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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 03-16-2009, 01:42 PM   #11
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The codes came up p1406 Egr Valve and P0121 Throttle Position Sensor.
I'll Try cleaning the IAT if I can get it off.
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Old 03-16-2009, 02:36 PM   #12
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I would hold off on that.

Remember what I said about 5 minutes of Googggggggggglin?

Pay particular attention to the section that says diagnostic aids. Bet your eyes open a little wider when you see the EGR mentioned.

GearChatter.com :: View topic - DTC P0121 TP Sensor Circuit Insufficient Activity

Off to look up the EGR code and find the connection.

Edit: nothing on gearchatter about P1406, once I hit an FSM or anyone else that can, look up P1406 and find where it says something about TP sensor. That'* the area we want to head for with this one.

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Old 03-16-2009, 05:10 PM   #13
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Well I finally got the Intake Control Valve off and It'* very stiff. I cleaned it up a little and I'll see how this works out. The car did run better after the cleaning, but I haven't taken it out on the road.
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Old 03-16-2009, 06:51 PM   #14
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My check engine light is out and the car is running better now. Cleaning out the IACV took care of the problem.

Thank You
Kevin
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Old 03-18-2009, 09:24 PM   #15
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Quote:
Originally Posted by BillBoost37 View Post
I would hold off on that.

Remember what I said about 5 minutes of Googggggggggglin?

Pay particular attention to the section that says diagnostic aids. Bet your eyes open a little wider when you see the EGR mentioned.
I did Google the IACV before I even got the codes, I was hoping that my problem would be solved by cleaning the carbon build up on the part. Electrical Contact Cleaner was used to clean up the part and the Trottle Body.

How Does an Idle Air Control Valve Work? IAC
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