Power Loss

I just picked up a 00 TRD SR5 extra cab with 105k on it. It has been lifted 3" and has 33x10.50 AT/TAs on it. My question is, are these 33s way too much tire? It seems to be a complete dog, does on through 1st and 2nd, but when I shift into 3rd, it falls flat on it's face. Also barely getting 14mpg, and I can literally watch my gas guage go down as I'm driving. I do think my numbers could be skewed since the speedometer reads pretty slow, that could skew the odometer as well right? Other than this the truck is in pristine condition, just hidelously underpowered. Also, it starts hard when it is hot, but perfectly when cold. Could I have a funky sensor? Thanks!

 

Oh sorry, it's a 3.4. I meant that the engine starts good at ambient temp, but starts hard at operating temp. Regardless of outdoor temp.

 

If you want a little better acceleration, consider swapping out the rear diff gears for something a little shorter.

 

Yes I figured a tune up was in order, I just wanted to know whether 2 inches in tire size made that big a difference. Probably go to 32s when I replace down the road.

 

2" outside tire diameter is definitely noticeable. Couple that with the fact that the motor just isnt that powerfull and you have yourself a much slower (feeling) truck.

 

There are two differentials on the vehicle... Can't just replace one.

OP.. TRD SR5? One or the other buddy

 

I have 33x12.5 and its just fine... or maybe im used to it

 

SR5 is a trim level, TRD is an offroad package. There are SR5 TRD's. Good point on the two diffs though.