Since I purchased my Jeep it has had a hard start issue. I have learned to live with it, no big deal. If I just try to start the Jeep right away, 90% of the time it will just crank and crank with no start. If I cycle the key on for a few seconds, back off, then try to start, it will start perfectly…that is until this weekend. I was out doing some light wheeling and I got up on top of some rocks for a good pic opportunity. I killed the Jeep to take pics and when I got back to the Jeep my cycling the key wouldn’t work. After cycling the key a few times I would get it to start but it would sputter and die after a couple of seconds. I finally got it started and drove home with no problems. Now it starts after cycling the key with no problems again. I can’t be breaking down like that on the trail so it’s time to fix it.
My gut feeling is that it’s the fuel pump. I hooked up a fuel pressure gauge to the fuel rail today and here are my results.
KOEO (First cycle) 2 psi
KOEO (2nd cycle) 12 psi
Engine started on 2nd cycle
Running at idle 48 psi
Under load (2k-2.5k RPM) 48 psi
Turn the engine off and the pressure immediately starts dropping. After 10 minutes I’m at less than 10 psi.
The pressure is definitely low with KOEO and it is leaking down too fast. Time for a new fuel pump, or any other suggestions first?
My gut feeling is that it’s the fuel pump. I hooked up a fuel pressure gauge to the fuel rail today and here are my results.
KOEO (First cycle) 2 psi
KOEO (2nd cycle) 12 psi
Engine started on 2nd cycle
Running at idle 48 psi
Under load (2k-2.5k RPM) 48 psi
Turn the engine off and the pressure immediately starts dropping. After 10 minutes I’m at less than 10 psi.
The pressure is definitely low with KOEO and it is leaking down too fast. Time for a new fuel pump, or any other suggestions first?