Battery died, jeep won't idle after jump?!

Quazzimoto · 06-10-2011, 01:30 PM

I have a 97 GC 4.0, auto,with 225k. I left the interior lights on last night. So I go to jump it this morning and it just turns over, if I bump the throttle it fires up and dies of I hold the throttle in any position it runs fine. I held it at about 2k for a minute or so and let off, low and behold it dies. No check engine light yet but I didn't get much time to look at it I had to go to work. Anyone have any similar past experiences or some insight it would be greatly appreciated.

Also my display panel tells me bad coolant sensor although I replaced it last week.

jronald · 06-10-2011, 01:42 PM

Not that unusual. Chrysler builds a pretty crappy charging system. If the battery gets too low, the things will not idle. Its also NOT a great idea to charge a dead battery with the alternator. Yes people have done it for years, but then smoking has been around awhile too. Either drive the thing to charge the battery, or take it off and run it down to the Autovancerielly store for a free quick charge.
Then see what it does.

"The alternator generates all the power needed to fully charge the battery IF the alternator does not overheat and fail. A dead battery will draw a very high load and stress the alternator to its maximum output limits and so I suggest you don’t run the headlights or other high amp accessories for at least the first 45-50 minutes of driving (charging). It will take (for example) a 70 amp alternator 0.85 hours (51 minutes) to fully charge a dead 60 amp hour range battery. I don’t know what your battery amp hour rating is or what the output amp rating of your alternator is but I assume your battery and alternator are suitably mated and so 45 to 50 minutes of driving/charging will not overload the alternator output capabilities as long as you do not add more stress on the alternator by running the headlights or other high amp accessories during that time."

Ron

Quazzimoto · 06-10-2011, 01:55 PM

Cool thanks man. I have a battery charger so I'll charge it over night. Thanks again

biggoofy · 06-10-2011, 02:52 PM

Your user name is gay!!

06-10-2011, 01:42 PM	#2
jronald Seasoned Member Garage is empty, add now Join Date: Apr 2011 Location: Outside of RTP NC Posts: 430 My Photos 1993 Grand Cherokee Engine: V8 Transmission: 46RH Transfer Case: POS 249 Tires: Goodyear Wranglers	Not that unusual. Chrysler builds a pretty crappy charging system. If the battery gets too low, the things will not idle. Its also NOT a great idea to charge a dead battery with the alternator. Yes people have done it for years, but then smoking has been around awhile too. Either drive the thing to charge the battery, or take it off and run it down to the Autovancerielly store for a free quick charge. Then see what it does. "The alternator generates all the power needed to fully charge the battery IF the alternator does not overheat and fail. A dead battery will draw a very high load and stress the alternator to its maximum output limits and so I suggest you don’t run the headlights or other high amp accessories for at least the first 45-50 minutes of driving (charging). It will take (for example) a 70 amp alternator 0.85 hours (51 minutes) to fully charge a dead 60 amp hour range battery. I don’t know what your battery amp hour rating is or what the output amp rating of your alternator is but I assume your battery and alternator are suitably mated and so 45 to 50 minutes of driving/charging will not overload the alternator output capabilities as long as you do not add more stress on the alternator by running the headlights or other high amp accessories during that time." Ron Last edited by jronald; 06-10-2011 at 01:47 PM. Reason: Cut and paste

06-10-2011, 02:52 PM	#4
biggoofy Seasoned Member 1996 Jeep Grand Cherokee Join Date: Oct 2010 Location: Jville, NC / Troy, NC Posts: 457 My Photos Grand Cherokee Engine: 4.0 Transmission: 42re Transfer Case: 242 Front Axle: HP44 Rear Axle: 9" Tires: 35" Goodyear wrangler mtr'k Lift Specifications: 6" coils, front and rear ironman4x4fab long arms and track bar, Clayton subframe and belly skid Misc Accessories: Front and rear bumpers, Engo 10,000lb winch with syn line, internal cage	Your user name is gay!! __________________ I REFUSE TO TIP TOE THROUGH LIFE TO ARRIVE SAFELY AT DEATH!!! 96 ZJ hp44 / 9" on 35s 90 XJ on 33s

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06-10-2011, 01:55 PM	#3
Quazzimoto Seasoned Member Garage is empty, add now Join Date: Sep 2009 Posts: 269 My Photos Cherokee	Cool thanks man. I have a battery charger so I'll charge it over night. Thanks again

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