Re: one that has been puzzling me for years on a 1.25 Fiesta

In article <_EKip.197962$Bg2.181222@xxxxxxxxxxxxx>, Mrcheerful
<nbkm57@xxxxxxxxxxxxx> writes

you accellerate hard, once it gets to 4,400 rpm it does a sort of jerk and
the power goes down a little

Some kind of software limiting in the ECU to protect the engine? (Since
you say it's "very exact when it occurs")