taylorjm
Full Access Member
Then I'd say get a someone to put a set of gauges on it and see where the problem is.
What do I do now?
- Thread starter Stresst
- Start date
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I went to Pep boys last nite to see what they said. They evacuated / vaccumed and recharged the system. High pressure went up a bit but we noticed that the fan clutch that I had instaled on wednesday is no good. When I accelerated the fan slowed down dramatically so I had it replaced (again). He added about .45 lbs of freon but unfortuntely is was only 82 degrees outside when I left so of course it was blowing cold. But honestly it was only blowing 45 degrees or so and the shop was very close to there wasnt enough distance for it to cool. Hopefully when I get out of work its hotter outside and I can tell what is what.
I ordered an electric fan but I dont want to install it till I figure out what the problem is. I would rather figure it out first then put then fan in for additional cooling. JMHO
So according to Pep Boys you now have the correct amount of 134 in the system, so that is one thing out of the way (over charged or undercharged question).
When it is hot out, try driving on the highway at 70+ mph. This will eliminate any fan problems as you have plenty of airflow at this speed. Cruise for a few miles and keep the temp probe in the vent with the AC on high, recirculate. To make sure the recirc works, put your hand down by the blower and you should feel it sucking air. (just replaced a bad actuator on mine 2 days ago).
Record the temp at cruise. If the vent temp is too warm (over 45ish) try putting the trans in 3rd at the same speed. Doing this should bring the low side down and make it a little cooler, record temp swing , higher or lower or the same.
What were the pressures while at PB's?
When it is hot out, try driving on the highway at 70+ mph. This will eliminate any fan problems as you have plenty of airflow at this speed. Cruise for a few miles and keep the temp probe in the vent with the AC on high, recirculate. To make sure the recirc works, put your hand down by the blower and you should feel it sucking air. (just replaced a bad actuator on mine 2 days ago).
Record the temp at cruise. If the vent temp is too warm (over 45ish) try putting the trans in 3rd at the same speed. Doing this should bring the low side down and make it a little cooler, record temp swing , higher or lower or the same.
What were the pressures while at PB's?
SunlitComet
OBS Jedi-Do Good
Smart.
No, not really! Smart would be if I could figure out why my a/c sucks all of a sudden! LMAO
SunlitComet
OBS Jedi-Do Good
Troubleshooting takes time and involves a systematic approach. It is not always fast and accurate but it does prevent a lot of mistakes.
I just installed a new heater bypass valve and unfortuntaly it did not make one ouce of differance. I even had the garden hose wedged in my grill on full stream facing the condensor and the temp didnt come down one degree.
Gonna bring it back to the mechanic tomorrow for him to tear apart the dash to check and see if the evaporator is clean and if the actuator doors are closing properly. I just dont know if it is better to replace the evaporator being he has it apart. Or maybe buy one off ebay before he tears it apart??? I really dont know anymore!
Gonna bring it back to the mechanic tomorrow for him to tear apart the dash to check and see if the evaporator is clean and if the actuator doors are closing properly. I just dont know if it is better to replace the evaporator being he has it apart. Or maybe buy one off ebay before he tears it apart??? I really dont know anymore!
SunlitComet
OBS Jedi-Do Good
You should be able to drill an access hole in the right place and stick a flexible boroscope to look at it. Below are three methods used gain hole access to disinfect the evaporator. Perhaps one of them might work to inspect it without tearing the dash apart. Blower motor removal is probably the best one.
Application Through Blower Motor Control Module Opening - Remove the blower motor control module (blower motor resistor). Refer to the applicable procedure in SI. - Clean any debris or foreign material from inside the HVAC module and on the evaporator core surface. - Apply the Cooling Coil Coating directly to the evaporator core through the blower motor blower motor control module (blower motor resistor) opening. - Use the flexible wand to direct the Cooling Coil Coating over the entire evaporator core and surrounding gasket surfaces. - When the application is complete, install the blower motor blower motor control module (blower motor control module). Application Through Blower Motor Opening - Remove the blower motor. Refer to the applicable blower motor removal procedure in SI. - Clean any debris or foreign material from inside the HVAC module and on the evaporator core surface. - Apply the Cooling Coil Coating directly to the evaporator core through the blower motor opening. - Use the flexible wand to direct the Cooling Coil Coating over the entire evaporator core and surrounding gasket surfaces. - When the application is complete, install the blower motor. Application Through a Hole in the HVAC Module - If neither of the two previous application methods are available, it may be necessary to drill a hole in the HVAC module. - Locate an area of the HVAC module between the blower motor and the evaporator core. Drill a 10 mm (3/8 in) hole in the HVAC module. Use caution to keep the drill clear of the evaporator core and the blower motor fan. - With the air distribution vents closed and the blower motor fan speed on HIGH, insert the applicator tool into the hole and spray the Cooling Coil Coating into the airstream toward the evaporator core. - Use a GM approved RTV sealant to plug the hole in the HVAC module.
Application Through Blower Motor Control Module Opening - Remove the blower motor control module (blower motor resistor). Refer to the applicable procedure in SI. - Clean any debris or foreign material from inside the HVAC module and on the evaporator core surface. - Apply the Cooling Coil Coating directly to the evaporator core through the blower motor blower motor control module (blower motor resistor) opening. - Use the flexible wand to direct the Cooling Coil Coating over the entire evaporator core and surrounding gasket surfaces. - When the application is complete, install the blower motor blower motor control module (blower motor control module). Application Through Blower Motor Opening - Remove the blower motor. Refer to the applicable blower motor removal procedure in SI. - Clean any debris or foreign material from inside the HVAC module and on the evaporator core surface. - Apply the Cooling Coil Coating directly to the evaporator core through the blower motor opening. - Use the flexible wand to direct the Cooling Coil Coating over the entire evaporator core and surrounding gasket surfaces. - When the application is complete, install the blower motor. Application Through a Hole in the HVAC Module - If neither of the two previous application methods are available, it may be necessary to drill a hole in the HVAC module. - Locate an area of the HVAC module between the blower motor and the evaporator core. Drill a 10 mm (3/8 in) hole in the HVAC module. Use caution to keep the drill clear of the evaporator core and the blower motor fan. - With the air distribution vents closed and the blower motor fan speed on HIGH, insert the applicator tool into the hole and spray the Cooling Coil Coating into the airstream toward the evaporator core. - Use a GM approved RTV sealant to plug the hole in the HVAC module.
SunlitComet
OBS Jedi-Do Good
It is basically a cleaning solvent or detergent. Many names I am sure. But in this case it is used to clean the evaporator of residue that builds up and gives that mildew/moldy smell. Like when you turn on your a/c when the cabin is really warm. Just about every car with a/c has a TSB on how to do it.
