Ford Fiesta ST
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#562861 - 29/10/18 10:54 AM 07 Fiesta Jerking when cold started
appleboy Offline
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Registered: 29/10/18
Posts: 3
Hello members, i know my fiesta isnt an ST version, but i have nowhere else to search and ask for help.
So in the mornings when i go to work, i always start up my car to warm it up while i take a smoke, for years it was okay, and now in the past 2 months it has started to jerk, but only when im driving, while it sits i can easily rev it up and it doesnt jerk, but as soon as i put it in gear, 2nd,3rd,4th it jerks for first 5 minutes(while driving), then, my guess, the transmission fluid heats up and it doenst jerk for the whole day.
Could it be transmission fluid? (recently i changed out pusher bearing for my clutch and selector for my gearbox, at the ford dealership. they said everything is fine with gears and stuff)

My car: Fiesta 2007 MK6 1,3 petrol. (221000km)

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#562882 - 05/11/18 09:43 PM Re: 07 Fiesta Jerking when cold started [Re: appleboy]
YellowBadge Offline
MountooningTipster

Registered: 26/08/07
Posts: 11389
Loc: here
could be the proverbial throttle body, always worth a clean anyway as they get carboned up, clean it with carb cleaner carefully and don't push the flap.
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#562900 - 11/11/18 12:31 PM Re: 07 Fiesta Jerking when cold started [Re: YellowBadge]
appleboy Offline
Stranger

Registered: 29/10/18
Posts: 3
This morning when it was jerking the check engine light flashed for couple of seconds, RPMís did not drop, i read that it may be the catalytic convertor, could it?

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#562901 - 14/11/18 12:37 PM Re: 07 Fiesta Jerking when cold started [Re: appleboy]
appleboy Offline
Stranger

Registered: 29/10/18
Posts: 3
Problem Solved - Spark Plug cables were broken and rubbing against each other. Changed the spark plugs and wires and everything is fine.

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#562902 - 14/11/18 01:32 PM Re: 07 Fiesta Jerking when cold started [Re: appleboy]
YellowBadge Offline
MountooningTipster

Registered: 26/08/07
Posts: 11389
Loc: here
crikey
_________________________

MR200 Stage 3 200PS
Evans Halshaw
Mountune Pro

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