Occasional 22 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-11-2005, 07:17 PM   #1
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Default Occasional 22

Have been getting a very occasional 22 (low TPS) but never long engough to stop, open the hood, and instrument. Have had a scan tool on and voltage recorded by ECM dropped to zero momentarily but could not duplicate while wiggling wires.

Was wondering if anyone knows of a stress point in the wiring that can short things. Last time this happened (on a Fiero) I wound up running a new wire from the ECM to the TPS but that is sloppy.
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Old 03-12-2005, 01:48 PM   #2
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May sound totally off here but could there be a dead spot in the TPS sensor?

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Old 03-12-2005, 02:25 PM   #3
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That'* my bet. I had that hit me with my 94 Suburban. A real PITA to track down. An analog ohmmeter is the best to use to diagnose that.
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Old 03-12-2005, 03:02 PM   #4
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Quote:
Originally Posted by willwren
That'* my bet. I had that hit me with my 94 Suburban. A real PITA to track down. An analog ohmmeter is the best to use to diagnose that.
I could actually throw my accelerator to the floor in the 95 and nothing would happen, well except for stumbling at 46mph... Just wouldn't shift back, but the TCC would unlock under 46 mph... I later checked it with a Digital Ohm meter... I used the 12V scale I think... and I watched it got to about 3 something( higher part ) untill 4v then poof 0v... Not sure what the exact voltage was anymore... Those numbers were just thrown in there... After I replaced the TPS there were no more drop out and my WOT or kickdown signal returned... Never had another issue... Been about 6 years now..

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