sensors controlling timing advance - TCCoA Forums
 
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post #1 of 7 (permalink) Old 05-06-2014, 08:50 PM Thread Starter
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sensors controlling timing advance

I have a 91 3.8 and the computer is not advancing my distributor. Does anyone know what sensors I could be checking out? When I built the engine I noticed that it didnt have a knock sensor.

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post #2 of 7 (permalink) Old 05-06-2014, 10:13 PM
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I'd first check to see if the SPOUT plug is in, since its whole purpose is to tell the ECU "Hey, don't do any advance, we're working on the timing!"

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post #3 of 7 (permalink) Old 05-07-2014, 04:55 PM Thread Starter
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That's fine. I've replaced the pick up in the distributor, the control module, and I have a different computer with a chip. The problem is still there. That's why I'm thinking there is a bad sensor, or something not allowing the signals to get back to the computer.

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post #4 of 7 (permalink) Old 05-07-2014, 08:31 PM
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If you eliminate the chip, does it advance?

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post #5 of 7 (permalink) Old 05-07-2014, 08:44 PM Thread Starter
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No. It did it with the old computer too.

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post #6 of 7 (permalink) Old 05-08-2014, 09:55 AM
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Have you checked the wiring for the SPOUT connector, all the way back to the ECM? An open there will cause the ECU to see the SPOUT plug removed, thereby forcing fixed timing.

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post #7 of 7 (permalink) Old 05-08-2014, 07:39 PM Thread Starter
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After you mentioned the spout I started thinking that that would be a good place to start.
I'll start there.

Thanks,
Curt.

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