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Forums/Z31P/z31-basics basic-modifications-basic-questions-aka-the-newbie-forum/When I accelerate, my air stops blowing cold. Foot off gas pedal it blows cold again.

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Imported from Z31Performance.com Forums{{#if:MKS71| — original post by MKS71}}{{#if:2019-06-12 00:58:54|, posted 2019-06-12 00:58:54}}{{#if:6| · 6 post{{#ifeq:6|1||s}}}}{{#if:/Z31performance_archive/forum/z31-basics/basic-modifications-basic-questions-aka-the-newbie-forum/543538-when-i-accelerate-my-air-stops-blowing-cold-foot-off-gas-pedal-it-blows-cold-again.html|
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MKS71: (2019-06-12 00:58:54)

As the title states, when i'm cruising along at a steady speed, my air is just fine, but if I get on it a little, my air stops blowing cold and just blows warm or less cooler air. I have recently replaced some vacuum lines and my air is working fairly well except this issue. I have searched some of the Air Conditioner posts and it's like finding a needle in the haystack if it's not mentioned in the title. This has been going on for some time and I just realized that the lack of cold air is related to the gas pedal. I would appreciate any help from experience. Thanks in advance. Mike

albionwanderer86: (2019-06-12 01:14:01)

More than likely it is a vacuum issue, practically everything in the HVAC system runs off a vacuum source. Your best bet is to get a vacuum diagram of the HVAC system and start checking line by line.

kaur: (2019-06-12 15:01:39)

Turbo or not? I had the same issue and it was a leak between the vacuum pump and plenum. When the turbo raised pressure in the intake, the vacuum for the climate controls was gone.

MKS71: (2019-06-13 00:31:55)

Non Turbo, sorry, I forgot to add that So it's a 87 NA auto

FlyingT: (2019-06-17 22:35:23)

Vacuum system info

http://300zx.tombeauchamp.com/service.shtml#052204

Attached Files

CCvaclines.jpg (91.7 KB)

charcan.jpg (133.6 KB)

fpr.jpg (102.3 KB)

htrconvalv.jpg (52.3 KB)

FlyingT: (2019-06-17 22:42:06)

More vacuum info

Attached Files

udash.jpg (100.3 KB)

vacpump.jpg (38.2 KB)

vactank2.jpg (32.9 KB)

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