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  #16  
Old November 19th, 2017, 21:10
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notamos notamos is offline
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Re: Broke down in the back country while hunting (HELP)

Not sure on the spark. I need to get some troubleshooting advice. I spent 5-1/2 hours sitting on the side of the road until my wife was able to get a dolly to us. It's home now, will look at it tomorrow.
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  #17  
Old November 20th, 2017, 04:49
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Re: Broke down in the back country while hunting (HELP)

If you aren't getting any lights either then you have a loose battery wire or main ground. Probably ought to replace the terminals at the battery, clean and reseat the hots at the alternator and PDC, and the grounds at the fender, firewall, and engine head.
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  #18  
Old December 13th, 2017, 21:56
jlmxj49 jlmxj49 is offline
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Re: Broke down in the back country while hunting (HELP)

I had something similar happen to me this evening coming home from work. It cranked and ran fine to start. Started down the highway and it just cut off for a couple of seconds like you turned the key off, then cut back on. A few seconds later it did it again, then it cut off for a third time and that was it. I coasted into a Chevron and that was that. No check engine light, not sputter, nothing. Rode shotgun in a rollback to the house. It will turn over just fine but won't hit a lick. I first thought it might be a fuel pump but maybe it's not. I won't get a chance to check it out until Saturday but wanted to see if anyone has any ideas. Before this happened it seems like the engine has to turn over more than it use to before it will start. It has a little over 183,000 miles on it and had 133,000 when I bought it so I don't know if it has ever had a pump put in it. I have replaced the coil as it developed a misfire but that was quite a while back. I also had to replace the ignition switch because I was losing power to the stereo and a few other things. I've never replaced any sensors. Any suggestions?
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  #19  
Old December 15th, 2017, 05:09
dan1977p dan1977p is offline
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Re: Broke down in the back country while hunting (HELP)

I don't know the year of your XJ, but if it really is your fuel pump, you should check the ballast resistor on the front driver's side quarter panel inside area. Remove wires from either side of it and wire them together using a jumper if they aren't long enough to connect on their own.
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  #20  
Old December 15th, 2017, 07:18
jlmxj49 jlmxj49 is offline
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Re: Broke down in the back country while hunting (HELP)

It's a 2001 Sport.
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  #21  
Old December 15th, 2017, 07:52
burntkat burntkat is offline
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Re: Broke down in the back country while hunting (HELP)

Quote:
Originally Posted by Saudade View Post
There's no float bowl like with a carb, nor an accumulator. Once you cut the power to the pump the fuel pressure drops immediately. Remember your physics, liquids are essentially non compressible.
Except, no.

This is exactly how I cleared the pressure to the lines when I replaced my fuel pump a few months back. Pulled the fuse. Cranked the vehicle. It cranked and ran fine for about 20 seconds, then began to sputter as pressure dropped significantly below where the injection system needed it to be. Eventually (within 30 seconds) it died.

Turned the key, and it started back up and sputter, then died. Did this a few more times and finally it just spun over.
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  #22  
Old December 19th, 2017, 07:22
jlmxj49 jlmxj49 is offline
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Re: Broke down in the back country while hunting (HELP)

This past Saturday I checked a few things. I connected a fuel pressure tester to the port on the fuel rail to see if the pump was working. I have around 46 PSI just by turning the key on, and 49 PSI while running. Yes, it actually cranked and ran, at least long enough to do that then it killed out again. I got it started, then it died again after a few minutes. I started looking at the alternator because it acted funny the two days I drove it. Voltage meter would show 14 volts while driving down the road and at idle. Pull the headlight switch, turn the blower fan on, or both, and it would pull down to 12 volts. So, I put another battery on that was fully charged and it started. Put a test meter on it and the alternator was putting out 14.05 volts at idle. Pull the light switch and it would drop to a little over 12. Turn on something else and it would drop below 12. Increase the throttle and it would increase to 14 volts. The alternator was also making a moaning sound. So, I bought a reman alternator from O'Reilly's and swapped it out. I also put my battery back in, fully charged, and everything worked as it should. They tested the one I took off and it failed. So I think everything is fine and I just assumed since it wasn't charging like it should, it wasn't keeping the full 12 volts in the system for it to run. I didn't drive it yesterday, but I headed out to work this morning and 25 miles later it died again while cruising around 60 mph. No lights, not warning, just died and won't crank. It will turn over just fine but won't crank. I've also noticed something else. It's burning an unusual amount of gas. Almost 1/2 tank in 75 to 80 miles. Could this all be caused by a bad crankshaft position sensor?
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  #23  
Old December 19th, 2017, 18:24
cody4359 cody4359 is offline
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Broke down in the back country while hunting (HELP)

any exhaust leaks? I went from 10 and under to 15 mpg by replacing my cracked manifold and fixing a other leak

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  #24  
Old January 6th, 2018, 15:43
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notamos notamos is offline
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Re: Broke down in the back country while hunting (HELP)

Figured I'd update this with the fix. It was the coil.

When I rebuilt this engine (16k ago), I replaced every sensor/component with OEM parts except for the coil. I used a Napa Echlin (sp?) coil. All of my tests pointed toward it so I pulled it off and tested it. Failed both the primary and secondary tests.

New Mopar coil, started on the first crank.
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  #25  
Old January 8th, 2018, 10:00
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jeeperguy21 jeeperguy21 is offline
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Re: Broke down in the back country while hunting (HELP)

Yay! So nice to know you've fixed this and that your XJ isn't likely to leave you stranded again.
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