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Old 03-17-2007, 04:02 PM   #11
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Hmm..is it under the PCM?
I appologize for the lack of knowledge, but what does a EVAP canister solenoid do?
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Old 03-17-2007, 04:05 PM   #12
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Quote:
Originally Posted by 99SSEI
Hmm..is it under the PCM?
I appologize for the lack of knowledge, but what does a EVAP canister solenoid do?
yes if you remove the push pins for the PCM Box, you will see the round canister

EVAP discription
Circuit Description
The EVAP purge valve allows manifold vacuum to purge the canister. The Powertrain Control Module (PCM) supplies a ground to energize the EVAP purge valve (purge ON). The EVAP purge valve control is Pulse Width Modulated (PWM) or turned ON and OFF several times a second. The duty cycle (pulse width) is determined by engine operating conditions including load, throttle position, coolant temperature and ambient temperature. The duty cycle is calculated by the PCM and the output is commanded when the appropriate conditions have been met:

Engine coolant temperature above 25C (77F).
After the engine has been running about 2 1/2 minutes on a cold start or 30 seconds on a warm start.
The vehicle is operating in closed loop fuel control.
Canister purge commanded duty cycle varies according to operating conditions determined by mass air flow, fuel trim, and. intake air temperature. Canister purge will be disabled if TP angle increases to above 33%. Canister purge will be re-enabled when TP angle decreases below 29%.
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Old 03-17-2007, 04:08 PM   #13
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AWESOME!!
Thanks for the knowledge! I don't have time to fix it now (off to work). Is it critical? Or can damage result from not being engaged?
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Old 03-17-2007, 04:10 PM   #14
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you will be fine without it.
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Old 03-19-2007, 10:12 PM   #15
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Okay, so I moved the PCM and the wire in question is not intended for the EVAP canister. Any ideas?? (wire w/ blue 2 conductor connector)

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Old 03-19-2007, 10:22 PM   #16
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this is for the "hood sensor" as I refer to it as. When shorted, the DIC notices a "hood open" condition.

1993 SLE - Having that electrical connector disconnected on the EVAP purge valve will cause a P1676
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Old 03-19-2007, 10:27 PM   #17
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Quote:
Originally Posted by Hans

1993 SLE - Having that electrical connector disconnected on the EVAP purge valve will cause a P1676
you may want to read again....i never stated anywhere that it would/would not cause a CE light.......
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Old 03-19-2007, 10:52 PM   #18
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The comment was directed toward corvette crazy. My bad. I did not bother reading the entire thread.
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Old 03-19-2007, 11:15 PM   #19
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I'll end the debate by letting everyone know it was the hood sensor.
Thanks everyone for your help!!
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Old 03-20-2007, 12:31 AM   #20
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Glad we got it figured out..you had me wondering WTF that was but then I remembered I pulled that harness when I was looking for PCM mounting ideas.
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