Problem with ignition coil or electronic board. Need help here...

[giub]

I Am driving a 318i 2.0 e46. In April I changed 4 pcs of new ignition coil and spark plugs.Last week I felt the engine jerking when accelerating. If turn off engine and restart again, the jerking will disappear. This will happen mostly after 1-2 hours of stopping the engine. So i Went to diagnose and found 2 ignition coil misfiring. The question is, I thought ignition coil can last longer that this? The boss of the workshop FOC change a used ignition coil. Testing is ok at the workshop. The boss told me that if it misfired (jerk) again, it will be the electronic board problem. Now after the engine cooled down I restart again, the jerking comes back. Is it possible that the electronic board got problem? How much will it cost? Need help here

 

[giub]

Dear sifus, need some help on this issue .......

 

[xcrave]

This had been somewhat solved before... If im not mistaken an advice i got from a Mech+Facts found online... There is a "Dry Solder" problem to the DME/Engine Computer wiring/board ... this in turn gave random problems to acceleration and idle... its connected to the MAF system too... so thats where the problem lies...

This i need Sifu verification as well... cause never had personal experience

 

[Herbert]

Normally when 2 ignition coils failed, the other remaining coils will follow. check the other 2 remaining coils. Don't think it is the "electronic board" failure. Does your mechanic has a diagnostic scanner? If he doesn't have one, time for you find any workshop.

 

[giub]

He got the diagnostic scanner , that's how we found out 2 ignition coiled died off. But I just changed all 4 in April 2011....

 

[giub]

This had been somewhat solved before... If im not mistaken an advice i got from a Mech+Facts found online... There is a "Dry Solder" problem to the DME/Engine Computer wiring/board ... this in turn gave random problems to acceleration and idle... its connected to the MAF system too... so thats where the problem lies...

This i need Sifu verification as well... cause never had personal experience

Thanks man....good sharing

 

[giub]

For sharing with all club members:
At first the diagnostic scanner found 2 erros of misfiring at th iginition coil. My problem solved when one of the spark plug found misfiring. After in depth checking, it is found that the fuel injector is leaking oil. After replacing a used fuel injector, problem solved. Total cost is rm690.

Thank you for members who assist me when this problem is troubling me.

 

[Herbert]

Giub,

Good to hear that finally the problem is resolved. Do continue to participate in the forum.

Cheers

 

[polaris78]

Hi sifus, I m driving e46 330i & also facing same problem. Car vibration was appearing sometime, when it happened for sure felt like very less power when accelerate. Check with Diagnostic scanner & found 1 pcs ignition coil misfiring, satisfied after changed 6 pcs of new ignition & new spark plugs. 2nd day while driving suddenly same problem appear again , engine sound like 'Subaru' & felt vibration when stop my car & during accelerate. It was back to normal when on my way to workshop, foreman checked with scanner but showed everything is normal .... this time 'jia lat liao' ... :`( ...... help pls .... :`(