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Thread: afm or coil pack?

  1. #1
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    confused afm or coil pack?

    morning all i have 02 vectra 1.8 misfire heavy on idle,when it aventually starts,very lumpy running sounds a bit better when revved over 2k drives like its a three cylinder and does not pick up smoothly.i have three codes 1405,0403,0302,have read the later could be afm throwing things out ,which one is more likely before i attempt doin it.this started on a normal run orange engine light came on and been like it since , many thanks ,and happy new year to all .sorry for long post

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    Regular Member rich r's Avatar
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    With the 0302 indicating a misfire on cylinder 2 and nothing on the other cylinders, I'd be inclined to think coil pack first. The other codes relate to EGR and well not be related to the misfire.

    I had to replace mine (04 Vectra 1.8) a couple of weeks ago, with very similar symptoms, particularly when the engine was hot. You can get non-GM ones for around £40 with a year's warranty easily enough. Replace that (it's a 10 minute job), then clear the fault codes and see what happens. I reckon it's worth replacing the coil pack every 100,000 miles as a matter of course on the 1.8 litre engines.

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