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-   -   Do these ohm readings inidicate dead throttle sensor? (http://forums.pelicanparts.com/porsche-924-944-968-technical-forum/630285-do-these-ohm-readings-inidicate-dead-throttle-sensor.html)

clayperez 09-17-2011 07:12 PM

Do these ohm readings inidicate dead throttle sensor?
 
I have had a 1986 951 sitting in my garage for a couple of years now -- runs, but won't pass smog; idles funny; backfires periodically; instrument panel warning lights are ALL on all the time.

It's got gremlins for sure.

I haven't touched the car in a couple years. But I'm feeling driven to get it back on the road and start bringing it back to life. So as a first test I measured the resistance according to this guide [here], and it appears to be indicating at least the source of the first gremlin.

My ohm reader at idle is reading 85.5k ohms (not 0 as it should be). At WOT it's reading infinity as it should be.

Has anyone run this test before, and has replacing their throttle body sensor (or repairing / cleaning it) fixed the issue?http://forums.pelicanparts.com/uploa...1316315499.jpg

Arizona_928 09-18-2011 09:18 AM

TPS Repair

Arizona_928 09-18-2011 09:24 AM

basically connect ohm meter at 20k to 2 & 3, or 3 &1. (3 & 1 are reversed) The trick is when when sweeping the range look at your voltmeter for jumps in resistance or 1 (infinity)
it should go from .6-4.7 ohm. Go slowly and make sure it comes back down evenly. I just tested mine. It's good. :)

Arizona_928 09-18-2011 09:25 AM

4,5,6 when connected should show 0, and 1 as soon as you move the throttle.


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