my spedo is off about 20mph , it says im going fater than i really am, and my gas gauge is empty when it reads half of a tank, any ideas?

 

Would help if you told us what car

 

Do you have aftermarket rims/wheels? Are you saying that even while at idle, you speedo reads 20mph?
For the gas gauge, that's an easy fix, fill up the tank and move the needle to full.

 

it goes up to full and goes down to half a tank but doesnt go any further than that so when i hit half of a tank its really on empty, the guy said this stuff started happening when he put the new cluster in it before i bought it

 

Oh this is just great. What car, again?

 

its a eagle talon tsi awd

 

The gas gauge fix that Silver proposed should work... whereas the speedo issue... try removing the pin and remounting it at 0 while at idle...

 

My Gas Meter works somewhat but when i fill my tank allway up it goes to one below full...so i think to three quarters

 

ok, i think that i know how i can fix my gas gauge ill run it till the light comes on then push the thing down to empty, but the spedo goes down to 0 when im not moving but as soon as i start moving it goes to 20

 

it wont go perfect but it will work alittle bit...some problem i had with mine did what you said...when i got it