my Mondeo 1996, 3 months ago the engine started to hesitate very roughly, and when i stop at any red light it stall. Then i turn it on and it looks like nothing happens for 20 or 30 km, the starts hesitating again. Then i turn it off and then on again while driving, and hesitation stops for the next few km. If RPM are over 3000... hesitation also stops. If RPM are lower than 2000 the engine stalls. It seems like it is running out of fuel, or dirty fuel, but it is not. My mechanic changed EGR valve, Ignition cables, fuel, oil and air filters, but it didīt fix the problem.
It has been connected 10 times to the computer and no problem appear.
I changed the exaust a year ago, and the engine 6 months ago (my father melt the old one.) with a brand new zetec 2.0 16 v. 3 months after changing the engine this fault appear.
Could be the fuel pump? since itīs similar to the cases of the ford focus. The only diferrence, is when Iīm over 3000 RPMs, works fine, between 2000 and 3000 RPMs, hesitation and lurching everywhere.
Lower 2000 RPM, the engines stops. This failure appears every 10/20 km, restarting the engine everithing is normal again