Hello I’m trying to add ac to my truck and am looking for all information pertaining to that. My biggest question is do I need to replace heater box to fit evaporator ? Thank you
Let me start by saying I don't know for certain if the ECMs are different between AC and non-AC trucks. My guess is no. Watching my Quadzilla gauges, what I believe happens when the AC is turned on is the ECM looks at the engine load and throttle position and makes adjustments accordingly. I don't think the PCM would play a role in any of this. Hopefully someone can chime in and confirm this or not.I think the question is if the PCM/ECM is different. These are not mechanical linkage engines, right? The fueling is somewhat controlled by the computer? Not like 16v? So could it be that an AC and non AC computer are different? Wouldn’t that affect the control of relays under WOT and other conditions?
Not opposed to getting in there and dirty. It’s for a truck that I don’t own yet… so there’s lots to think about and decide and plan yet.Removing the dash might seem daunting but there's nothing to it but to do it.
Your over thinking this.
If the drain hole isn't there just drill one.
It's all simple you just got to get your hands dirty.