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Author rough idle
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
User status: Offline
8th Oct 07 at 11:59   View User's Profile U2U Member Reply With Quote
Any one know what is causing it? Runs fine accelerates fine it just seems to run a bit lumpy on tickover thats all. Any one any suggestions??

Cheers
SAL
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Registered: 19th Dec 05
Location: Radlett, Hertfordshire
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8th Oct 07 at 12:00   View Garage View User's Profile U2U Member Reply With Quote
has the car been serviced recently ? if so AFM is quite a common problem on the early gsi's
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
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8th Oct 07 at 12:20   View User's Profile U2U Member Reply With Quote
I have no idea when it was serviced last Gonna go to my mates garage me thinks. Just seeing if any one had any ideas thats all.
deano87
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Registered: 21st Oct 06
Location: Bedfordshire Drives: Ford Fiesta
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8th Oct 07 at 12:25   View User's Profile U2U Member Reply With Quote
Might have a 12v engine in it. They have lumpy idles
gavin18787
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Registered: 22nd Feb 05
Location: Basildon, Essex
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8th Oct 07 at 12:35   View Garage View User's Profile U2U Member Reply With Quote
paperclip test it, see if its stored any fault codes recently

Drives supercharged Tec with torque
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
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8th Oct 07 at 12:39   View User's Profile U2U Member Reply With Quote
Paperclip test batters my head
Limecat
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Registered: 25th Jun 05
Location: The Internet
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8th Oct 07 at 13:45   View User's Profile U2U Member Reply With Quote
Whats it idling at?

If it is idling too low it will feel lumpy. You have a adjustment on a threaded stop on the throttlebody.
Sunz
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Registered: 12th Jan 07
Location: SE England
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8th Oct 07 at 14:30   View User's Profile U2U Member Reply With Quote
Mine was doing this.
Was on running on 3 cylinders but still felt fine other then idle.

Maybe, plugs, leads or coil pack even something like a crack in the cylinder head.
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
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8th Oct 07 at 14:30   View User's Profile U2U Member Reply With Quote
It is idleing at 750rpm. Is this right?

I hope it ain't a crack in the cylinder head

[Edited on 08-10-2007 by Iain M]
Sunz
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Registered: 12th Jan 07
Location: SE England
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8th Oct 07 at 14:39   View User's Profile U2U Member Reply With Quote
You would notice air or fluid leaking from the head.

750rpm sounds ABOUT correct my corsa idles spot on 800rpm.

Also maybe worth checking the air filter.
Iain M
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Registered: 18th Aug 05
Location: Wigan - Drives 272bhp corsa ZLET
User status: Offline
8th Oct 07 at 14:40   View User's Profile U2U Member Reply With Quote
Its got a modified standard box with pipercross panal filter.
Sunz
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Registered: 12th Jan 07
Location: SE England
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8th Oct 07 at 14:44   View User's Profile U2U Member Reply With Quote
does it affect idle at all like going up and down even a few rpm like 50-100.

You could check to see if its running on all the cylinders by pulling the ht leads off each cylinder one at a time to see if this affects it.

Obviously if there cylinder isen't running and you pull a lead off it wont cut out or affect it, should affect it otherwise.
gavin18787
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Registered: 22nd Feb 05
Location: Basildon, Essex
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8th Oct 07 at 17:09   View Garage View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Iain M
Paperclip test batters my head




I thought this too. Follow this guide and just open the fuse box and stick a paper clip in the correct connectors

Drives supercharged Tec with torque
Jake
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Registered: 24th Jan 05
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8th Oct 07 at 17:50   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Iain M
It is idleing at 750rpm. Is this right?

[Edited on 08-10-2007 by Iain M]


750-800 is about normal mate, mine idles around that. Service it anyway

 
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