couple of problems - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-29-2005, 01:32 PM   #21
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Yes
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Old 09-29-2005, 02:52 PM   #22
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When I first tried after just starting up the car it gave me 7.5, but after driving around for a little bit and pushing the gas all the way down it gave me a little less than 2.5
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Old 09-29-2005, 03:05 PM   #23
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That would be the symptom to back up the code 56. Check your electrical connector and vacuum fittings on the BCS Boost control solonoid. It'* mounted on the front of the supercharger on the Boost control actuator bracket. 2 vacuum fittings, and an electrical connector. Quite small. Only an inch by half or so.
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Old 09-29-2005, 08:48 PM   #24
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I checked the vacum lines and the electronic connector, the lines are not cracked or anything like that and there didn't seem to be any shorts in the wires for the electronic connector. So everything there seems to be fine. What now?
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Old 09-30-2005, 10:44 AM   #25
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Since those are fine am I supposed to be looking into changing the boost solenoid?
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Old 09-30-2005, 11:32 AM   #26
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There is a bypass test you can do to confirm it'* the bypass soleniod. I'm not positive how to connect it..I'll let the others tell you. Then it'* off to a BCS
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Old 10-01-2005, 10:49 PM   #27
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can anyone tell me how to do the bypass test?
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Old 10-02-2005, 02:09 AM   #28
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Yes. "WOT" is "wide open throttle."
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Old 10-02-2005, 02:41 AM   #29
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Pull the vacuum line off the bottom of the wastegate actuator (black cylinder on front of SC). If boost returns to normal, the BCS is funky.
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Old 10-02-2005, 09:47 PM   #30
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removed vacum line and at WOT i'm running at 8-8.5 boost. I'm guessing that'* where it should be. So do I need a new BCS? If so where can I get one?
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