would a bad temp sensor/connector be the cause for all of this?
02-09-2011, 08:31 AM
#1
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would a bad temp sensor/connector be the cause for all of this? 2000 A4 mods: LT headers, lid
so i had a bad O2 sensor, i changed it and driveability has improved, though here are some symptoms i'm having:
-going 50 mph @ 1500 rpms, the rpms would spike to 2000, to 1500, and repeat.
-when starting it up the idle was fine, then when i got home and put it in park the idle would drop to 500 and fluctuate. i noticed the temp gauge would move too.
now when i was changing the header gasket i accidently hit the temp sensor connector and broke it off. the 2 prongs were still there, the connector could slide on and off the sensor, it just wouldn't lock. would that be the cause of all of this?
so i had a bad O2 sensor, i changed it and driveability has improved, though here are some symptoms i'm having:
-going 50 mph @ 1500 rpms, the rpms would spike to 2000, to 1500, and repeat.
-when starting it up the idle was fine, then when i got home and put it in park the idle would drop to 500 and fluctuate. i noticed the temp gauge would move too.
now when i was changing the header gasket i accidently hit the temp sensor connector and broke it off. the 2 prongs were still there, the connector could slide on and off the sensor, it just wouldn't lock. would that be the cause of all of this?
02-09-2011, 08:52 AM
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Yes! The temp sensor definitely plays an important role in adjusting the idle. My temp gauge as well as rpm's started acting funny after a short road trip a few months back. Did a whole bunch of research into what it could be.... Found out the temp sensor was not reading correctly and throwing off my idle. Changed it out in 5 minutes and whallaa!
02-09-2011, 08:52 AM
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My sensor is the exact same way. But I don't think it should cause that much of a problem. Yeah your temp. guage might move or act funny but it shouldn't cause the car to drive bad
02-09-2011, 10:30 AM
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Absolutely incorrect. Next time you start your car, go unplug your temp sender. I'll bet money on the fact that it stumbles and/or dies.
02-09-2011, 11:50 AM
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well i replaced it and it drives much better. i had no idea that something like that could have that much of an effect on drivability. ya learn something new everyday.
i drove around for about an hour and a half, mixed driving and no problems. only thing that happened was some backfiring under a slight acceleration, but other than that the car drove smoothly.
i drove around for about an hour and a half, mixed driving and no problems. only thing that happened was some backfiring under a slight acceleration, but other than that the car drove smoothly.
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02-09-2011, 10:45 PM
#9
It's quite easy to verify the operation of one.
Tie the sensor over a pot of water on the stove, sensor in the water. Get your ohm meter out and watch the ohms change with the water temp.
Every sensor has an established graph, detailing the correct ohms at a given temp.
It's so easy to do, and eliminates the hit or miss of random sensor changes.
Tie the sensor over a pot of water on the stove, sensor in the water. Get your ohm meter out and watch the ohms change with the water temp.
Every sensor has an established graph, detailing the correct ohms at a given temp.
It's so easy to do, and eliminates the hit or miss of random sensor changes.
Last edited by gMAG; 02-10-2011 at 10:17 PM.
