basically i took my car in to be remapped as it was running funny after having a new head and the bodies need re mapping as it now runs a standard head and its been struggling to fire we did a compression test and found all 4 cylinders were 130 what could be causing this as they are all the same

 

Timing maybe. What engine? Standard pistons?? Etc.

Matt

 

Oops just seen thread title!! Ha. Yeh suspect timing if it was after a head change.