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| NEW! Technical Info: 4th Generation: NON DRIVETRAIN Technical discussion of fourth generation (2007.5 and up) 6.7L equipped trucks. Post your non drivetrain questions, solutions and upgrades here. DO NOT post drivetrain discussions in this section! For trucks with the 5.9L engine use the appropriate 3rd gen forums. |
07-06-2018
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Senior Member
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Join Date: May 2006
Location: Mississippi
Posts: 3,786
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A/C woes
The 07 just doesn't cool like it should.
New compressor, drier and orifice last summer, flushed, vacuumed, and charged. (after the compressor locked up) But it has never done well at idle. I realize it won't do as well at idle as driving because of rpm and air flow, but it should at least stay comfortable. It will stay moderately 'comfortable' while driving in the afternoons.
Bought a set of gauges and the high side is staying Too High, above 400 at idle, engine fan engaged. Low side is at 50.
I'm no AC expert, know just enough to be confused I guess, but seems like there must be a restriction somewhere??
Can't a shop with the right equipment evacuate, FLUSH, and recharge!! 
Any of you pros have suggestions??
__________________
'07, megacab, 2WD, Dually, 6.7, auto,
Deleted, h&s programmer, jasper turbo, ETE tranny, 400k mi !!
'09, quad cab, Laramie, 2WD, Dually, 6.7, auto. 255k mi
Stock, until... 
  My Other Truck is a Fire Engine!!
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07-06-2018
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Administrator
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Join Date: Jan 2004
Location: GOLDEN ,COLORADO
Posts: 19,638
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Pressure is wacked. 55 to 65 low side 215 to 250 high side. Depending on standard day condition. Plus or minus 5 psi both is acceptable based on altitude and temp.
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07-07-2018
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Senior Member
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Join Date: Jan 2005
Location: Abilene, Kansas
Posts: 1,682
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last time that happened to me the orfice tube filter was reclogged
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2005 SLT 2500 3.73 Automatic, reg cab, spray in liner, stull runnin boards,12 volt winch power to bed, slide out loading ramp 4ft by 8ft.Bone stock silencer now MIA 95 gph fass adjustable pump and straw kit
06 dodge 1/2 ton 2wd gasser 4.7 l auto [replacement for giving the son the ford] went to my mother 2016 1500 5.7hemi 10,000 original miles
2014 Cadillac CTS 2.0 turbo
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07-07-2018
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Senior Member
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Join Date: Mar 2004
Location: Tennessee
Posts: 8,569
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I had to clean the orifice tube on my daughter's S10 a coupla weeks ago.....ok now.
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01.5,Red QC Sport SWB,HO,6spd,4x4,cowl hood, Drag Comp,4"ex., fuel press. gauge, boost&pyro gauges, bhaf, single Holley lift pump next to the fuel tank/13psi WOT, Vulcan Big Line, cheapo fuel cooler, Amsoil in the trans. & Valvoline in the pan, 62-65-.70A/R, ARP studs, kevlar/ceramic SD clutch, jammer 100's
Time to turn so's you don't burn.
Quote:
Originally Posted by bigreddog
if I get new gutters every year I never need to clean them  |
True love is when she gives you the ham from her egg mcmuffin 
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07-08-2018
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Senior Member
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Join Date: May 2006
Location: Mississippi
Posts: 3,786
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Those were my suspicions.
I changed that tube twice last summer & pulled both ends of the line loose & flushed it once with brake cleaner & compressed air.
Guess it's time to try it again.
I just Hate opening up an AC system...
__________________
'07, megacab, 2WD, Dually, 6.7, auto,
Deleted, h&s programmer, jasper turbo, ETE tranny, 400k mi !!
'09, quad cab, Laramie, 2WD, Dually, 6.7, auto. 255k mi
Stock, until...
My Other Truck is a Fire Engine!!
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