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Old 11-29-2011, 10:58 AM   #1
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Cold starts slow in the mornings

Hey guys, I have read over a few cold start threads for a yj but cant seem to find one like mine.

94 2.5L

Recently, when i try to start the jeep in the mornings when it is below 40F the jeep acts like it doesnt want to turn over. but it DOES turn over. i have yet to be stranded and it always starts up, but when its cold it turns over VERY slowly, maybe once every couple seconds... then slowly speeds up frequency and starts up. i can live with this, but every time this happens it resets my radio and sometimes the check engine light comes on until the engine warms and i turn it off and back on.

i can live with the radio resetting all the time, but am afraid there may be an electrical problem. its like when its cold the ignition uses so much battery power that it takes power going to radio and resets to default.

also as it gets colder out im afraid one day it will just refuse to turn over...

does this sound familiar to anyone?
'98 4.0 manual, 1.75" coil spacers, on 31" dicks
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Old 11-29-2011, 11:06 AM   #2
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Might be a battery issue. You could need a new battery.

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Old 11-29-2011, 11:10 AM   #3
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when you said the radio reset, that shows your voltage dropped way to low. x2 on the battery needing replacement if it is older that 4-5 years. If its fairly new, then you def. need to clean the terminal connections, sand 'em rough and tighten 'em back down for the most surface to surface contact.

Based on your symptoms, I'd say go after the bat.. You can also have it tested at an auto parts store. They'll do a real world load test on it for you. Some can show 12-13v but as soon as you try to fire up it will not work good. Most of the time it is one of the multiple cells in the battery that either went dry or the water and acid seperated.

Another key sign of a bad bat. is when the sides are bulged out. That means at one point in time the acid and water seperated and the water froze pushing the sides out.
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Old 11-29-2011, 01:07 PM   #4
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thanks for the quick replies guys! i would guess the battery as well. i guess i should have mentioned i took it to advance and the guy hooked it up and said the battery was fine. i started it up and he said the alternator was fine as well. he did mention it looks like a boat battery but not sure what he meant.

i just took it home for lunch, its about 38F outside right now, and it did the same thing when i started it here at work and then when leaving home to come back. i shut it off here in the parking deck and waited just couple minutes and it starts right up just fine now that its warm.

i did notice that i had it on a radio station and just clicked on the ignition but not the engine and after getting the engine going the radio had reset. so i know the radio is losing all power only during engine start, not while it sits and cools. dont know if that helps...

maybe the advance guy showed the battery being okay because the jeep was hot and battery warm. is this something batteries do when theyre trying to die?
'98 4.0 manual, 1.75" coil spacers, on 31" dicks
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Old 11-29-2011, 03:26 PM   #5
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I have found a bad battery cable or conections can cause problems
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