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#2
10-13-2008, 12:07 PM
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Re: 97 Astro blowing out of def and floor only
Most common problem is that the black plastic vacuum line is cracked. broken, or heat damaged- right where it passes in front of and slightly under the air intake on the engine upper intake manifold- - you may want to remove the air intake snorkel to see it better- no need fo a vacuum diagram- just follow the black plastic line from the conduit (near a/c accumulator- silver bottle) back to where it plugs in behind the a/c compressor- if it is like all the ones I have seen- the line will fall out of place because it is broken.....Repair by splicing in a rubber hose over both ends- no need for clamps- it is a vacuum
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Automotive A/C Engineer with: '99 IH 4700 Toy Hauler (2) '95 GEO Prizms both maroon '99 GMC Yukon '95 Chev 3500, 454 Dually Crew Cab- 145k miles- Wife's Camel trailer puller. '94 Astro- 370k miles '94 Firebird Formula- 5.7L 180k miles- gone- '92 Chevy Lumina Van 3.8L 264k '86 GMC S-15 - 2.8L 154k '87 Buick Park Ave . 187k '86 Buick Park Ave 3.8L 199k miles- gone '77 Chevy Vega- 2.5L 175k miles gone but not forgotten '68 Camaro 396 4 spd RS/SS -72k miles- 
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