Ford Fiesta 1.25 Zetec S 2000 Reg Misfire Problems

[tmzy]

hi my friend has this fiesta which missfires on idle and low revs mainly. i told him to change the plugs and leads in that order. lol cheapest first. but still missfires. but it has improved it. i told him the next step is replace the coil pack but he wants to know if there is anything else that might cause it. as i dont own a fiesta i dont know if it is a common problem on them.

thanks in advance

tommy

[Nighthawk]

It could be the idle control valve if its idling uneven.

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[tmzy]

it idles fine. only when it missfires. the miss fire is not continuous on idle. it used to before we changed plugs and leads

[mick85]

Could be injectors I would test coil pack with multimeter and do possibly do compression test before spending to much

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[tmzy]

ok i will see if my friend has a multimeter to test coil pack. didnt think of that. will get back to you

[MattDRX]

TB sticking? it is something that never ever gets cleaned, might just want a grease on moving parts and filled with carb cleaner to clean it out.

[tmzy]

have put a multimeter on the coil pack. it was the coil pack causing the missfire. have replaced it now its running fine again thanks alot