MegaDestroyer Posted June 26, 2008 Report Share Posted June 26, 2008 so i gotta 91 buick regal with a 3.1.just recently replaced a lifter and got it all back together and what not it runs normal and good and all again BUT when i turn on and turn up the ac or heat..no air is coming thru the front vents on my dash.. only the vents under my dash and the defog vent...why is this and what do i gotta fix? Quote Link to comment Share on other sites More sharing options...
White93z34 Posted June 26, 2008 Report Share Posted June 26, 2008 there is a "vacuum check valve" under the hood on the driver side, it is kinda round with 3 vaccum lines coming out of it. thats most likely the culprit. Quote Link to comment Share on other sites More sharing options...
rockfangd Posted June 27, 2008 Report Share Posted June 27, 2008 how much does it blow, do the speeds work or is it always the same? Quote Link to comment Share on other sites More sharing options...
theghoul Posted June 27, 2008 Report Share Posted June 27, 2008 there is a "vacuum check valve" under the hood on the driver side, it is kinda round with 3 vaccum lines coming out of it. thats most likely the culprit. X2 Made noise but didnt blow much air. A vac line popped out. Quote Link to comment Share on other sites More sharing options...
Drummer Posted June 27, 2008 Report Share Posted June 27, 2008 possibly the valve is broke or a line popped off or was even dry rotted and cracked Quote Link to comment Share on other sites More sharing options...
LuminaPower92 Posted June 27, 2008 Report Share Posted June 27, 2008 there is a "vacuum check valve" under the hood on the driver side, it is kinda round with 3 vaccum lines coming out of it. thats most likely the culprit. X2 Made noise but didnt blow much air. A vac line popped out. x3 My Caddy did this same thing, turned out after fixing the vacuum mess that was under the hood, the vents blew on the panel. Quote Link to comment Share on other sites More sharing options...
MegaDestroyer Posted June 27, 2008 Author Report Share Posted June 27, 2008 yea i remember when puttin it back together the vacum lines didnt seem right il check there..but it sounds like thats it.. Quote Link to comment Share on other sites More sharing options...
MegaDestroyer Posted June 27, 2008 Author Report Share Posted June 27, 2008 oh and the speeds all work and blows hot or cold.so yea dank il check it out Quote Link to comment Share on other sites More sharing options...
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