Truck is running to cold and I am getting crap for milage and from what I have read is more than likely for my crap throttle response due to the truck not heating up enough to get out of warm up mode and dumping to much gas.

So, it was fun while it lasted but not worth it.

 

are you sure the 180* is working right ? mine warms right up, sits on 180 all day long and works like its supposed to. no mpg problem. if you're not getting up to 180 within a few minutes, you t-stat may be bad.

 

Well, ubnless I got a crap T-stat last week it is good. I warms up just fine to about 170-180, but the milage has started to suck. (more)

Also the guy at the parts store told me that since it is a 180 the truck wont get hot enough to kick in all the emisions crap, so the the truck thinks it is still in warm up mode.

 

I got rid of mine too, bro

 

me too.

 

Warm up mode? Enlighten me, please.

 

I think the parts guy meant open loop. When our trucks are first started the PCM runs in open loop with preheaters on in the O2 sensors until the engine coolant, exhaust gasses, and air intake sensors reach a certain temp. Then the PCM switches to closed mode.
This should only take a few minutes at max.

How many miles are on your truck? Have you changed the trucks environment or your driving habits? Has your weather been changing radically? Perhaps your T-stat merely brought another component problem to light. 180 degrees isn't usually enough to cause the issues you have. A 160 T stat, yes, but not a 180.

I always lose about 1 or more MPG in the winters here myself. OBD vehicles always tend to run richer with colder IAT temps, even with your Coolant temp sensor reading 195.

 

I ditched the 180 and went back to the 195 too.

 

Yeah, the O2 sensors have to reach about six hundred degrees before they generate any voltage to the computer to tell it whether the mixture is lean, rich, or OK.

Until they reach that temp, the computer just uses a preset air/fuel ratio, usually a tad rich. Unless its winter, should only be a matter of minutes. For my truck, usually five or less.

 

Ah, I see. Ya learn something new everyday