I was told that 12000 psi is roughly the psi your suposed to be getting . im getting 15000 to 16000. Is this bad. or is12000 low. ???????

 

Well I told you the wrong unit of measure. I ment to say 12000 kPa which is 178psi. This is for a 2000 F4 which should be the same as 1999 F4. Have you tryed different fuel? Service manual states high compression is excessive carbon build up.