Ford Fiesta ST
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#349225 - 07/09/11 06:50 AM Re: Backfire/Misfire problem when starting in morning [Re: STASON]
carloskev Offline


Registered: 23/05/08
Posts: 126
Anyone else got any ideas or am u going have to get it booked in with ford

Thanks

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#349226 - 07/09/11 02:27 PM Re: Backfire/Misfire problem when starting in morning [Re: carloskev]
Tez Offline


Registered: 03/01/09
Posts: 2509
Loc: Co, DURHAM
you might need to get it scanned to see if any fault codes are present, scanned a mates fiesta diesel the other day cos he said it wasnt running properly and air flow sensor showed up even though no lights were illuminated on the dash, a faulty tps sensor or ect sensor could cause these symptoms but so could a dirty air filter, vacuume leak at throttle body or inlet manifold, all sorts of things.
_________________________
Fiesta ST200, K&N Panel Filter otherwise standard for now.

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#349227 - 07/09/11 09:10 PM Re: Backfire/Misfire problem when starting in morning [Re: Tez]
carloskev Offline


Registered: 23/05/08
Posts: 126
Can only ford dealers do this? is it not worth doing changing fuel filter

thanks for all the replies

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#349228 - 07/09/11 09:34 PM Re: Backfire/Misfire problem when starting in morning [Re: carloskev]
STASON Offline


Registered: 05/01/11
Posts: 5720
Loc: UK, Essex
fuel filter effecting the car performance is very unlikely mate. the fuel filter will take years and years for it to get clogged up unless you have poured oil sugar or some other substance that isn't petrol.

You can take it to any garage, but I'd recommend the manufactures.

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#349229 - 08/09/11 11:10 AM Re: Backfire/Misfire problem when starting in morning [Re: STASON]
Scotty Offline
Porsche 997 Turbo & ST150

Registered: 27/02/04
Posts: 18100
Loc: Nuneaton, Warwickshire
If you are in the AA/RAC then call them out to run a diagnostic on your car... they will be able to tell you the fault code (if any) or try help with the issue.

I just had to change the Spark plugs and coil pack on Sarah's Zetec S for a similar thing.
_________________________

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#349230 - 10/09/11 08:44 AM Re: Backfire/Misfire problem when starting in morning [Re: Scotty]
carloskev Offline


Registered: 23/05/08
Posts: 126
thanks for all the advice, Im taking it into ford to do a diagnostic. Will update when I find the result

thanks

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#349231 - 19/09/11 03:20 PM Re: Backfire/Misfire problem when starting in morning [Re: Scotty]
carloskev Offline


Registered: 23/05/08
Posts: 126
Ive had it plugged in and had two faults. Oxgen sensor and it is reading an incorrect temperature, which is probably the backfiring in the morning.

I got it resetted this but im guessing the car will play up as soon as it goes cold. So does this mean the oxgen sensor needs replacing and what part controls the temperature? so the engine knows how much fuel to pump through?

Look forward to your advice

thanks

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#349232 - 19/09/11 08:26 PM Re: Backfire/Misfire problem when starting in morning [Re: carloskev]
Tez Offline


Registered: 03/01/09
Posts: 2509
Loc: Co, DURHAM
Do you know the actual fault codes ?
_________________________
Fiesta ST200, K&N Panel Filter otherwise standard for now.

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#349233 - 19/09/11 08:48 PM Re: Backfire/Misfire problem when starting in morning [Re: Burn4]
kinobeSTew Offline
Site Supporter

Registered: 23/01/11
Posts: 1616
Loc: Hindley, Lancashire, England
Quote:

Clean the throttle body ALSO





Indeed, I took mine off on Friday before the rolling road and it was a shiny smooth dark black mess inside. Unfortunately I didn't have any cleaner for it though so I just used a cloth. As I moved around it just made a horrible smudge that wouldn't clear and wasn't as smooth as before.

Car has ran crap since, rubbish idle. Going to take it off tomorrow and give it a good hard clean now i've got the right stuff.
_________________________
<center>
Click signature to see my Lil Red ST project blog</center>

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#349234 - 20/09/11 03:16 PM Re: Backfire/Misfire problem when starting in morning [Re: kinobeSTew]
carloskev Offline


Registered: 23/05/08
Posts: 126
Its the lambda sensor on the manifold that needs repalcing. It was also flagging up air temperature sensor. Cheapest is eurocarparts for £48. that about right?

also is it easy to do?

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#349235 - 20/09/11 06:27 PM Re: Backfire/Misfire problem when starting in morning [Re: carloskev]
Tez Offline


Registered: 03/01/09
Posts: 2509
Loc: Co, DURHAM
lambda sensor is easy enough to change if you can get under the car, not sure if its a TMAP sensor on the ST, (temperature and manifold absolute pressure sensor) it should be easy enough to change, should be on the inlet manifold.
_________________________
Fiesta ST200, K&N Panel Filter otherwise standard for now.

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#349236 - 24/09/11 09:24 PM Re: Backfire/Misfire problem when starting in morning [Re: Tez]
carloskev Offline


Registered: 23/05/08
Posts: 126
It's been changed and same problem. However, now its cutting out when its warm on tick over. Anychance I got a faulty one?

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#349237 - 25/09/11 10:34 PM Re: Backfire/Misfire problem when starting in morning [Re: carloskev]
STASON Offline


Registered: 05/01/11
Posts: 5720
Loc: UK, Essex
sounds like you haven't got the right sensors?

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#349238 - 26/09/11 09:10 AM Re: Backfire/Misfire problem when starting in morning [Re: STASON]
Tez Offline


Registered: 03/01/09
Posts: 2509
Loc: Co, DURHAM
sounds like the lambda sensor has been changed but not the other sensor.
_________________________
Fiesta ST200, K&N Panel Filter otherwise standard for now.

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#349239 - 27/09/11 07:06 AM Re: Backfire/Misfire problem when starting in morning [Re: Tez]
carloskev Offline


Registered: 23/05/08
Posts: 126
Ford seem to think the temperature sensor is not on the map sensor. so bit stuck. if any one knows where the air temperature is, please get in touch? also you do not think that the air temperature is the in car temperature sensor? you know what shows you on dash how hot it is outside.

because that stopped working a while ago, before I had problems with the car. If it is then the car is not flagging up any problems

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