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Generations 8-9 1987-1996 F150 + 1987-1997 F250, F350

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  #11  
Old 08-04-2018, 07:30 PM
fordgirl fordgirl is offline
 
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If I had a dollar for every time you were right...found a complete broken line where that T connector is, AC fully operational! On to the next problem.

Thanks!!
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  #12  
Old 08-06-2018, 03:22 PM
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No prob! Glad to help
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  #13  
Old 08-10-2019, 07:33 PM
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So I’m thinking I have a Freon leak. This seems to be a yearly issue. Again, clutch wouldn’t engage, so I hooked up the full pressure gauges to see pressures and it started engaging intermittently (weird but ok). Both pressures read 50psi, so following a little troubleshooting guide, I visually checked wiring to compressor and then started adding Freon. I could only get the pressures to 85 psi, nothing higher. So my thought is that I have a leak so bad that I can’t even get the system pressurized. However, it does hold pressure at 85 psi (I checked it the next day). So now I’m wondering where to start? J heard there is dye Freon so I can try to see where the leak is? I have no problem replacing parts, I just don’t know where to start.

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  #14  
Old 08-10-2019, 07:42 PM
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Look for oil on any connection, and there is the leak.
Start at the compressor, dont forget the ports where you add and test. Many times the leak is there.

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  #15  
Old 08-11-2019, 02:32 AM
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the dye youll need a UV light to see... even from factory they are prefilled with a high viz green... Mine has a mix of the High Viz Green and high viz red (when i repair my systems i dont have the green dye.. i have red)..

common places ive found leaks tend to be around the compressor pulley and like charlie said the actual fill fittings themselves... the shrader valves have a bad habit of going bad, especially on older systems that have been converted from r-12 to 134a.. being a 95 yours isnt converted.. the high pressure relief valve is another common point for failure as well.. and that silver in line cylinder thats on the rubber lines near the compressor... i frequently find pinholes around the base of the cylinder where its welded together..


something else to keep in mind when it comes to the pressures... your ac system pressures will change depending on heat and humidity outside... the higher the temp outside the higher your pressures will be inside the system... the colder the lower... part of why you need to know what the pressure values are for your particular vehicle at the various temps..
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  #16  
Old 08-11-2019, 01:54 PM
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So I took another look and found the high side port pretty oily. It also hisses when I take the cap off, is this normal?

Do you guys know good resources to find specifics on my truck? Chilton doesn’t have anything on ac and Haynes only has replacing parts.

Thanks!
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  #17  
Old 08-11-2019, 02:40 PM
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Not normal. You found a leak. Maybe the only one, maybe not. There is an oring in there. Sparkey probly has a chart. If not I think I saw one on another site. Once the repairs are made you need to vacuum down the system and have it hold for at least 2 hrs.
Then charge it.

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Old 08-11-2019, 08:01 PM
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Quote:
Originally Posted by dustybumpers View Post
Not normal. You found a leak. Maybe the only one, maybe not. There is an oring in there. Sparkey probly has a chart. If not I think I saw one on another site. Once the repairs are made you need to vacuum down the system and have it hold for at least 2 hrs.
Then charge it.

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only charts i have are for the mustang... dunno if theyd be the same for their truck... what ive always wondered tbh...
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  #19  
Old 08-11-2019, 08:57 PM
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I found them for the trucks, just have to copy paste tomorrow

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  #20  
Old 08-14-2019, 06:00 AM
fordgirl fordgirl is offline
 
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Awesome thanks!!

Also if I am going to evac the system to replace oring and possibly the whole manifold hose assembly (?), is there any other parts I should replace while I’m at it? I don’t have much faith in these newer parts so I would rather not unless you guys recommend it.
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