Diesel-Dan
Just another Texas Boy...
- Joined
- May 9, 2006
- Messages
- 536
Just read link from 1st post. If low side is pulling to 0 either restriction or low charge. Psi you should be seeing is around 35 low and 180ish hi. It's the compressor shut off when the low cycling switch was hot wired it's a definite restriction most likely from the compressor chitting itself.
Refrigerant pressure sensor could cause this. You would need a scan tool to see data. It's the 3 wire sensor on the compressor discharge hose or on the compressor it's self. It will shut down compressor clutch if it sees 400+ hi side psi.
Hmmm-so take it to gm dealership and have them put a tech 2 on it? I can just picture the mouth breather telling me its my flux capacitor right now....
I needs a compressor. If you are making it run manually and that's the pressures you are getting then that's a definite failure...
Well I don't exactly do the whole mouth breathing thing......
Reading threw all the posts, with your findings and what has been suggested it sounds low on charge or the compressor/clutch has given up. You not seeing any sort of sign of a leak does not mean it will not be low on charge. I think the rule of thumb is 10% loss of charge in a year. 2005 truck should take 1.6 maybe 1.8 pounds? 8-10% over the past 8 years.
The 6.6lEater+ guy you have been kind kicking around has just as many certifications as I and has been working in the stalls next to me for the past 11 years. I would not count anything he has to say out. I would put him up against any driveabillity, electrical, auto transmission tech in Merica and would win. I'm the smash and grab heavy line guy in our dealership. Guess what I'm saying is trust what he has to say.
Now back on track. I have a really good friend that used to work with both 6.6 and I down in the Dallas area. I can contact him and see how his work load is right now at his dealership. He used to like to do side jobs here in AZ, if I call this in to him he will probably work on the cheap. He likes Coors light and hookers.
I'm sure he will make the decision weather or not he feels qualified enough to tackle this. If there is any doubt or uncomfortable feeling then stop and take it to someone. I thought I remember reading earlier that he had messed with hvac but had been awhile since.
How many cases can he drink....