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help needed engine stuttering/jerking when accelerating

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Old 04-05-2011, 08:32 PM
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matty_
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Default help needed engine stuttering/jerking when accelerating

hi, first post so some simple advice would be appreciated,

right i have a 1998 ford fiesta 1.25 zetec,
engine was running fine but then the car started stuttering/jerking and i noticed that i was low on petrol so just thought it was this, but i was wrong.
now the car stutters/jerks while accelerating hard, mainly in 2nd.3rd gear but does it in all,
i checked all spark plugs and HT leads they seam fine,
topped up with fuel,
replaced TPS
cleaned throttle body with carb cleaner, but the engine still stutters

could it be a dirty/clogged fuel filter? or anything else.

BTW the car idles ok-ish it idles about 1100, but drops and rises a little but nothing major, thanks guy

matt
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Old 05-05-2011, 07:13 AM
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oldford
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High idle is an indication of an air leak. Check for split/cracked hoses.
Is the exhaust completely leak free? Check around the oxygen sensor.
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Old 05-05-2011, 10:01 AM
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lockhead
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Could also try to disconnect your MAF, this will make the ECU use a pre-stored value instead of that from MAF. If that dosn't help, stop guessing and get a faultcode read out done. Might be a problem with the harness to the TPS aswell, Autodata had some notes about that being a standard issue...

Good luck!
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Old 05-05-2011, 10:05 AM
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matty_
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ive already disconnected the MAF, this did reduce the jerking but it was still happening, thanks for the helps guys
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Old 05-05-2011, 10:09 AM
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forgot to mention, NO ENGINE MANAGEMENT LIGHT HAS COME ON

matt
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Old 05-05-2011, 10:40 PM
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Alvyn
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try a new coil!
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Old 06-05-2011, 03:17 PM
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Originally Posted by Alvyn
try a new coil!
yeap, i have 2 near new coils and leads on their way as i know the fiestas have this problem, so hopefully one of them will work.
cheers guys
matt
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