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Revs Dropping/stalling Problem


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#1 Ford Focus Schlagenhausen

Ford Focus Schlagenhausen

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Posted 06 December 2012 - 02:10 PM

hi, i have a ford focus 2001 1.8 petrol and i have been having a few issues with it for a while. To start with i had trouble starting, the engine would turn over but it wouldn't fire. I found that if i hold down the throttle while trying to start it would eventually fire and it would run fine. after a while i had issues where after starting, the engine would only keep running if i held the throttle down. from doing a bit of research i figured this was due to the IAC valve which i replaced (my cousin got me a new gasket and i got the valve from a breakers yard (i cleaned the valve with carb cleaner before i put it on)). this completely solved the starting problem but now when i am coming to a stop and i disengage the clutch the revs drop right down (to like 400 - 500 rpm or something), sometimes the revs just jump back up again and sometimes it just stalls (quite inconvenient when coming up to a roundabout).
could this be down to the IAC valve i got being bad? could i have created an air leak? or could it be something unrelated?

Thanks for reading

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#2 shaundonnelly

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Posted 06 December 2012 - 03:21 PM

I'm 99% sure the problem u are experiencing is caused by the speed sensor in the gearbox. I had the exact same problem in my 01 1.8 focus when everytime u press the clutch when driving along the speedo drops and the engine stalls and the starts again straight away. Don't think it's an expensive fix and u should def give it ago.

#3 Ford Focus Schlagenhausen

Ford Focus Schlagenhausen

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Posted 06 December 2012 - 03:44 PM

thanks for your reply.
with the speed sensor does that cause the speedo to drop out to zero?
if so i haven't noticed this (most of the time when coming to a stop i have 1 eye on the road and one on the rev meter so i can reengage the clutch if the revs drop too low to stop stalling) but i will certainly keep an eye on that

thanks again

#4 shaundonnelly

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Posted 06 December 2012 - 07:12 PM

Yea I'm almost sure it did. When mine used to do it I just had to start it again with the key and it drove for a while then done it again.


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