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Cylinder 2 misfire cold start

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21 Nov 2023 19:44 #252279 by DrRobin
I doubt it’s the crank position sensor, a faulty one wouldn’t give a misfire on cylinder 2 only, it’s would be on different cylinders.

If it is only on cylinder 2 then it is going to be something specific to cylinder 2. You have changed plugs and coils, so an injector is the next thing, unless there is something more seriously wrong with cylinder 2.

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21 Nov 2023 20:22 #252281 by Phaeton
Swap the plug, injector & coilpack from No 2 with another cylinder & see if fault follows, if it does you're down to the 3 items, if it doesn't it could well be mechanical.

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21 Nov 2023 21:02 #252282 by facade
Do a compression test when cold and see if cylinder #2 is lower than the others.

A burnt exhaust valve will cause enough compression loss for a missfire at idle, but seem to get better when the engine is running at speed.

If it suddenly breaks, go back to the last thing that you did before it broke and start looking there :)

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28 Oct 2024 19:00 - 28 Oct 2024 19:26 #258080 by Dimitris
Hello again. Now that the temperature in the morning is near water freezing point the problem appears again. Compression test is ok. New spark plugs and coils. Swap the injectors with no difference. Compression is ok. When the engine gets hot , it runs just fine. Any idea by someone? Thanks
Last edit: 28 Oct 2024 19:26 by Dimitris.

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29 Oct 2024 04:20 #258084 by Lambert
Are the spark plugs correctly torqued and the plug leads correctly and firmly seated on the plugs

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29 Oct 2024 04:37 #258086 by Dimitris
Yes. I check it many many times

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