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Old 10-28-2012, 10:29 AM   #1
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TPS? Battery?

I have a '97 TJ 6cyl. I went out to start my jeep the other day and nothing, the battery was dead. Come to find out I needed a new one. A few days after I replaced the battery the engine would sputter or stall out when I throttled on it hard. Figuring it was the TPS, I went and purchased a new one and installed.
Nothing, same 'ol sh*t.
Any ideas as to what is going on? This didn't start until I got the new battery, which I purchased at Autozone (they) recommended it.

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Old 10-28-2012, 11:21 AM   #2
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Your battery has nothing to do with the stalling. A car will run off just the alternator. Battery is mostly used for starting and powering aux lights and such. How long was it sitting for? Batteries usually don't go dead over night. Could be bad fuel or not getting enough spark. How is the air filter? Could be a few things. Might just need a simple tune up with good gas.

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Old 10-28-2012, 11:32 AM   #3
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Quote:
Originally Posted by jksport12 View Post
Your battery has nothing to do with the stalling. A car will run off just the alternator. Battery is mostly used for starting and powering aux lights and such.
Not true with a TJ, its alternator runs off of and requires 12v from the battery, it is not "self-exciting" like all the older generators were and some other alternators are. If you disconnect a TJ's battery, the engine will run only until the magnetic field in the alternator dies in a minute or two max and then the engine will die. The battery in my wife's Grand Cherokee's died and I had to jump start it 6-8 times during the drive to the battery shop 3 miles away.

This is why a TJ can't be bump started if its battery is truly dead. It can only be bump (push) started if its battery still has enough juice left to power the alternator.
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Old 10-29-2012, 06:41 AM   #4
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Quote:
Originally Posted by jksport12
Your battery has nothing to do with the stalling. A car will run off just the alternator. Battery is mostly used for starting and powering aux lights and such. How long was it sitting for? Batteries usually don't go dead over night. Could be bad fuel or not getting enough spark. How is the air filter? Could be a few things. Might just need a simple tune up with good gas.
Well here's the weird thing. I just fired it up, drove 1/2 mile, cut it off for maybe 20 mins. Went back out to leave and no lights no anything. Had the battery checked and they couldn't even get a reading. New plugs, new filters, fresh gas.
Guess I'll just have to do some "trial and error" to figure this one out. I'll let you know what I come up with.

Thanks
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Old 10-29-2012, 09:14 AM   #5
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You have a short someplace that's draining the battery. Have you done any recent electrical adds. Look there first, then start looking for pinched wires and where wiring gets near the body. Maybe pulling fuses to try and isolate the circuit giving you the problem.
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Old 10-29-2012, 10:01 AM   #6
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I'd check your alternator anyway. I fortunately have a VERY strong battery and it let me drive. But I was getting no charging from the alternator - ie 0 volts. Replaced it this weekend (easy job btw), and now things are working great.

I had the issue of the check gauges light coming on.
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Old 10-29-2012, 03:35 PM   #7
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Originally Posted by sparky
You have a short someplace that's draining the battery. Have you done any recent electrical adds. Look there first, then start looking for pinched wires and where wiring gets near the body. Maybe pulling fuses to try and isolate the circuit giving you the problem.
It's been about a week now and the (new) battery is still good fires up every time. Besides the main issue here is the sputtering when I gas it hard.
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Old 10-30-2012, 10:42 AM   #8
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OK, but the way post #4 read pointed towards a battery drain.
Now it's starting to look like a slightly loose connection.

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