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- - Vacuum pump for AC control? (https://67-72chevytrucks.com/vboard/showthread.php?t=710940)

Nodnarb76

06-27-2016 11:07 PM

Vacuum pump for AC control?

I'm done with my LQ4/4L80 swap on my 87 Suburban, and when I went to tee into my brake booster vacuum line the vent control worked fine but, I lost my power brakes! When I took the tee out, the brakes worked fine again. This tells me for some reason the brake booster lost enough vacuum to not work properly with it tapped into. I'm wondering if I have a vacuum leak between the tee and the other end of the vacuum hose. With a vacuum on the line AC controls work fine. Could I get a small 12v vacuum pump and hook it to the AC control vacuum line?

truckdude239

06-28-2016 03:48 AM

Re: Vacuum pump for AC control?

There is a nipple on fhe right side of the i take you can break off where gm used for vacumn for the climate co trol systems on vans and some trucks

truckdude239

06-28-2016 03:50 AM

Re: Vacuum pump for AC control?

1 Attachment(s)

Here u go

solidaxel

06-28-2016 08:58 AM

Re: Vacuum pump for AC control?

Quote:

Originally Posted by truckdude239 (Post 7637556)

There is a nipple on fhe right side of the i take you can break off where gm used for vacumn for the climate co trol systems on vans and some trucks

That is where I hooked up mine for the 78, works fine!

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