well i have had my jeep for over a month and a 1/2. i bought it used and it has about 36k and some change on it. this morning and yesterday morning, its been around 14-19 outside. i go to start it this morning and it cranked over so slow, i was waiting for it to stall. it didnt, thank god. but im wondering what could be causing it. i still have the 500 amp maintenance free battery that it came with from the factory. i do plan on upgrading to a red-top soon, but is the battery the problem or the starter?
Its not the starter if it cranking slow. Its either your Battery or the wire from the battery to the starter (this is what my wifes jeep had). Check the wire for crack/corrosion, and good contacts at the starter. Sometimes if you have a leak at the rear main, it causes the starter to get nasty causing the problem. Personally, Im not a maintenance free battery fan, go with a red top, or better yet, go to Sams Club and pick up a good (high cranking amp) battery there for much cheaper.
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ok this may be a dumb question.... but when i disconnectthe battery it wont lock me out of my radio like it did on my blazer? i know in my yj i did that and it just reset my headunit. but i have the stock system in so i was just wondering.
Possibly the cold weather is making the viscosity of the oil higher (viscosity changes with temperature). Might want to make sure you have 5W-30 in there. Also, do the headlights go dim when trying to start it up? This would indicate weak battery. You can take the battery to some autoparts stores (like Autozone) and they will test it under load for free.
1998 TJ Sport, 4.0L - 5 spd -Suffering from frame rot
2006 Grand Cherokee Overland (5.7L HEMI) HEMI Club Member #53
Mines 10 months old and has 17,500 miles on it. It was 14 out this morning and it cranked real slow to the point where I thought it wasn't going to start. I'm thinking this is how it is for the cheap stock battery they use. I'm using 5w30 synthetic oil also.
2004 Black Rubicon w/ 5 spd
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Mine does it with a fairly new optima battery. I Don't think it's the battery... Have a buddy with an XJ and his was doing the same thing as mine. He replaced the starter and it spins over like a top now.
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check over all your starter connections, and battery terminals, make sure they are clean. if the problem persists, it is most likely a battery. the red top is perfect for what you are describing. as far as the radio locked out, what is meant by that? my 2003 has the new style radio, and if i disconnect it, and plug it back in, it retains my presets. it is just a feature of the deck. older YJ's etc wont do that...
oh yeah, and your headlights should dim slightly even if the battery is new, but if they dim almost off, then it is your battery! watch your voltage meter on your dash while cranking. if it drops to like 10-11, it is not bad, but if it drops way down, your battery is done. get a red top. www.remybattery.com $108.95 plus shipping
I think the 4.0 just doesnt like the cold, everyone with it has problems where it seems as if it cranks slow when cold 20 and lower degrees outside.
I had a friend with a 4.0 get one aftermarket. He took it to a Jeep Dealer (5 star) and had them put the same one in that the factory normally does.
The mechanics said they actually had to lift the engine up a bit off the mounts to get in there to put it in. But it was all the same, they quoted him a price and he paid it. I think it ended up being $140, or something like that for parts and labor.