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Ford Fiesta 1.3 2002 - Persistent misfire under load # (waveforms)

Posted by Malcolm Tripp on July 3, 2013, 10:18 pm

Year of Manufacture *: 2002
Engine Size and Code *: 1.3 DURATEC
( Optional ) Scanner Used: PICO
( Optional) Fault Codes: NONE

Car has a persistent miss under load, scoped cam and crank sensors ( attached )

There looks to me to be a fair gap from TDC and the cam pulse, can anyone shed any light on this.

Timing chain is quiet but I have not had the top off yet until fairly certain.

All other sensors have been checked and are working fine.

Re: FORD FIESTA MISFIRE

Posted by Dave Harney <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT2603' width='330' height='300' border=0 style='border:none;'> on July 4, 2013, 10:21 am, in reply to "FORD FIESTA MISFIRE"

Hi Malcolm,
Think you should be looking elsewhere for your misfire !!

That "Gap" is normal ! the missing tooth in the crank signal is 90 degrees btdc, so "actual" tdc is as indicated in the attached picture.

Regards
Dave

You can trim a sheeps wool many times, but you can only fleece it once !

Re: FORD FIESTA MISFIRE

Posted by Malcolm Tripp on July 4, 2013, 12:59 pm, in reply to "Re: FORD FIESTA MISFIRE"
Edited by board administrator July 8, 2013, 2:07 pm

Thanks once again Dave, this was the only thing that did not check out in my mind but makes sense now !

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