2009 rx350. Both vsc and check engine light flashing. Engine vibration on gas.
All 3 lights came on. Traction, vsc and CEL. First it was VSC flashing only. Took the car to my indy shop, was told Cylinder 4 misfire. I changed the ignition coil. After a couple of weeks, vsc flashed again. This time it was cylinder 3. So I just went ahead and changed all remaining 5 coils, and changed all 6 plugs since we were taking the back off anyways. Couple weeks go by, then vsc started flashing again. Its said cylinder 3 again. Mechanic checked cylinder 3, and indicated that it was not receiving any power and that is the reason for the code. He advised to changed the computer. I did. 2 days later VSC flashes again. Now code says cylinder 4 misfire. This happened yesterday. But occasionally VSC and CEL both flashed today. When this happens, car loses power and starts to vibrate whenever I give gas. This can happen while I am on the freeway or a side street. So I had to stop. Turn car off and restart. When I did that, the Engline light stopped flashing, and only VSC did. But I was able to drive the car and bring it home. Can anyone give me any idea as to what the problem might be? (I have not been to the dealer yet)

