throttle position sensor...
10-11-2004, 04:11 PM
#1
Guest
Posts: n/a
throttle position sensor...
I was adjusting my throttle position sensor to see where it seems to run better at...when I tilted it completely one way, it would idle at 800rpm, completely the other way and it would idle really high, about 1900rpm (completely warm) so I tilted it completely to where it would idle at 800rpm. I broke one of the tightening screws on it, i wasnt even torking it and the head of the bolt broke off....so i had to tighten the 1 remaining one and it seems ok for now. Is there anyway I can check with an ohm meter what ohm its running at idle while car is on...do i need to unplug the connector to it?
10-12-2004, 07:35 AM
#2
Junior Member
Join Date: Sep 2003
Posts: 36
I had a hard time adjusting mine (TPS) but finally got it. I kinda did it your way and then adjusted the idle. I have had hesitation problems in the past but after chasing it for about 3 weeks I fixed it. This forum has being great and this website may help you on your adjustment http://www.zhome.com/ZCMnL/PICS/hesi...esitation.html
10-12-2004, 09:47 AM
#3
The TPS should always be set to factory specs. If you have an automatic, you can screw up your tranny by altering the setting.
Unplug the throttle position sensor sub harness connector. That is the little connector dangling off the TPS. There are three male connectors. A, B, and C. With your ohm meter and the engine off. Check the continuity between B and C terminals. It should be around 1K ohm with the throttle body plate fully closed. And it should be 9K ohms with the throttle body plate fully open. And it should be between 1K and 9K, when the throttle body is partially open.
So, to start, just set it to 1K ohm when closed. Once you set that, tighten the screw, check it again. Then see what "fully opened" reading you get. If it's below 8K or above 10K, I would consider buying a new TPS. But make sure you set it to the 1K when closed b/c that effects your idle and (if auto), it will affect your shift points DRASTICALLY (for the worse!).
I drove around for over a year with my setting at 1K closed and 7.5K open. I got a new TPS and now I am 1K closed and 9K open.
Edit: BTW, one of my 8mm bolts broke too. I was able to get a pair of needle nose pliers to sort of unscrew the little bolt. For a bolt that small, it's dang near imposible to find an EZ out small enough to remove the screw.
Unplug the throttle position sensor sub harness connector. That is the little connector dangling off the TPS. There are three male connectors. A, B, and C. With your ohm meter and the engine off. Check the continuity between B and C terminals. It should be around 1K ohm with the throttle body plate fully closed. And it should be 9K ohms with the throttle body plate fully open. And it should be between 1K and 9K, when the throttle body is partially open.
So, to start, just set it to 1K ohm when closed. Once you set that, tighten the screw, check it again. Then see what "fully opened" reading you get. If it's below 8K or above 10K, I would consider buying a new TPS. But make sure you set it to the 1K when closed b/c that effects your idle and (if auto), it will affect your shift points DRASTICALLY (for the worse!).
I drove around for over a year with my setting at 1K closed and 7.5K open. I got a new TPS and now I am 1K closed and 9K open.
Edit: BTW, one of my 8mm bolts broke too. I was able to get a pair of needle nose pliers to sort of unscrew the little bolt. For a bolt that small, it's dang near imposible to find an EZ out small enough to remove the screw.
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