My 1993 Bonneville SSEI acting up, please help! - Page 2 - 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 10-25-2009, 10:59 PM   #11
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That'* something we really try to work on. I've been on forums like that as well.
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Old 10-26-2009, 08:23 AM   #12
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You mention pulling the TB to do the sensor. Most of the time, gaskets aren't readily available for your year. Did you use a new gasket to reattach the TB. If not, there may be a vacuum leak in that area.

Also, the TPS in your year is adjustable. A scan tool or mulitmeter should be used to adjust it for 0-5V when closed and open.
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Old 10-26-2009, 09:03 AM   #13
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I didn't use a new gasket, I figured the old one seemed good and would be ok. Today I'll do the tests on the coils, and see if they're good, then do the tps, then if those are both fine i'll get a new gasket for the throttle body. thanks for the tips and advice
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Old 10-26-2009, 09:04 AM   #14
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Spray throttle body cleaner around the TB gasket when the engine is running. If the RPM changes you have a vacuum leak. If no change then the gasket is fine.
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Old 10-26-2009, 12:26 PM   #15
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Quote:
Originally Posted by BillBoost37 View Post
You mention pulling the TB to do the sensor. Most of the time, gaskets aren't readily available for your year. Did you use a new gasket to reattach the TB. If not, there may be a vacuum leak in that area.

Also, the TPS in your year is adjustable. A scan tool or mulitmeter should be used to adjust it for 0-5V when closed and open.

So I might have to manually adjust the TPS sensor? Is there a thread that shows how to do that? I got the one that shows you how to check it, so I'll do that today. I thought the TPS adjusts itself automatically, guess I'm still learning on this car.
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Old 10-26-2009, 12:29 PM   #16
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There is not a thread on how to adjust it. But you will simply need to connect your DVOM and watch the voltage. You want 0 volts with the TPS all the way down, and 5 volts all the way up. Do this with the key in run, and the engine not started.
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Old 10-26-2009, 12:32 PM   #17
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There is not a thread on how to adjust it. But you will simply need to connect your DVOM and watch the voltage. You want 0 volts with the TPS all the way down, and 5 volts all the way up. Do this with the key in run, and the engine not started.
So I'm just testing the voltage? Does it set itself where it needs to be? I guess I'm confused, lol And when I'm checking it, you basically mean opening the throttle all the way up and back down and monitoring what it does? I know when I was changing it and looking in the book, it made it sound like you have to take it to a dealer after you replace them to have it set it. I just assumed you take the old one out put the new on in and voila, you're done.
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Old 10-26-2009, 12:36 PM   #18
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A TPS is a potentiometer, so as it moves it changes the voltage going threw it. It says take it to a dealer because it'* not just a plug and play. They would do the same thing as we are suggesting, setting the voltage. Sorry I can't tell you what wire to check, I don't have a FSM for your year.
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Old 10-26-2009, 12:45 PM   #19
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In this year we are discussing the holes on the TPS are egged and there should be some adjustment. Look for 0 at closed throttle and that the throttle shows movement as soon as you being opening it.

I'm theorizing that your TB has a vacuum leak and or the sensor may be providing some false readings based on being slightly out of adjustment.

Afterall if the sensor reads 0 and the throttle is 2-3% open, this would be essentially a huge vacuum leak from the view of the computer running the car.
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Old 10-26-2009, 01:44 PM   #20
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Originally Posted by BillBoost37 View Post
In this year we are discussing the holes on the TPS are egged and there should be some adjustment. Look for 0 at closed throttle and that the throttle shows movement as soon as you being opening it.

I'm theorizing that your TB has a vacuum leak and or the sensor may be providing some false readings based on being slightly out of adjustment.

Afterall if the sensor reads 0 and the throttle is 2-3% open, this would be essentially a huge vacuum leak from the view of the computer running the car.
Well I checked the gasket and no leak, tried to check the TPS, but was confused by it. At first it showed a reading and moved up as I open the throttle, but then tried again and it didn't move. I checked the coil packs, and 2 of them didn't show a reading, the only one that did was the middle one and it had a reading of about 5.76
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