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aceremmer
New User
Aug 21, 2012, 10:21 AM
Post #1 of 7
(1700 views)
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check engine light
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i have a 2001 chevy express van .v-6 4.3L engine. the check engine light keeps coming after resetting the computer. I have bought a new gas cap , a new purge valve solenoid and had a smoke test done and a pressure test with a constant 1 lb of presure thruout the system . Any new idea s would be helpfull Thanks ,Don
D.D. Thibeau
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Discretesignals
Ultimate Carjunky
/ Moderator
Aug 21, 2012, 11:10 AM
Post #2 of 7
(1671 views)
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Re: check engine light
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What is the trouble code number?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Discretesignals
Ultimate Carjunky
/ Moderator
Aug 21, 2012, 5:30 PM
Post #3 of 7
(1628 views)
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Re: check engine light
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P0446 means the computer has detected a blockage or restriction in the EVAP system. It's not a leak code.
While the engine is running the PCM can test for a blockage or restriction by commanding the purge valve open and the vent valve open. The PCM expects to see no vacuum building up in the tank. If it does, the PCM suspects there is a blockage or the vent valve isn't opening. Don't be surprised if you have a problem with the vent valve.
You need to command the purge valve open while the engine is running and monitor the fuel tank vacuum with a scan tool. Verify if there is indeed a problem. If so, you need to check for blockages in the system.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Aug 21, 2012, 5:32 PM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 21, 2012, 5:33 PM
Post #4 of 7
(1620 views)
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Re: check engine light
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Was there a post identifying the code number or did this happen in PM?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Aug 21, 2012, 5:34 PM
Post #5 of 7
(1614 views)
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Re: check engine light
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I got PM'ed. Sorry I should have stated that.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 21, 2012, 5:38 PM
Post #6 of 7
(1609 views)
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Re: check engine light
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He should have posted here, not in PM. It really messes up the archives if only half the discussion is there to be read by others.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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