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Discussion Starter #1 (Edited)
Have been having problems with the "depolution system" on my 407 Coupe V6 Petrol.

Peugeot Diagnostics said 2 of the coils were on the way out.

Car is running rough and bogs down over 3k revs.

Have bought new coils and fitted the easy 3 at the front.

Whilst changing the coils I have had a look at the spark plugs and the gap seems to be way to wide.

Can anyone tell me the correct spark plug gap. From what info I have found I am thinking 1mm but the current setup is way over that

Plugs are free from oil, carbon deposits etc. I will be really hacked off if it turns out I only needed to gap the plugs. Peugeot will be getting a visit.

TRhe plugs are Bosch Platignum

The vehicle is an 07 and has only done 31k miles

:lol:
 

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bogs down

hi i have a 407 3L V6 that also bogs down over 3k revs and a message comes up "depolution system" what did you do to resolve this problem.

i also would like to replace the spark plugs

if you can give me any information regarding this it would be a big help
 
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