vauxall astra 1.6 LS 2003 - misfire

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Sat 19 Mar 2016 16:00
vauxall astra 1.6 LS 2003 - misfire - rogers52

Hi,can anyone come up with answer to misfire on number four cylinder,no sign of mayo in rocker box or water system,done usual things cleaned throttle body,changed plugs, coil pack, cleaned egr but still same, car does not boil, goes ok on higher revs but goes back to misfire as soon as revs come down,many thanks

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Sat 19 Mar 2016 17:43
vauxall astra 1.6 LS 2003 - misfire - elekie&a/c doctor

have you done a compression test?

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Sat 19 Mar 2016 18:58
vauxall astra 1.6 LS 2003 - misfire - rogers52

Yes all fine

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Sat 19 Mar 2016 20:20
vauxall astra 1.6 LS 2003 - misfire - elekie&a/c doctor

Is this an 8 or 16 valve engine?

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Sat 19 Mar 2016 20:56
vauxall astra 1.6 LS 2003 - misfire - rogers52

16 valve, 92,000 miles

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Sun 20 Mar 2016 09:41
vauxall astra 1.6 LS 2003 - misfire - Simon

I'd try another coil pack if I was you. I've had a similar fault with a 1.4 16v Astra, it ran fine at a reasonable rpm but stuttered from idle and misfired upon pressing the throttle. A new coil pack fixed it.

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