Mazda 626 1996

Buy a Mazda 626 1996, recently, when I go approx. Up to 55 miles (88km) the car is going well, but at 3 days I bought to a highway and wanting to increase the speed between 55 and 60 miles (88 to 96km) the car loses strength and does not increase the speed, so I had to go down and go through the streets by up to 55 miles that I did gender, I thought it was the transmission but they check it and they were okay, Gasoline filter, however the problem persists cannot increase to 60 miles or more, what can be, is that the engine is no longer useful?

Be welcome to the forum, try to walk with the car in manual instead of going directly, to see if you get more speed. Yó I opt for change, regulation of the selector or a change of oil+filter (I think that model incorporates it) why are we talking that it is automatic? . You will count, Salu2 ...

The first thing to measure compression, the second when you increase the speed the suffusing revolutions but the speed is stable?

My car is automatic

M If the vehicle is automatic and although it does not pass all the marches anyway to pass 100k/mh although it feues to 3000rpm what may be happening is that you have problems with the fuel pump and sys is that this was not to check sensors with the oscilloscope since it measures the highest and lowest peaks ....