rob_engineer

My 2014 JK died while driving. Acted like it wasn't getting gas. Now it won't start. It cranks and sometimes sounds like it is starting, but won't actually stay running. I was assuming fuel pump related, but I see some posts talking about TPIM and also the crank position sensor. Anyone have advice on where I should start?

rob_engineer

I replaced the crank position sensor. No improvement. Barely starts, then dies.

Ghost JK

no codes? have you checked fuel pressure?

rob_engineer

No codes. I've done a lot of my own maintenance work, but never had an occasion to check fuel pressure on anything, but seems like something I should do. Was planning on replacing the cam sensors tomorrow. Trying to do inexpensive things first. I absolutely despise the dealer so that will be my last resort.

Ghost JK

Usually sensors will throw a code or pending code, I"m not sure if a lack of fuel will throw a lean code or not. I would throw a fuel pressure tester on the rail and check if it's within spec.

Dirt Hammer

For a quick check lay under the Jeep on the fuel tank side and have someone turn the key switch tot he on position. The fuel pump should run for around 5sec. doesn't replace a fuel pressure test but can tell you if the pump is working or not.

rob_engineer

Any good write ups on how to change the fuel pump on my 2014 jk? I put my code reader on it and no codes. It really sounds like it wants to start but is starved for fuel. It will kinda start for about 2-3 seconds after cranking for awhile, which tells me that electricity is probably getting to the pump. I swapped the pump relay with no improvement. Of course my gas tank is completely full! I assume the odds are a faulty pump or regulator on the pump.

rob_engineer

I've got to many things going on now to dedicate time to troubleshooting my Jeep problem, so I very reluctantly had it towed to an independent shop. I'll report back with the diagnosis.

rob_engineer

Cylinder 4 exhaust valve seems to be broken.