Slow to Warm Up

[capy]

My 91 sport never gets up to operating tempreture. Since temps have been colling off this Fall the engine temp gauge has not been getting off C. I will get some warm air after a while from the heater but it takes a while. My gas milage has also been low about 12-13 mpg around town. I am planing to change the thermostat this weekend but was wondering if I should check anything else while I am at it. Any advice would be appreciated.

 

[Explorer58V8]

sound like your on the right track.... just make sure your anti freeze is good..... also check your vaccume at the brake booster... make sure its between 20-23 in hg.... and stable....not jumping around.... low vaccume can also not allow the vents in the a/c system to close and open...

d

 

[JUST4X4FUN]

i would flush the system too , as long as you are
in their. just my.02 cents ....Larry

 

[LOGJOCKY]

I also have the same problem. My x dosen't run ever over the "N" in norml on the guage. My antifreeze is good till -50 and I borrowed a summer front from work to help warm it up( soon to be a winter front ) BEsides the obvious loss in milage what other problems are associated with not running hot. It runs hot enough so It wont wear prematurly but I would like the better milage. I usually get 350-400k per tank.

 

[Jag]

Your thermostat is stuck open.

I've replaced mine several times.

 

[mrboyle]

Originally posted by LOGJOCKY
I also have the same problem. My x dosen't run ever over the "N" in norml on the guage. My antifreeze is good till -50 and I borrowed a summer front from work to help warm it up( soon to be a winter front ) BEsides the obvious loss in milage what other problems are associated with not running hot. It runs hot enough so It wont wear prematurly but I would like the better milage. I usually get 350-400k per tank.

Beside loss of gas mileage, you are likely to experience increased carbon buildup, loss of performance and reduced throttle responce.