2007 X3 N52 3.0si Idle Issues

[Jason Porter]

I keep getting a cylinder number 4 misfire code. Sometimes I get a MAF code and sometimes I get a Vanos intake code, but always cylinder 4 misfire. I have replaced plugs and coils and checked all of my ground wires. I have done a leak down test on cylinder for and got 3% leakage. Also switched #4&5 injectors, still cyl 4 misfire. Continuity is good on DME harness wires from unit to coil plug and from coil plug to ground. Idles like crap, runs fantastic.

I used to work at Pelican as a Porsche guy, but the BMW's are not completely in my wheelhouse.

[shogun]

moved to X3 forum