The jeep has not been running so smooth lately so I wanted to check some things out. First I checked the fuel pressure.
At the rail. When I turned the key on it popped up to 39 psi and very slowly started to go down. Dropped to about 30 after a couple of minutes.
When I started it, cold btw, it idles between 62 and 64 PSI.
Does that sound pretty normal? Everything I read says the pressure at idle should be way lower.
I also got codes 14 map sensor and 21 oxygen sensor...odd that they both popped up at the same time.