I installed the spark plugs Bosch super f8dc4 today.
The car started running rough and while it was running I disconnected the plug from cam positioning sensor and also from idle stabilizer for a few seconds .
After about a minute or 2 the car started to run super smooth like a swiss watch.
It was running for about 5 minutes temperature 85C, I pressed the accelerator a bit but started very rough and from that moment on was getting worse and worse while idling and then it stalled.
I could not get it started again , it looks like it is flooded, probably tommorow will start again but rough.
The spark plugs that I removed were all black.
Thank you
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