So i just recently bought a 99 Tacoma 2.7L 4x4. It has a 3inch lift on it and 33inch tires. The first fill up i got okay fuel economy probably 15-20mpg, but i just filled up my truck, and I've gotten terrible fuel economy! I've gone 68 miles and my truck is at the 1/4 fuel mark. It has 129,000 miles on it. It's a California truck that was brung up to Canada. The weather has been really cold here around -30 degress Celsius. I haven't been driving around in 4x4 either. The truck doesn't misfire, it runs fairly smooth, however today i was having a hard time keeping 60mph, i had to keep downshifting into third speeding up and having it floored in 4th and it wasn't keeping the speed limit.
What are known issues and things i should replace first?
Here's a picture of my new Taco.