Rep Power: 0

i dont know why but my gas mileage went from 33 to bout 15 - 20 and idk whats goin on no change in driving habits. lots of hesitation from stop. ive used engine restore, fuel injector cleaner and a new oil filter and oil change. I had also put on a k n n filter on it and then that was when the gas mileage went downhill idk what it is though. Can someone please help me or tell me where to go for help????

Thanks in advance!!!!

 
Rep Power: 0

Check that your spark plugs are good and gapped correctly. Also see if your injectors are spraying enough. Even though you use the injector cleaner it could be plug some how. And it also depends on your driving style.

 
Rep Power: 0

did it happen suddenly?? or over time...

if this happened out of the blue.. then it might be something major...

if it was something progressive you prolly just need a tune up... and run some seafoam

 
Rep Power: 247

Check your compression.

Could also be a bad O2 sensor. Is the check engine light on?