2000 Ranger with a miss and check engine light showing a misfire in cylinders five and six. Here's the compression test. I know the numbers are not good. Should I just do a motor swap or dig into this one and see what's going on?

1 75
2. 110
3. 90
4. 100
5. 30
6. 60

 

According to the Chilton manual the lowest reading cylinder must be within 15 psi of the highest reading. You need a compression of at least 100psi on each cylinder.
With compression that low, it might be best to do an engine swap. How many mile are on the motor?

 

The post was made 944 days ago and the OP hasn't been around for over 2 years.