guys i have a ongoing problem that i cant seem to get fixed. i bought my G in Miami and shipped it overseas to the islands. VDC, SLIP and CEL came on a few weeks back and i ended up changing out both camshaft sensors on the car. Now the car seems to have loss some power. The RPM gauge and MPH are not in sync. RPM moves extremely slow. Throttle has been checked. engines serviced. plugs and coils changed. Mechanic cant seem to figure it out.

Not sure if timing chain tensioner has gone back. The engine is not throwing any codes and the timing chain is not making any noise.