Anyone know where the RPM sensor is located????? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-15-2003, 03:26 PM   #1
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Default Anyone know where the RPM sensor is located?????

I have a small problem with my RPMs suddendly reading at 5000 to 6000 when the engine is really only doing about 3000 anyone heard of this or know where the sensor that controls this is located please share any info will help.
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Old 04-15-2003, 11:23 PM   #2
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are you sure it'* a sensor??
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Old 04-15-2003, 11:42 PM   #3
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I was thinking the same thing. If the PCM was getting false info on the engine RPM, it wouldn't have been running, right? Because the PCM controls the coil pack, and if the spark wasn't n'sync with RPM'*, there would be far worse problems than bad tach readings. With that said, i'm not sure where the problem would be.

Guys, correct me if I'm wrong. All of the above was only my uneducated opinion.
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Old 04-16-2003, 12:14 AM   #4
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Default Re: Anyone know where the RPM sensor is located?????

Quote:
Originally Posted by junkman
I have a small problem with my RPMs suddendly reading at 5000 to 6000 when the engine is really only doing about 3000 anyone heard of this or know where the sensor that controls this is located please share any info will help.
Do you have a remote car starter? If so then there'* your problem! Most remote starter installers splice into the Tach signal wire that goes to the Ignition module. If that connection gets damaged then the Tach signal to the cluster goes haywire.
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Old 04-17-2003, 03:19 PM   #5
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Default remote starter

nope i dont have a remote starter and i think it has to do with me dropping a used motor in the car because it does it less the more I drive the car so hopefully it will just stop all together because i dont believe there is a sensor for this.
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Old 04-18-2003, 12:57 AM   #6
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What year was the new motor from?
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Old 04-18-2003, 10:12 AM   #7
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Default used motor

I paid $400 for a used motor from a 1989 Oldsmobile 98'.
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