I have a 98 mazda 626 4cyl with a 2002 motor in it. It cranks and run fine in idle. But when you press the gas pedal and it reaches 2000rpms it blogs down and shakes. Will not go over 40mph.
I've change mas, iac, fuel pump and fuel filter, injector rail and injectors, throttle body, egr, fuel regulator, coil pack, wires and plugs. Checked timing and compression on all cyl is good, catalytic converter and muffler, computer and fuses and I still have the same issue. Dont have a clue asto what could be left to do. Its takes driving a mile to get up to 40mph. Oh yea and I checked fuel pressure which was good. Any help would be appreciated.


