AC gauge numbers.
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Fleet Mechanic
Joined: Oct 2025
Posts: 1,883
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Yes, a blocked orifice tube will be readily evident.
think of the tube as a screen. It will either be clean and let gases pass through, or dirty and not let gases pass
as for the compressor, there is no real test i have ever found short of opening the system and looking for signs of failure like pieces pieces in the lines..
if it is the original compressor, I would just replace it. They are cheap, you can usually get a compressor, receiver drier, office tube, or ring kit for under $200. And a kit with all that AND a condenser for around $300
think of the tube as a screen. It will either be clean and let gases pass through, or dirty and not let gases pass
as for the compressor, there is no real test i have ever found short of opening the system and looking for signs of failure like pieces pieces in the lines..
if it is the original compressor, I would just replace it. They are cheap, you can usually get a compressor, receiver drier, office tube, or ring kit for under $200. And a kit with all that AND a condenser for around $300
I was looking at kits on parts geek and discount ac parts. I have a running list on Rockauto also haha. I’ll just get the compressor also that way it’s one and done (hopefully). That will leave the evap core original… I recently pulled the box cover off, insulated and resealed it. That was a pain.
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Fleet Mechanic
Joined: Oct 2025
Posts: 1,883
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That same scenario almost happened when I was swapping leaf spring hangers. 6 hrs into grinding and I was seriously contemplating unhooking the fuel filter and whatever happened, happened! On my 90, all I would have to do for evap is to remove side cover on box. 88 is different?
i ain't rite
Joined: Mar 2005
Posts: 65,591
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From: Marlboro Mental Hospital.
not sure, i never really looked too hard into it because the cab was beyond saving and i had an almost new 35 year old 87 F150 cab. truck sat in a garage unused for 35 years with only 900 miles on it. guy bought it and realized it was too small, so he bought a 350 and gave the 150 to his son. who then hit a tree and parked it in the garage until 22 when the father sold the house. he gave it to a friend of mine who wanted the engine for his 94 that was REAL tired. i took the cab, bed, and front fenders for my 88
i ain't rite
Joined: Mar 2005
Posts: 65,591
Likes: 5,621
From: Marlboro Mental Hospital.
yea, they ran a large body shop and had more money than they could spend in 10 lifetimes.
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Fleet Mechanic
Joined: Oct 2025
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I have a client that has me do a dump run for him once a year. Not joking, it’s to take all of his electronics that he got mad at during the year and smashed to pieces. He puts them in boxes under his deck and has new ones delivered the next day…
Laughing Gas
Joined: Oct 2014
Posts: 949
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From: Carnation, Wah
If it was a post- 91, I was going to say check for vacuum leaks.
Mine leaks enough that the doors close whenever I use more throttle than cruise....
t
will get around to that one of these... decades...
Mine leaks enough that the doors close whenever I use more throttle than cruise....
t
will get around to that one of these... decades...
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Fleet Mechanic
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One of the areas I’ve already replaced! It was one of those deals where it kept breaking every time I touched a “good area” to attach to. After the fourth time, I said screw it and replaced it all.
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