No Cruise Control After Changing TPS - 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 05-05-2005, 02:22 PM   #11
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I think the TPS could be suspect as well. If it worked before you changed it, and now it doesnt, then that definetly puts a flag up. Do you have access to a multimeter?
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Old 05-05-2005, 02:28 PM   #12
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I'm sure 10 people are having this same thought....I just wrote it first.

What'* that spaghetti mess of wiring you got happening by the cruise control? Can you please tie them up and keep them from getting burned on the exhaust shield.
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Old 05-05-2005, 02:28 PM   #13
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Ok this is another one...

Bill, Bill and Bill... And Newbie...

I'm not sure about the 92-93 Bonnies...

But the 94-95 bonnies monitor almost everything the CC does... Its possible that the TPS( New ) may nees to be checked to make sure its not defective....

Would you by chance know of anyone near you that possibly has a scantool that will read a 94-95 with OBD1 using the OBD2 connector? If the tool will read 94-95 GM it should be able to read the 16 Pin 94-95 Bonnie... The failure can be anything from the Vacume line( broken or collapsed ), to the CC Module, to the stalk switch, to the brake switch...

Another question...

Does the car shift good and on time? Not early leaving you with a little clunk... And whilr crusing on the interstate if you were to floor it does you car go back to D or 2nd gear, If it does than the PCM has a kickdown signal, and the TPS is what gives the load signal to the PCM...

I have also in the past seen where a faulty PCM was also to blame for a non functioning Cruise Control...

So lets try and knock the problems out one by one...

Also if there is a Cruise malfunction code stored in the PCM it will not set off the SES light... Good Luck and let us know what you find..

Also was the replacement TPS a Wells unit?

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Old 05-05-2005, 02:39 PM   #14
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Let me try to take these one at a time.

Yes I have a multimeter, so point me where to measure.

The spaghetti mess is for an aftermarket autostarter that I installed last year. The pink is going to the battery, the purple to a hood switch and the yellow is unneeded for the Bonnie. I had them tucked under , but they got out a few months back when I changed the heater core. I will tie them back again.


The New TPS seems to be working correctly in that it solved the problem that lead me to change it (no response to accelerator and car just shutting off). Also, the shifting seems to be much smoother and at proper points. I do have a good passing gear when I floor it now.

Dunno if it is Wells or not. I got it at Autozone.

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Would you by chance know of anyone near you that possibly has a scantool that will read a 94-95 with OBD1 using the OBD2 connector? If the tool will read 94-95 GM it should be able to read the 16 Pin 94-95 Bonnie...
Sorry, this was over my head.

Thanks
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Old 05-05-2005, 03:31 PM   #15
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Xaa what he meant about people by you having a scantool...

Where are you located, please put it in your profile. That way other members near you can offer tools, time etc to help out if inclined.

The scantool hooks up to the connector in your d/* kickpanel under the dash. It links to the car computer to tell you what is happening, what malfunctions have occurred. Many members have scantools, others have friends with scan tools...and yet some others go to Advance or Autozone for a free scan.
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Old 05-05-2005, 03:50 PM   #16
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Got it. I'm in Charlotte, NC (added to my profile now).

Initially with the TPS I went to Autozone for a scan. Their scan tool (I called it a handheld computer), would connect to my car but not initialize. The guy said because it was pre-96, dunno if that'* true or not. Then he gave me a number of a guy with a more expensive unit (it was a Snap on). he came out and checked the codes to determine I needed to change the TPS. The only code there was "Throttle Position Low" so I changed the TPS.

That guy charged me $40 for a scan. If I'm reading this correctly now, prhaps I need another scan to uncover what might be going on with the cruise?

Anyway, you guys rock, I won't be a newbie forever.
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Old 05-05-2005, 04:31 PM   #17
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Sounds good... Looks good for location. Next put your 1994 SE into your signature that way you really never need to say what you have.
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Old 05-05-2005, 05:06 PM   #18
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Tell them before they scan that you have OBD I with OBD II connectors.
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Old 05-05-2005, 08:08 PM   #19
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Try this.

http://www.geocities.com/carnutguy/c...hancement.html

See what kind of voltage you get from the TPS.
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Old 05-05-2005, 09:49 PM   #20
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Hmmmm....check something first. Make sure you got the throttle shaft pin on the correct side of the TPS actuator arm. It'* possible to get it swapped. Just make sure the TPS actuator arm moves when you manually advance the throttle plate. The pin on the throttle plate shaft should ride on the FLAT side of the TPS actuator arm.
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