HOW TO ADJUS/CHECK TPS

Tiny
ARTHUR BARNES
  • MEMBER
  • GMC
1992 BUICK LeSABRE 165K MILES 3.8L AUTO TRANS NEED TO ADJUST THROTTLE POSITION SENSOR, ALSO CAN'T FIND MAP SENSOR HAVE CODES OF 22, 26, 34, AND41
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Saturday, March 18th, 2006 AT 1:05 PM

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Tiny
METRO MECH
  • MEMBER
Go to an auto supply store such as Auto Zone and purchase a Haynes Repair Manual for the 1992 Buick. It should have the location of the MAP sensor and a chart for all the other codes.
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Saturday, March 18th, 2006 AT 5:47 PM
Tiny
DEERAYROSE
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I'd suggest looking up your questions online before buying the Haynes Repair Manual. I have one for my 91 Olds Eighty Eight, and we would have the same book. It gives no useful information on the throttle position sensor, and limited information on the MAP sensor. Also, there are variations to the 3.8L engines, so much so that I can't refer to the book in some aspects. For example, it shows me exactly where the Knock sensor is. However, on my 3800 engine, it's nowhere in sight. Wierd. Still haven't found it, yet I can buy one for it! :)

Go to a.U.T.O z.O.N.E, set up your basic car information, and then go into REPAIR INFO area. Then go into PRODUCTS AND HOW TO INFO area. You can choose by letter what part you need info on. Sometimes the picture is a little off from what you need, but the details, tests, and service information of the parts is very good. I used it when I replaced my TPS for adjustment, and many more things. Including the MAP sensor.

For getting an accurate view of a specific part, which a.U.T.O.Z.O.N.E isn't very good with, the N-A-P-A website seems to be very good at that. Although, they don't offer repair info of any use that I've seen. It does help for locating things though.

PS: Be gentle with the TPS. I thought mine might have a glitch while randomly testing. Voltmeter tests looked fine. But when I tapped on it lightly with the handle of a screwdriver to see if the voltmeter jumped any (a sign of trouble per instructions), the darn thing just quit on me. Totally dead.

Since it was dead, I tore it apart to see how it worked. Turned out, it was cracked on the inside and I never new it. My light tapping finally cut off all current inside of it, making an unknown problem reveal itself. While under driving conditions, the ECM may have been loosing signal from the TPS on occassion.

Hope this helps!
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Saturday, March 25th, 2006 AT 10:48 PM

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