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Fiesta-Si.com • View topic - Hesitation/Lack of power at certain RPM
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pqx1alpha
PostPosted: Sun Sep 06, 2009 9:56 pm 
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Hi, I've got a 1.6 fiesta Si M reg and recently it's felt really down on power between (roughly) 3500rpm and 4500rpm it's noticable in every gear and it's worse on full throttle. Does anyone have any ideas? I'm going to have a proper look tomorrow and have a play with the the TPS?

EDIT: it's fine and feels normal at all other RPM and it idles fine.
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onslack
PostPosted: Sun Sep 06, 2009 10:17 pm 
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try cleaning your MAF :thumbsup:
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cs detailing
PostPosted: Sun Sep 13, 2009 9:23 pm 
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i would go with the maf too. althought worth checking and cleaning your plugs etc
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Drifter
PostPosted: Tue Oct 13, 2009 4:38 pm 
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Maf, maybe, but if you have a MAP sensor, check that out as well. Could also be an O2 sensor, 1st one.
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