It doesn't want 2 Pickup when u start the engine.

THEMBALEON

MEMBER
1998 BMW 325I

I have BMW 325i dolphin, it doesn't spark on 2, 3, 4 and 5. Only 1 and 6, and it alsobackfires at the exhost, I don't knw what could be the problem but I think its the sensor, could I be right, I the injectors are workng well and also changed the petrol pump and filter.

1 Reply

KNOWLEDGE IS POWER

MECHANIC
1,136 POSTS

If this car has coil on plug then each plug is commanded on by the ecm or a injector control module. The ecm will have to see crank and cam sensors to know what cylinder to fire. Also if you can switch known good coils 1 or 6 with dead ones. If the dead cylinders come to life and vice versa then you have a bad coil. If not you'll need to check those sensors. If you cant read a data stream on a diag computer then simply unplug them and check the wires. Look for breaks or rubs in all these wires and make sure theyre all plugged in completely, coils too