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Old 07-19-2013, 07:22 PM
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Dodge Ram Forum Senior Member
Join Date: Mar 2011
Location: New Jersey
Age: 62
Posts: 209
Gender: Male
Vehicle: 2009 Dodge Ram 1500 Crew Cab
Trim Level: Sport
Color: Deep Water Blue
Engine: 2009-???? 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
astroman54 will become famous soon enough

Ahh.. You're talking PSI, not lbs.. When the compressor starts, the low pressure side should drop and the high pressure readings should go up.. The pressures need to correlated to the ambient temperature.. See the link here for a better explaination and PSI chart.

2009 Dodge Ram 1500 Sport Deep Water Blue Crew Cab Hemi 4x4
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