1998 Ford Escort running rough

[quote:86c60cb612="sterob_sc"]Engine problem
1998 Ford Escort 4 cyl Two Wheel Drive Manual 82997 miles
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my escort seems to be running on 3 cylinders most of the time and sometimes when i just tickle the accelerator with my foot it sometimes runs on 4 but only on high revs ive changed all the sensors apart from crank and camshaft ive changed the air flow meter and the coil pack its sparking on all 4 cylinders could you please help me as what to do thank you[/quote:86c60cb612]


I would start by doing a cylinder balance test .
do you have a check engine light ?
if so scan for code
check injectors and clean if needed

let me know