dalejones
Member
Registered: 9th Dec 08
Location: Swansea, Wales
User status: Offline
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just put a c20xe engine into my corsa and is idlein really lumpy..also it idles at 1k wen it should idle at 900rpm i was told by the boy i bought it off that wen he had it he fitted a fast road clutch and a lightened flywheel and it was wen he fitted the lightened flywheel it started to be lumpy..
just wonderin would that cause it to by lumpy and idle slightly higher? also its missin abit wen u giv it a quick rev it delays? ne ideas?
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Richardhhha
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Registered: 29th Sep 07
Location: Croydon, Greater London
User status: Offline
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He's talking crap, if its hesitating slightly when you rev it them there is something wrong with it. . As the flywheel is sposed to increase throttle responce by reducing the amount of un sprung weight the engine has to move to complete a revolation.. Yes a light weight flywheel can cause lumpy idle but thats only if its a really light weight one tho iirc.. Check the plugs and leads for any tracing, and if its a dizzy cap engine check for any moisture in it and also for cracks and corrosion on the routor arm.. Then its afm and cts checking time.
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dalejones
Member
Registered: 9th Dec 08
Location: Swansea, Wales
User status: Offline
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hmm yer il change the plugs and see how it goes then, i think the flywheel fitted only weighs 3k
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John
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Registered: 30th Jun 03
User status: Offline
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Unsprung weight is weight not supported by the suspension like wheels and brakes etc, not a flywheel 
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Warren G
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Registered: 14th May 06
Location: Kent
User status: Offline
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if the flywheel is that light it can cause lumpy idle
i think he meant mass
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Richardhhha
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Registered: 29th Sep 07
Location: Croydon, Greater London
User status: Offline
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weight mass same difference
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John
Member
Registered: 30th Jun 03
User status: Offline
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It's not unsprung weight or mass.
It's taking weight off a component attached to the engine, nothing to do with unsprung.
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dalejones
Member
Registered: 9th Dec 08
Location: Swansea, Wales
User status: Offline
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so its lumpy because the flywheel is so light then?? n e thing i can do to get it smother?
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dalejones
Member
Registered: 9th Dec 08
Location: Swansea, Wales
User status: Offline
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n e one?
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sand-eel
Member
Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
User status: Offline
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If its missing a bit its probably just a sensor is fucked.
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sand-eel
Member
Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
User status: Offline
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3 kilos for a flywheel is very light!
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Richardhhha
Member
Registered: 29th Sep 07
Location: Croydon, Greater London
User status: Offline
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that flywheel is the sort of thing sbd do as there super light flywheel... needs special ring gear and starter motor..
but as sand eel its more than likely a sensor is causing it to hesitate, but a super light flywheel will cause a lumpy idle
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