Hi,

Have you had any luck with finding a solution?

I'm sure I've got the same problem with my ST170 as I often get judder as I pull away from a stop. I'm certain it's the engine misfiring and not the clutch as also get the occasional stutter/jerk under load/acceleration. Got the exact same issue on my 1.8 Escort as well and it drives me crazy.

On the Escort I've changed MAF, Leads, PCV, Vacuum Hoses, 02 Sensor and TPS. Had enough of throwing parts at it, especially given the extra cost since I'm in NZ. Took it to Ford once and they didn't manage to solve anything. Have wondered about fuel pressure but short of taping a gauge (which I don't have) to the windscreen, it'd be hard to test given it only tends to happen while driving. To me it feels like an incorrect mixture misfire as it's nowhere near as violent as no combustion at all.

Not sure where to go from here though as I'm a bit sick of throwing money at them without success.