300zx electrical problem, good ptu and cas connections

[yoozef]

So i bought this 300zx to fix it up. Cylinders #5 and #6 aren't working. I tested the injectors and #5 is fried, so im guessing that's the problem on that cylinder. #6 is a little trickier. ECU does not throw any codes. I pulled the spark plug out and it wasn't firing. So i changed it out with one of the working ones. Still no spark. I changed the coil pack and it still no spark. So im thinking corroded connection, cleaned the connector. No spark. PTU works, because i swapped them with a known working unit. Cleaned the connections. No spark. I took the cas connector, didnt see any corrosion there. So i took my multimeter, turned the key to on position and this is what i got:Cylinder #2 middle pinCylinder #2 left pinCylinder #2 right pinCylinder #4 middle pinCylinder #4 left pinCylinder #4 right pinCylinder #6 middle pinCylinder #6 left pinCylinder #6 right pin



What would cause such a behavior? Thanks
Modified by yoozef at 3:39 PM 11/9/2008