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Old Apr 24, 2018 | 03:22 PM
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On cold start-up the smog pump runs for like 4 minutes than shuts off--service guy at dealership said--the pump can come on at anytime the computer commands to--true?
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Old Apr 24, 2018 | 03:35 PM
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Old Apr 24, 2018 | 03:35 PM
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Technically yes, the computer controls the pump.
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Old Apr 24, 2018 | 03:37 PM
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Originally Posted by JR-01
I think the gm guy--said --when hot on start-up it can command pump on--not when your driving--just at start-up
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Old Apr 24, 2018 | 03:39 PM
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Originally Posted by royal flush
I think the gm guy--said --when hot on start-up it can command pump on--not when your driving--just at start-up
I know nothing about the pump. Just here to learn something.
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Old Apr 24, 2018 | 03:47 PM
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it runs on startup to heat up the cats for emissions ???? worthless !!! I have mine gone and tuned out !!! (much more room under the hood with the junk plumbing gone !!!)
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Old Apr 25, 2018 | 12:02 AM
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Moved to C5 Tech.
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