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Join Date: Aug 2017
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03 955 Turbo Bad missfire

Hi guys,

Hoping to get some advice on this.

Have recently purchased a 03 955 turbo which is running very rough at idle and on hesitates when accelerating.

Codes read only state multiple misfire on cylinder 5,6 & 8.

I've bought replacement coils and already changed the plugs, new plugs made a slight improvement but not 100%. I'm waiting for the coils to arrive from Pelican parts, however I was thinking shouldn't the codes read that there is a bad coil if that were the case?

I was thinking about the possibility of the timing being out or a scorer cylinder as a potential possibility also. Anyone have any thoughts?

Thanks!
Old 08-09-2017, 11:56 PM
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Most likely the coils.
If you have a scored cylinder, the spark plug would be very fouled and there would also be a loud tick from that cylinder.
Less likely but also possible could be bad gas or sticky/dirty injectors
Old 08-11-2017, 09:22 AM
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Quote:
Originally Posted by jrbennett View Post
Most likely the coils.
If you have a scored cylinder, the spark plug would be very fouled and there would also be a loud tick from that cylinder.
Less likely but also possible could be bad gas or sticky/dirty injectors


Thanks for your reply, I swapped out the plugs already and the old plugs didn't show anything out of the ordinary.

No loud ticking also, I'm awaiting the parts and will see if that fixes the problem
Old 08-11-2017, 02:45 PM
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