dimanche 18 mai 2014

Engine hard shake and multiple missfire codes

Hello community, I've been a fan for quite some time, I'd like in the beginning to thank all of the community for helping fix a lot of problems.this is my first post



Since a year, every time I start my car in the morning usually 15 Celsius the engine and the whole car start shaking. It's like the shake if u have 2+ bad coils. After the engine warm up a bit i turn off the car and turn it back on, and everything goes back to normal. Note, if I put a big of gas till rpm reaches 800-1000 it won't shake, otherwise it's playing between 300-500.

These symptoms only happen when I start the car for the first time during the day, obd codes are 3 random misfires every time, I changed 3 coils. I showed it to a mechanic he said that it's the pistons that are usually 24 and they need to be changed, he said they are under the coils, don't know what is he talking about, because tin my country they name parts differently

Would appreciate any help concerning my problem!



Btw it's and 2002 e46 325i with 170k miles on it





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