Ok, I did a search and just want to make sure I've got all the candidate problems before I commit myself to fixing this thing: 1990 Renix Limited XJ. 190K miles, beat to hell, but otherwise runs great. Dedicated hunting rig with some/very little street driving.
On the trail back in Feb., it randomly died out going downhill on a very bumpy fire road. Not like sputter die out, but instantly shut down, everything went off (gauges, radio, engine, etc.). Stopped jeep, turned key off and then on again and it turned over and we continued on. Did this twice on in the weekend hunting trip with maybe 50 off road miles or so total. Weather was between 30-60* F that weekend.
1. I checked the O2 sensor wires to see if they were frayed and shorting. Looked good and not anywhere near the driveshaft/u-joints. Did not test the sensors.
2. Battery cables are nasty. I am going to replace them this weekend. Basically look like rusty cables duct taped to the battery posts. Battery is a new Optima blue top.
Given that my rig completely shut down when this happened, I'm assuming that it's not a crankshaft/camshaft position sensor or other similar. I'm also not sure if a bad ground on the main electrical from the battery would cause this as well. Other than that, the jeep starts and runs like a champ. Any ideas?
On the trail back in Feb., it randomly died out going downhill on a very bumpy fire road. Not like sputter die out, but instantly shut down, everything went off (gauges, radio, engine, etc.). Stopped jeep, turned key off and then on again and it turned over and we continued on. Did this twice on in the weekend hunting trip with maybe 50 off road miles or so total. Weather was between 30-60* F that weekend.
1. I checked the O2 sensor wires to see if they were frayed and shorting. Looked good and not anywhere near the driveshaft/u-joints. Did not test the sensors.
2. Battery cables are nasty. I am going to replace them this weekend. Basically look like rusty cables duct taped to the battery posts. Battery is a new Optima blue top.
Given that my rig completely shut down when this happened, I'm assuming that it's not a crankshaft/camshaft position sensor or other similar. I'm also not sure if a bad ground on the main electrical from the battery would cause this as well. Other than that, the jeep starts and runs like a champ. Any ideas?