1999 Peugeot 406 1.8 turbo 8v
No 1 and 4 plugs are always black while the 2 and plugs always is black too and fuel in it....

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Collins
Driver
1 points

Problem added: Jan 10, 2021 (1 week ago)
The 1 and 4 plugs has black carbon in it always and the 2 and 3 plugs has also black carbon and unburned fuel in it mouth..
I've checked the coil and it's ok..

Car details
Car: Peugeot 406
Variant: 1.8 turbo 8v
Model Year: 1999
Replies and Fixes
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bustedknuckles
Legend
2,298 points

Jan 10, 2021 (1 week ago)
Tried replacing the plugs checking the leads,is the car running rough,may need a few bits and emissions check tune up
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whittingehame
Legend
16,732 points

Jan 10, 2021 (1 week ago)
Could be valve stems/ oil seals worn or engine wear , check compressions
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Collins
Driver
1 points

Jan 12, 2021 (1 week ago)
I found out that my head gasket between 2 and 3 plugs just melted...
So I changed it and everything came back to normal...
Thank you guys for the response..
Avatar
whittingehame
Legend
16,732 points

Jan 12, 2021 (1 week ago)
Thanks for updating the forum , glad you got it fixed .
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