If only we could hack the ecm with a normal code reader or palm pilot. Then we could program the truck the way we want with out all the other B.S. Such as fan clutch kick in and out temps.

Boy, do I like the older stuff better and better, now a days.


Shawn

 

The sticker under my hood says 1lb 14oz is the stock refill amount. I though I read somewhere (on this forum) that this was incorrect. You are suggesting 1.88lbs, I dont doubt your knowledge, but how do you come up with this figure? If I take my truck to have the AC charged, aren't they going to go off of the sticker? And if its wrong I will be wasting money! Will they fill it to my custom specs?

Oh, and I would like to say Hi to everyone here . My first post and I just bought this truck (2005 3500ctd quadcab auto short bed). After reading most problems I seem to have them all. I will work on the AC first then try and tackle the 70mph vibration. I like this truck, just got a few thing to work out. This forum has lots of good knowledge that I hope to add to.

I am thinking about putting the fan on the condenser like I saw done on the is site. Anyone have anymore updates on this mod. Is it still working?

 

Because 16 oz = 1 lb. Just do the math. If they go off the sticker, it will be 1.88 lbs.

 

Ok, I now understand. Thanks.

 

Replaced my compressor last night and the mechanic noticed the high side pressure reached around 400 PSI. The fan finally kicked in and it dropped. Is this normal or should my fan be kicking in sooner? Is it time for a new fan drive? Or is something else possibly wrong?

This was done in an enclosed shop with no air from anything.

 

This is normal. This is why our trucks will push out refrig. and I have installed a BeCool electric fan on my condensor....

 

Spooler,

Have you notice lower high side pressures with the electric fan?

I was thinking of going with the upgraded hoses. Although, the fan might be a cheaper alternative.

Shawn

 

Yes, it corrects that problem and the high side stays in check.

 

Spooler,

So let me get this right. You are using an external pusher fan to move more air across the A/C Condenser. Which helps keeps the high pressure side pressures in the 300 psi (normal) range. This in turns prevents the blow off valve on the A/ Compressor from releasing the refrigerant to the atmosphere.

How is the pusher fan wired into the truck? Thur a temp switch- relay or driver activated rocker Switch?
Are you concerned about restricted airflow through the big three cores around the fan when not in use?
Since you done this mod. Have you had to add refrigerant to the system?

Shawn

 

Actually A/C systems do slowly leak over time.

The specs for A/C refrigerant lines actually state how much they lose over a given period of time.

If you have low system pressure and the system is still working, just not well, its worth it to top it up vs evac and looking for a leak.

Now if the system is totally empty then you definitely need to look for a leak.

 

I don't have a trans cooler so I mounted 2-12" fans where the auto trans cooler would be. I pulled the cover off the wiring plug on the firewall and found the wire to the clutch to pull in the fan relays. I charged it by superheat and while doing that I discovered the orifice tube is about 2' from the firewall so I insulated between the orifice tube and firewall. Now I have cold air, much faster. How clever of dodge to make the fan come on too late and leave that uninsulated lo-side line under the hood... NOT! Craig

 

I used a Derale relay setup. I did a writeup on here for it. I have had to add refrig but it goes twice as long as it used to. I do think I have a shrader valve leaking on the low side. Got some dye in it this time to see if I can find it. No issues under a vaccum. No issues with restricted flow.

 

A/C Condenser Fan

My system, at nine years, is in need of replacement (as I have another nine years to go and don't want to crutch it along). But some upgrades are cheap and easy as funds accummulate:

1] Heater core bypass
2] Pusher fan

And a cheap set of gauges to keep system topped up for now.

.