I have an e36 compact with 1.9 m43tu engine. I replaced the hose that goes from the crankcase to the funny little valve thing. Its the one at the back of the engine bay, think its the oil breather. It was soggy and torn so i replaced it with a fuel pipe.
Now the problem i have is when i start the car it nearly fails to start, so i have to give it some to get the revs up. Then on idle its very uneven and lumpy. When driving im getting backfiring and popping! And lots of it!
What could it be?