just installed a used ac system, flushed everything out pulled vaccum started charing unit, the problem i am having is i have high pressure on low side of the system read like 120 if not mistaken shold be around 40 to 45 ... any ideas why ? TIA
david
You have a clog, either in the orfice tube or in the dryer.
What is the high pressure reading?? Should be in the 250 range and your correct on the low, 40-45 is perfect.
01' 2500HD 4X4
6.0L 4l80E
stock....
-Chris
hmmm ok the hi side was around 300 the orfice tube is new the accumlator is new, gonna blow through the evaporator and see what happens ...
ok i rechecked and blew through everything once again, i am now thinking is it posible that the tune needs to be programmed or altered, what i am looking at it the reason why i had high pressure on the low side was cause the e fans didnt kick on, now when i jumped the low pressure switch to kick the compressor on one fan came on .... so my question now is ya think its in the tune something needs to be turned on reset or what ? TIA
david
disconnect the jumper for the fans to kick on when the a/c comes on. I had a similar problem with mine. They work great after 1,500 RPM, but at idle they would click on and off, or nothing at all.
Mine - 04 Crew Cab Silverado 2500, 6.0L - L92 heads/intake - 4L80e - 4wd
Wife's - 08 Trail Blazer LT - stock - every option - slow !
Vid of my old Silverado 6L <---
99 Fountain - 27ft Fever - 502 mag MPI :-)
thats just it there not coming on, i cant charge the ac system cause i get a hi pressure reading on the low side .. i was thinking when i turn the ac on to take charge after pulling vaccum one fan has to come on to charge ac system...
isnt this tune related ?
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