Question about 1995 Ford Bronco
I have a 95 Ford Bronco, 351, Eddie Bauer, and for the last few years the AC and heat cut out when you're gassing it or going up hill. The AC holds a charge and works fine so, I'm guessing that since it's doing the same with the heat, maybe some sort of vacum line or something like that? Thanks in advance for your help.
I had the same problem on my 95 XLT 351. It was the vacuum tube going into the ac/heater box on the passenger side near the firewall. The tube was rotten.......I replaced it and BAM.....all fixed.
Posted on Dec 03, 2009
This is by design, there is a WOT [wide open throttle] cut out that cuts your ac off to be certain you have full horsepower for passing.
Posted on Jan 08, 2009
I just found this on another site ------
The doorsa in your heater case that control which vents the air blows out of are operated by engine vacuum on this model. The vacuum is supplied through a hose that passes from the heater control assembly out through the firewall to the intake manifold.
When youa ccelerate, it causes a sudden drop in engine vacuum. To prevent this sudden drop in vacuum level from affecting the operation of your heater/ ac system, there is a plastic one way check valve located somewhere in this hose out under the hood; this lets the engien draw on the hose but prevents loss of vacuum from the hose if engine vacuum drops too low.
Your problem is being caused either by a cracked/ leaking vacuum hose, or a faulty one way check valve in the hose. There is also a vacuum reservoir in the system to maintain engine vacuum during acceleration.
If you investigate the vacuum connections out under the hood, I am sure you will find the problem in that area.
It makes sense to me - moonracer666
Posted on Jan 24, 2009
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Posted on Jan 02, 2017
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