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Author corsa b 1,6 sport misfire
tonydeary
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Registered: 16th Sep 14
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17th Sep 14 at 19:37   View User's Profile U2U Member Reply With Quote
hi I need help
corsa b 1.6 sport misfire engine x16xe
changed coil pack ht leads and plugs runs on 3 cylinder's under 4500rpm anything above 4500rpm no problems really responsive any ideas PLEASE
--ToM--
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Registered: 23rd Nov 07
Location: Wirral
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17th Sep 14 at 20:29   View User's Profile U2U Member Reply With Quote
Injector
tonydeary
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17th Sep 14 at 20:40   View User's Profile U2U Member Reply With Quote
oh forgot to mention mechanic said no compression in cylinder 4, if that was the case how come it runs fine above 4500rpm
Tiger
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Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
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18th Sep 14 at 18:12   View User's Profile U2U Member Reply With Quote
MAS - had same problem on my old GSi, was running a k&n filter and it had broke one filament in the sensor, try unplugging it, you'll get a fault light on dash but see if it clears.
Generation
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Registered: 7th Jul 09
Location: Essex
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18th Sep 14 at 18:35   View User's Profile U2U Member Reply With Quote
They use map sensors? No MAS?
Brett
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Registered: 16th Dec 02
Location: Manchester
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18th Sep 14 at 18:37   View Garage View User's Profile U2U Member Reply With Quote
Twice in one week Generation has had this opportunity
Tiger
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Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
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18th Sep 14 at 18:48   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Generation
They use map sensors? No MAS?


Mine was an L plate, sure it had Mass Air Sensor?
Generation
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Registered: 7th Jul 09
Location: Essex
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18th Sep 14 at 19:58   View User's Profile U2U Member Reply With Quote
His is the later engine x16xe
Ian
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Registered: 28th Aug 99
Location: Liverpool
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18th Sep 14 at 23:13   View Garage View User's Profile U2U Member Reply With Quote
quote:
Originally posted by tonydeary
oh forgot to mention mechanic said no compression in cylinder 4, if that was the case how come it runs fine above 4500rpm


No compression or low compression?

Because if its leaky it still might ignite up the rev range. I wouldn't say no problems up there, just that you can't distinguish them from a normal high idle. I would hazard a guess its down on power in total.

Are you doubting his diagnosis? Might be worth re-running the tests and seeing what comes up. But if you have poor compression then there is your problem right there - HG, valve seats or piston rings. All of which is consistent with where you're up to changing things.

 
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