97 Bonnie SSEi Issue - 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 05-01-2008, 09:52 PM   #1
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Default 97 Bonnie SSEi Issue

Was driving with cruise on 70mph, stepped on gas to pass and motor acted like it was choking and it thru the (my little buddy light) check engine lite and the boost gauge stuck on 0. Had scanned, 4 codes, 2 repeated, MAF and TPS. Replaced both no engine lite on, but still a sticky boost gauge from time to time, any ideas, i still need to replace a dirty nasty IAC sensor. Please help my bonnie dont like being sick... THanks
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Old 05-01-2008, 10:44 PM   #2
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IAC isn't a sensor. It'* an actuator that controls how much air bypasses the throttle plate at idle and when cruising.

You need to remove the entire throttle body and clean it and the IAC as well. The procedure is in Techinfo, link at the top of the page.

For troubleshooting your boost, at idle do this:

Open the hood, and disconnect the top vacuum line on the BCA (boost control actuator). It'* the round black cylinder mounted on the front of the supercharger. When you disconnect the top vac line, the actuator should go full travel the other direction. Now go for a short drive this way. Do you get full boost?
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