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Saxo Engine/Performance If you're interested in tuning Saxo engines, or if you need to know something which is engine related... this is the place for you.

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Old 29th July 2013, 14:50   #1
tubzy
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Angry missfire underload

Hi my 2002 vtr has got strange missfire when car gets warm and I try and accelerate I've fully serviced it and put a new coil pack on but its still happening. It isn't as bad but it's still playing up any help please can't think of what else it could be
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Old 29th July 2013, 16:50   #2
Martnos
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It could be an injector on its way out when or other fuel related stuff like the pump or filter causing under fueling when under load
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Old 29th July 2013, 18:07   #3
jeffchiz
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my punto does the same thing, its got a slight misfire on idle, but you only notice it when you put your foot down in low revs, it hesitates/judders until the revs have built up and then it fine, or you just drop it down a gear so your putting less load on the engine, cant wait to find the cause of it, its doing my tits in.
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Old 29th July 2013, 18:42   #4
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Happend in my old 1.1 changed the plugs and the leads.
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Old 29th July 2013, 18:57   #5
tubzy
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Pluged it in to one of works computers and is says intake pressure sensor mechanics told me that problem means map sensor so we cleared code and was fine for bout 10 mins then started again so gonna replace it tomorrow and see how it goes
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Old 30th July 2013, 20:07   #6
tubzy
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Right I've put new map sensor on then car would start then cut out and wouldn't rev so put old one back on it runs so been advised to clean idle control valve out and take the new sensor back lol getting abit missed off with it now any more ideas people ????
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