so its getting hot here in the valley and i switched back to the zzp ecm from the gms3 so i can use my a/c but im not using it yet... and i noticed a deffinate decrease in mileage! i was seeing about 33-38 mpg highway now im seeing only 30 but thats not where its terrible, in the city im only seeing like 20 mpg avg and with stage 3 i was seeing 27 mpg avg and my driving style has not changed... i go approx 8 mi to and from work mostly city some highway anybody else see the same results? and i basically drive around in vaccum maybe 1-2 psi boost...

 

take your accelerator off the floor?

 

you do know that the a/c sucks up gas like its cool right? takes more power to run it.

 

well i should of metioned that im not using a/c yet just incase i need it...
and yeah a/c uses a ton of gas on 4cyl cars not so much on v-8s

my foot off the accelorator? i would be getting close to 0 mpg if that were the case... i have so many mods now that i worry about my #4 piston! i make it a point to drive around in vaccum or at 0hg and only get on it when someone in a fast car is on the same street and they possibly wanna run one from light to light... you know a little fun before work...

 

A/C doesn't take that much. Averaging out an all A/C tank versus a windows down tank, the difference was only about 2-4 mpg every time I measured. Mythbusters had a very large difference in milage, but then they were using SUVs in their test.

 

interesting i never actually logged milage with it on and off, its just i can feel the engine power being reduced when its activated