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Dodge woes...

wayneswirld2 on Tue May 05, 2009 6:20 PM User is offline

Year: 1990
Make: Dodge
Model: B3500 Van
Engine Size: 5.9
Refrigerant Type: R-134a
Ambient Temp: 85
Pressure Low: 65
Pressure High: 175
Country of Origin: United States

Ran across a bit of a head scratcher this afternoon, thought I'd run it by y'all...we say y'all in Texas. Day care owned 15 passenger 1990 Dodge B3500 van with dual a/c. Retrofit at some point in the vehicles life before me.

Customer complaint of no cold air, was cold last season. Only blows cool, and not that cool at all. Gauge readings are 65 low side, 175 hi side. With system not on gauges read roughly 100 on both sides. If I raise engine RPM I can get the low side to 30 and the high side to 200, but still only blows cool.

Maybe I'm having a brain fart, but it seems to me that I don't have a restriction and it's compressor related. HELP! This customer of mine is sort of tight with money, so we're trying to figure out whether or not to spend anything on it.

Thanks y'all,

If it ain't broke, it probably will need fixin' soon anyways, so fix it NOW.

TRB on Tue May 05, 2009 6:32 PM User is offlineView users profile

Are both evaps not cooling? Dual unit system normally have a little higher pressures than what is listed. Have you checked for leaks and reclaimed refrigerant, evacuated and added back the OEM specifications?


When considering your next auto A/C purchase, please consider the site that supports you:

GM Tech on Tue May 05, 2009 10:07 PM User is offline

Gotta know how much charge is in it? Pull it out, weigh it, and recharge-- If low (probably is) then look for leak and fix...

The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

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