[Ryanc2393]

Hey what's up guys? Randomly these past 2 weeks the truck has been cranking a few extra seconds before firing, occasionally I'll have to turn the key to off and go to start again which it'll fire up. Once I get her started I had no problems throughout the day. Well I went to do an oil change, clean a corroded positive terminal and try to look deeper into this issue yesterday when out of the blue I couldn't get it to fire. Truck cranks and cranks to no avail, I redid the positive terminal connector with a new one and anti corrosive spray and tried firing again but nothing.
100k 4.0 I rarely ever drive it anymore besides the weekends and want to tackle this issue asap if anyone has any ideas?
Thanks!

 

[Clint]

No check engine light? Usually it will be on.
Two common causes are crank positioning sensor or cam positioning sensor.

Clint

 

[Ryanc2393]

Nope no check engine light and have never had one

 

[Cusser]

Next time it won't start - that's when you need to troubleshoot whether your RUN circuit of your ignition switch is working, you already posted that the START circuit is working. The run circuit once you release the key is different contacts than the run circuit while in the start position.

 

[Ryanc2393]

Next time it won't start - that's when you need to troubleshoot whether your RUN circuit of your ignition switch is working, you already posted that the START circuit is working. The run circuit once you release the key is different contacts than the run circuit while in the start position.

Well now I'm getting no fire at all just cranks

 

[Willy88]

Had the same thing happen to my jeep liberty. Ended up being a fuel pump.

 

[Ryanc2393]

I hear the fuel pump priming. Went to hit the starter and try to fire it up all clicking now. Battery was on the fritz so planned on replacing that anyway

 

[Dark Night 18]

Exact same problem on my 06. It was the crank position sensor. I'll almost guarantee it.

 

[Ryanc2393]

Well I got a new battery and sure as hell she fired right up lol

 

[Ryanc2393]

New battery seems to have solved the problem. Two days now and she's firing right up immediately