A/C question!
 

Hey guys these HOT days we have had here have got me thankin! I have a Dodge with the old R12 system, im going to convert to R134A but I know that the 2 refrigerants work at different pressures and the old R12 systems just dont cool as good when converted to 134A. So I was thanking, would installing a bigger condenser and uggrading the reciever dryer help with the cooling in my old truck?? I know I cant really change the evaporator without modifying the heater box but I could install a bigger condenser. What do yall thank??

A larger condenser is always a benefit on hot days because it brings the condensing temp of the refrigerant down to a lower point and reduces flashing in the liquid line.
I have retrofit many R-12 systems to R-134 A on a variety of cars,pickups and trucks,and found that the biggest offender in preventing the system from working properly is in fact the blower motor. Most if not all of the R-12 systems were marginal on cooling well when it was really hot,and with R 134-A having a higher boiling point than R-12 they didn't work well at all. Not because of small evaporators or condensers,but because the evap blower wouldn't move enough air and then it gets worse if the damper won't close or leaks allowing outside air to enter the airstream.

You will still be able to get your system down to 40 degrees. Change out the receiver drier, orifice tube (expansion valve) put about 2 oz of pac oil in the dryer and pull a 30 to 45 minute evacuation vacuum and charge away. 2 cans of 134a should do it. If it is really hot outside put a strong shop fan in front of the grill. That will help keep head pressure down.

make sure you get an orifice tube for r134a, i guess for a 93 dodge if they came with it, I dont know if they still give out r12 ot's at the parts store based on model year...

i have a 2005 duramax does anyone know how to tell when a injector is bad

Hey I see you just joined the site and let me say WELCOME!!! You will prolly get the answer you are looking for in the 2004.5-2005 LLY section!

wait what?

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Service VME - Duramax Injector Wiring Harness Support Bracket Kit - keywords connector P0202 P0207 P2146 P2149 terminal #PIP3525 - (Aug 17, 2005)
Service VME - Duramax Injector Wiring Harness Support Bracket Kit

2004-2005 Chevrolet Kodiak, Silverado

2004-2005 GMC Sierra, Topkick

Equipped with a 6.6L Diesel Engine (VIN 2 - RPO LLY)

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
SERVICE VME

This is a service VME to all Chevrolet, GMC light-duty and medium-duty dealerships for 2004 and 2005 Chevrolet Silverado, GMC Sierra 2500 HD 3500 series trucks and Topkick and Kodiak C4500 and C5500 trucks all equipped with the 6.6 Duramax diesel engine, VIN 2, RPO LLY. The subject is the release of a new injector connector with harness support bracket service kit to repair cylinders two and seven injector connector failures. Please advise all dealer technicians that bulletin number 05-06-04-047, dated August 2, 2005, has been released to SI to correct the following conditions: Some customers may comment on the service engine soon light becoming illuminated along with a severe reduction in engine power. Upon investigation the technician may find DTCs P0202, P2146 or P0207 and P2149. This condition is caused by the injector connection wiring on cylinders two and seven that are not fully supported near the connector and are more susceptible to terminal breakage from engine vibration. If published diagnostics lead to an injector connector, install a revised 90 degree connector and the harness support bracket from the service kit, part number 98017958, using the repair procedures as outlined in bulletin number 05-06-04-047.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

[QUOTE=cumminsf150;778270]wait what?

HAHA sorry I thank the guy just posted in the wrong section I was just trying to help him. Anyway thanks for the help guys I thank im gona see if I can fit a bigger condenser pluse find a better fan for inside the cab! THANKS!

24 Valve changed to 12 Valve now A/C wont work
 

I have changed my 24 valve to a older 12 valve cummins. The air conditioner now will not come on. I have been told the 24 valve computer is not sending a signal to the compressor for it to come on. Does anyone know if this is true and how would I fix this problem...Thanks for any help....

wire it like an old school ac system, power to the ac clutch run through the low pressure and/or high pressure saftey switches, which would be fed by a relay which would be controlled by the ac button on the dash.

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:choochoo::choochoo: