[stevenisace]

Recently my Ford fiesta (1999) has started to jump when accelerating and seems down on power. I have so far changed the spark plugs and leads but the problem still happens. Anyone got any ideas as to what else it could be? I have also noticed that my MPG as got worse too

[un1eash]

Could be a number of things, fuel, ignition air flow, blocked exhaust cat etc... Best bet would be to get it to a local garage as we'll only be guessing on here.