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 Flat spots in my jcw

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Supermotostar

Supermotostar

Location : High Wycombe
Join date : 2012-06-18
Posts : 10
Male

Flat spots in my jcw Vide
PostSubject: Flat spots in my jcw   Flat spots in my jcw Empty30th December 2012, 19:00

Ive recently got this problem with my 2004 jcw.
Every time I go to accelerate between 1500 and 3000 rpm I get flat spots and then it clears until I get above 3000.
Could spark plugs have this effect?
If any can shed any light I would be very grateful
Thanks
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AM_AUTOS

AM_AUTOS

Location : United Kingdom
Member Number - SnM : 786
Join date : 2012-04-17
Posts : 2169
Male

Flat spots in my jcw Vide
PostSubject: Re: Flat spots in my jcw   Flat spots in my jcw Empty30th December 2012, 19:07

Check your spark plugs, oil and filter

Is your exhaust standard?
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bruce62
Club Endorser 4
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bruce62

Location : sunbury
Member Number - SnM : 62
Join date : 2010-01-31
Posts : 1607
Male

Flat spots in my jcw Vide
PostSubject: Re: Flat spots in my jcw   Flat spots in my jcw Empty30th December 2012, 19:33

A common fault with this happening is the bypass valve ( weak spring on valve flap ) . It's a job you can do yourself and when I changed my bypass valve a year ago when i had this problem I think the part was approx £60 .

Might be worth changing the plugs first as a cheaper fix if its just a plug breaking down .
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NeilAndHisMini
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NeilAndHisMini

Location : Angmering, West Sussex
Member Number - SnM : 071
Join date : 2010-02-08
Posts : 12753
Male

Flat spots in my jcw Vide
PostSubject: Re: Flat spots in my jcw   Flat spots in my jcw Empty30th December 2012, 21:32

Have been getting the same problem on my 2006 JCW recently.

Had the bypass valve replaced but that didn't fix it, think it will be spark plugs next.
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Flat spots in my jcw Vide
PostSubject: Re: Flat spots in my jcw   Flat spots in my jcw Empty

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Flat spots in my jcw

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