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AC blows wrong?

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Old Aug 21, 2013 | 09:50 PM
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Default AC blows wrong?
In my 1998 v6 4.2 when i have the ac on and hit the gas it stops blowing through the dash and blows strong in front of the wind shield. Is this normal cause it doesn't feel like it? Thanks
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Old Aug 21, 2013 | 10:21 PM
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Check my next post.
Last edited by 03f15012; Aug 21, 2013 at 10:43 PM.
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Old Aug 21, 2013 | 10:29 PM
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may want to check out your blower
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Old Aug 21, 2013 | 10:39 PM
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Apparently its a vacuum issue. Whenever the system loses vacuum, the default is Def. I'd check all the lines and looked for a cracked one. One guy had a cracked hose right behind the battery.
Last edited by 03f15012; Aug 21, 2013 at 10:59 PM.
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Old Aug 21, 2013 | 10:43 PM
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It could also be the blend door. It's a pain in the butt to replace it, so I'd check the vacuum lines first.
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Old Aug 21, 2013 | 11:33 PM
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blend door is just about a deal breaker.
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Old Aug 22, 2013 | 10:27 AM
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Mine was stuck on defrost and I was just a vacuum line pulled out a grommet near passenger feet area
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Old Aug 22, 2013 | 05:42 PM
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This exact same thing is happening to me with the AC on my 4.2. ANybody have any tips on where to start checking the hoses?
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Old Aug 23, 2013 | 12:44 AM
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Had the same problem with a 5.4. It was an old cracked up rubber vacuum line on the passenger side of the engine going to the plenum
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