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Power train issues

Nette80

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I have an 06 svZ twin cam have had power train issues for almost a month. Changed out coils, plugs, engine flush, have also cleaned out cam sensors and switched them over to see if error codes changed but they didn't, so changed out crank angle sensor.
Car was idling rough and dropping revs whilst driving but those issues are gone now, however power train light comes back on intermittently, but drives fine.
Timing chains are solid and there's no symptoms pointing to an issue.
Can anyone help me?
 

timmy201

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So what error codes have actually been coming up?
 

Nette80

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Misfire coil 1&3 and malfunction primary/secondary ignition coil a,c,e.
All points to left hand cam bank hence the crank angle replacement.
 

Nette80

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Cam sensors have been cleaned out and changed. Already eliminated that issue from possible problems...
 

MYVESSV8

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was just reading you cleaned and changed over not out, what was the fault code number
 

Nette80

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P0300, P0301, P0303, misfire coil 1 & 3
P0351, P0353, P0355, malfunction primary/secondary ignition coil a, c, e
 

MYVESSV8

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random misfire P0300
plug 1 misfire P0301
plug 3 misfire P0303
No1 ignition coil control circuit open P0351
No3 ignition coil control circuit open P0353
No5 ignition coil control circuit open P0355
check your connections and grounds/earths
you have replaced all the broken parts, you may have some corrosion or a poor connectio
 

Nette80

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Connections to coils are secure, can u tell me where the ground/earth wires are on this model?
 

MYVESSV8

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u have where the injector plugs are, the connections on the coils, usually disconnect and spray to clean up, the coil mounts often used as ground/earth
 
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