defconOne

Guys..I need ur help..
I was travelling aroung 120kph and my engine suddenly stall
No codes given..
Upon checking found 30amp mini fuse for asd burnt
Change new fuse and it burnt again when cranking..
Towed the vehicle and after about 1 hour..changed the fuse again
This time the fuse did not burn
But now the jeep won't start and no codes again..
There is fuel pressure but no spark..
What should I look for?cpk?cps?
Thx guys in advance..I m still out on the road figuring out.

tjwalker

Not likely a sensor. You most likely have an electrical short somewhere that is causing this.

stryker1228

Ya, like a wire that has rubbed trought its insulation and is grounding out.

grsmnky1

Multimeter and time. I doubt this is a plug and play problem. I seen a post where somebody suggested a compass to seekout the short due to the emf they cause but I just get a wiring diagram and start chasing the gremlins. I have also seen a lot of posts where the Crank sensor was the culprit but there were no blown fuses involved.

defconOne

Updates....
Changed the fuse and tried cranking..fuse did not burn...
I chamged the coil pack and walla...my jeep fired up...
Code 0351 showed up...other then tat..it is running ok
Will monitor it and still puzzled why the fuse blow...
Lucky tat I always carry spare electronic parts...
Cherokee parts are sacred here...
Thank you guys for the inputs..appreciate it..
Wish me luck to complete another 250km without any problems.

tiwvr1

I have seen shorted 02 sensor wire blow that fuse

defconOne

hi guys....
arrived home safe and sound.....
mini fuse 30a blown off once again along the way...
it happen if I travel at around 90kph when i hit a bump on the road...
well...what u guys mentioned about wire leak is true...
now i will have to hunt the culprit....
will do it in days to come...pretty tired and must be in the mode...he he
will update u guys further when i locate the culprit...
if u hv further opinion...feel free....
thank u guys for the help...appreciate it

stryker1228

Definitely sounds like a short circuit. Look for worn wire insulation.

grsmnky1

it might sound silly but check under your carpet on both the passenger and drivers side. Jeep unfortunately put a large wire loom there and it wears through under our weight. my lard *** smushed them so well they arc welded to the floor. there is a relay, at least on my jeep, (that controls something on the O2) on the passenger kick panel.

defconOne

okies guys....found the culprit....
the wires to the rear O2 sensor...
it rubbed against the shaft and 3 out of 4 wires were badly damaged...
taped it good and it is now in conduit and secured nicely in place...
thank you all for the enlightenment...appreciate
another happy cherokee