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Old 03-12-2016, 04:16 PM
Tech II Tech II is offline
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Re: 04 Blazer runs great till it warms up then dies

Both codes represent a lean condition in both banks.....

Could be a bad MAF.......a vac leak affecting both banks......low fuel pressure.....make sure the snorkel to the throttle body is tight, with no leaks after the MAF....
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