nujeepguy

went to 80, later after a few restarts back to normal.
i guess the gages are computer driven so this is ? sending unit, wiring,comp???
all other gages were/are ok no change from normal.

4x4jeepmanthing

my bet is sending unit and unfortunately i will say go to the stealership. ive gotten 3 aftermarket that work for a short time then back to the antics but the oem has been rock solid an reads noticeably better.

Ralph77

Mine in my '00 all of sudden pegged at 80 lbs too. I just replaced it immediately with a Napa one. Despite what everybody says about aftermarket ones. ECH OP6185. Guess it has been close to a couple years ago now. I would check wiring and the connection first though just cause it did start reading normal again. I never gave mine a chance to do that. Not wallet friendly to just throw parts at a vehicle but worked out for me. Forgot to mention pretty sure that part # is for '99 and up. Not sure what you are dealing with.

salad

On all of the model year XJs the oil pressure works gauge the same way. A basic analog sending unit goes straight into the dash, no computer. The only exception is if you have idiot lights, the unit will just be a switch.

Check the wiring first. If the sending unit is leaking oil it's definitely toast. You'll find it above the oil filter.

nujeepguy

at first it scared me,then i figured it was the sender or a connection. but when it goes back i wonder whats next?
ill just let it go since its been great,40-50 and i dont see it going bad.

thanks guys

nujeepguy

i looked at the dash connector info posted here and it did not show direct wires to the gages. all driven by 2 data wires from computer?? i cant findthat right now,,its from svc manual.
i tried to unplug it but cant figure the conn. i usually break the tabs off so i quit.
its back to normal

salad

What year is your XJ?

Returning back to normal is odd. Is the wiring covered in oil? Chafed anywhere?

4x4jeepmanthing

the reason ive said get the oem is because the chain store brands worked for me for a while but when they faulted they would jump between workingish to diving then back to kind of working at random times. idk if this applies for u but its been years working very well now for me.

the last time i replaced the sensor the cheap one had leaked oil on to the connections, have you pulled the plug apart and inspected?

nujeepguy

its a 2000. yes wires oily.
driving 3 months while fixing stuff,the only thing i never had trouble with is the dash panel gages till sat!
i did nothing but restart twice.
id like to unplug the sensor but dont know how, i break connectors learning how they unhook!!
after football im pulling the starter.
btw im adding a pushbutton to bypass the start relay and put 12v direct to starter. no more screwdriver jumping!!

also, when it cranks it really does, very strong,ignition or jumper,,,same

salad

I don't remember how the connector releases. I wouldn't be surprised if it was too brittle anyway, I have that luck with most engine bay connectors. Anyway its an analog gauge, no computer or data at all. A high reading is indicative of a short and suggests the sending unit is dead or there's damage to the harness. I guess if it comes up again you can deal with it. It won't affect anything.

What's wrong with your starting circuit?

nujeepguy

figured it without breaking, slide red tab and wiggle it off.
ran engine,oil read zero so i dont know why it went to 80.
three wires to sender ,never saw that before?


oh starter was replaced with a rebuilt. it doesnt crank always. the relay clicks but no crank sometime. jump hot wire to small start wire and it usually will pull in the solenoid and it starts,unpredictable

check the thread "check guages,cause" for connector info. it shows all wires and 2 data lines. no gages run direct. data lines must get decoded in the dash to drive the gages.

salad

Zero PSI showing with the unit disconnected is normal.

Sounds like you got a bum rebuild if the solenoid is dead. Definitely need that - I thought you meant you had a failed NSS or bad relay or fuse.

nujeepguy

check guages? cause??

shows connectors

Basslicks

Dude.... no. First of all, that's dangerous. Second of all, why not just fix the problem correctly instead of doing a half-*** modification that could burn your Jeep to the ground? That relay is there for a reason.

salad

My apologies, I checked the 2000 FSM, it does indeed go through the PCM.