Have you ever had a stat intermittently malfunction? Every time I have had one go out it is bad or not bad and no in between.

I do know when it is real cold out that the truck does not seem to keep me quite warm enough. I just thought it was do to the crappy cab with air leaks everywhere. Now that I think of it my feet have been getting cool even when the truck is warmed up. I usually keep it on my feet so it never clicked that it was not working just right.

I have also noticed that when the truck 1st warms up that the temp gauge will rise past 3/4. On several occasions I have kept an eye on it because I thought it would over heat. Then once the stat would finally open it would drop and stay just below half or right at the half way mark from then on. It only does that when its cold and cycles for the 1st time.

What do you guys see your temp gauge running at most of the time? In your old air leaking cabs does the heater roast you out or does it barley keep you warm when its real cold?

What controls the amount of heat running thru the carb other than the main engine coolant stat?

I have read thru the manual on the cooling system and the Carb and I do not see where the antifreeze runs thru the carb anywhere but I have been told it does. Do any of you know where this is at on the carb or it function if it in fact does have coolant running thru it?

I also noted in the manual that the carb has a Intake air temperature control system and a Thermo valve. If either of these are malfunctioning what would the symptom be exactly?

Also how are they controlled exactly. How does coolant affect this carb in any way or any of its components? If the engine temp is not registering hot enough could it actuate the choke causing it to load up and act as if its getting to much gas or could something else actuate like the thermo valve or the intake temp control telling the carb to allow more gas than is actually required? I have 7MPG fuel economy and cant run down the exact cause and I am desperate.

To many problem and to few answers. I wish I could throw a lawn mower carb on this thing because I know those like the back of my hand. Small engines are easy this one is not. lol <img src="/forums/images/graemlins/frown.gif" alt="" />