Compression test 110 psi??

Hello, I have a 2007 tundra with 308000 miles on it. I had a cylinder 4 and cylinder 6 misfire. I changed out all the spark plugs and all the Ignition coils. Still had Misfires. I did a compression test on a cylinder 4,5 and 6. The compression was a 110 on every one of them! The specs call for a 145 to a 195. Question #1 : Do you think the compression tester I rented was faulty? The truck still feels like it still has good power. Would it be possible that all 4 cylinders would have a 110 psi? Or is it more likely that the rented compression tester was faulty? Question 2 : What else do you think it can be? Fyi: I also put dialect recent coil # 4 and #6. Fuel injector? Electrical problem? Thank you

 

A spread of compression is worse than uniformly low. So whether the compression is actually that low, a bad tester, or your methodology was off, I wouldn't be worried if they all read the same.

I'd also check the other bank and see how it compares.