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Home > Help Needed / General Tech Chat > misfireing on boost

sauber 200

421 Posts
Member #: 245
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9th Jun, 2004 at 08:11:50pm

just rebuilt carb,new air filter,plugs,oil.
starts fine.when car comes onto boost at high revs starts misfireing and cuts out,could it still be overfueling?

giallofly

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The Stig..

Newport Pagnell

9th Jun, 2004 at 08:14:17pm

Could be, ignition packs often break down at higher ends of the rev range even though they tick over fine.

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mini-marauder

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265 Posts
Member #: 68
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Coventry

9th Jun, 2004 at 08:25:58pm

NKG Plugs???

ive had problems with these before misfiring at high revs.

only found it when i checked fueling with a colourtune and happend to pick the right one!!

Ross.

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BoostedMini

10 Posts
Member #: 291
Member

10th Jun, 2004 at 02:38:34pm

Check your fuel pressure. Sounds like the regulator is not working with boost.. AT least this was the problem on my Turbo Buick running 26lbs of boost....

Steve Waters
U.S.A.

turbodave16v
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SouthPark, Colorado

10th Jun, 2004 at 03:01:34pm

I suspect fuel.
Check the rubber balance pipe isn't split, and that the pipe just forward of the fuel inlet pipe is blocked off and the hose intact

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b12

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826 Posts
Member #: 247
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Kent/Surrey Borders

10th Jun, 2004 at 04:28:20pm

I blocked my balance pipe off and it cured a lot of my problems

TurboLessTosser
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