I have a 08 BMW 4.8 (E70 with a N62.) The timing chain guide on the passenger side, in the middle of the intake and exausht cam, broke and I replaced it. While I had the valve covers off I replaced the valve stems, did new seals, spark plugs, and coil packs. Because the work was done with the motor in the car the eccentric shaft, and camshaft sensors took a beating. When I fired the car up after the repairs I got 8 codes: P1040 ( Virable Vale timing), 3 missfire codes 4, 6, 8 cylinders, and both cam shaft sensors B on both banks reading high. There is also metallic tick on both sides now as well. Even though I used an AGA knock off tool, I still pulled the cams ( it was a lot easier to complete the job.) I torqued the eccentric shaft and intake shaft to 20 nm on all of the bolts. I used the timing tool to check the timing on both timing chains 3 times, sping the motor 2 rotations each time. I still need to change the oil but was waiting to be done with all the work first.
With all that said I still cannot find a good source on the resistance on the mentioned above sensors to make sure they are working properly.
I feel that the eccentric shaft sensor is broke and is engaging the selenoid causing the issues.
The car almost idles normally when cold, but when warm, almost "lops" like a taller cam is in it like older V8 with a bigger cam.
Does anyone know of a good source to the resistance of the sensors, so I can test them with an Ohm meter or have any suggestions? Thanks in advance.
06-27-2018, 02:35 AM
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