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Year and Trim: 1992 SSE
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Where did you get a new BCS?

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WHITE WHINE - IT'S INTOXICATING. 1992 SSE Supercharged 236.26 ci (.040 Over)
15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Subs, 1300 watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 2:30 pm 
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Year and Trim: 1993 ssei
Brand new. The mount bracket was backwards but it fits and seems ok


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 2:31 pm 
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I diconected the hose from bcs to bas and drove boost seems to flutuate less but i really have to open it up to get 60kpa of boost


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 2:43 pm 
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Could the prom be from a non boosted 3.8?? That would fire the bcs when i expects the 3rd egr valve on a non boosted 3.8...


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 2:44 pm 
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The ecm is new, correct and for a vin1 engine but prom came with car


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 3:06 pm 
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I'm not sure what would happen if an L27 prom were in the PCM.

Can you get a video of the boost gauge during driving?

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WHITE WHINE - IT'S INTOXICATING. 1992 SSE Supercharged 236.26 ci (.040 Over)
15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Subs, 1300 watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser


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 Post subject: Re: Code 57
PostPosted: Tue Sep 11, 2018 3:15 pm 
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Ill do that tonight


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