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Flat Spot @4000rpm

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Old 14 November 2003, 10:42 AM
  #1  
Andrewj
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Help! MY99 unmodded Turbo.

Just spent over £700 on a 60k service, including cambelt change and two new front discs. Main dealer thought that this would cure my flat spot, but mentioned possibly having to replace the MAF sensor if the problem is still there.

Drove home last night to find that it is. I can accelerate through it (delivery of power is only slightly hesitant between 4 and 4.5k revs), but you don't spend this money on a performance car of this kind, and expect a flat spot of any sort!!

Any ideas on likely cost of replacing the MAF?

I'm NOT happy...I may soon be an ex-scoob owner at this rate.

Thanks to one and all.
Old 14 November 2003, 10:48 AM
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Riftzone
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there's an post by me this morning which links to a post which you would find interesting I'm sure - 'how many my99 owners have cured hesitation by switching to optimax'
Old 14 November 2003, 10:48 AM
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Brun
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Take a chill pill and score a new maf for £75
Old 14 November 2003, 11:17 AM
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Blobster
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Similar prob on an MY99 was cured by dealer changing a faulty "pressure sensor". Whatever one of those is?

About 1k miles further and the o2 sensor was changed.

Et voila. No more flat spot, hesitation or uneven idle.

Hope this helps.

Blobster
Old 14 November 2003, 01:41 PM
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bits'n'pieces
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wastegate solenoid probably has a vacuum leak...
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