I'll try and keep story short:
Jeep is 97 GC 4.0 I 6 engine
I've had it about a year, 125,000 on clock
Since I have owned it, it always took 2 turns of the key to start, I would turn it, wait a few seconds then turn again and it would fir right up.
The last 2 months it began to stall, then not start.
So i gave it tune up, new plugs wires rotor cap and it was good for a few days.
Then began stalling again, but always starts up almost right away. Also has not had problems starting from cold since tune up.
The battery and alternator have both been tested and are in good shape.
I tested the fuel pressure from a rent a tester auto-zone, what that showed me was when I first turn the key the fuel pressure gets primed fro 0 to about 15 PSI, the second turn starts the car and puts it in spec at around 50. That explained the odd starting it has had since I got the car one year ago..
After shutting down the fuel pressure drops quickly to about 15 , then a few minutes later goes to 0.
I changed the camshaft sensor ( part that is under distributor rotor ) , and again was much improved for a few days. When it began stalling again , it stalls then quickly restarts , sometimes on its' own ( which to me felt almost like some type of electrical ground loss ) Would a fuel pump do that?
Then it began again yesterday. I realized I may need to change the crankshaft position sensor. When I started the car and moved the wire near he wiring harness the CKS plugs into I could get the car to stall, so I assume the CKS needs to be changed. I also noticed that the sensor wire was under a lot of tension so I rerouted it ( but now it is close to the engine block and will get hot so I protected it with a piece of fuel line) .
Any ideas if the fuel pump is the culprit, or some othe electrical gremlin?
Jeep is 97 GC 4.0 I 6 engine
I've had it about a year, 125,000 on clock
Since I have owned it, it always took 2 turns of the key to start, I would turn it, wait a few seconds then turn again and it would fir right up.
The last 2 months it began to stall, then not start.
So i gave it tune up, new plugs wires rotor cap and it was good for a few days.
Then began stalling again, but always starts up almost right away. Also has not had problems starting from cold since tune up.
The battery and alternator have both been tested and are in good shape.
I tested the fuel pressure from a rent a tester auto-zone, what that showed me was when I first turn the key the fuel pressure gets primed fro 0 to about 15 PSI, the second turn starts the car and puts it in spec at around 50. That explained the odd starting it has had since I got the car one year ago..
After shutting down the fuel pressure drops quickly to about 15 , then a few minutes later goes to 0.
I changed the camshaft sensor ( part that is under distributor rotor ) , and again was much improved for a few days. When it began stalling again , it stalls then quickly restarts , sometimes on its' own ( which to me felt almost like some type of electrical ground loss ) Would a fuel pump do that?
Then it began again yesterday. I realized I may need to change the crankshaft position sensor. When I started the car and moved the wire near he wiring harness the CKS plugs into I could get the car to stall, so I assume the CKS needs to be changed. I also noticed that the sensor wire was under a lot of tension so I rerouted it ( but now it is close to the engine block and will get hot so I protected it with a piece of fuel line) .
Any ideas if the fuel pump is the culprit, or some othe electrical gremlin?