slow to crank over.. battery or starter? - JeepForum.com

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post #1 of 23 Old 01-18-2005, 05:38 AM Thread Starter
paroxysym
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slow to crank over.. battery or starter?

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?


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post #2 of 23 Old 01-18-2005, 05:52 AM
XTC Jpr13
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same thing

Same thing has been happening to me. Anyone got an idea whats going on?
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post #3 of 23 Old 01-18-2005, 06:08 AM
the_ronster
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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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post #4 of 23 Old 01-18-2005, 07:53 AM Thread Starter
paroxysym
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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.

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post #5 of 23 Old 01-18-2005, 07:59 AM
skinton
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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.

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post #6 of 23 Old 01-18-2005, 08:20 AM
RockRunner85
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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.

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post #7 of 23 Old 01-18-2005, 09:12 AM
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I just bought a new battery for my wife's XJ, which was turning over slow. Upped the cold cranking amps to 630 and everything is fine now.
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post #8 of 23 Old 01-18-2005, 09:37 AM
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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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post #9 of 23 Old 01-18-2005, 09:45 AM
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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

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post #10 of 23 Old 01-18-2005, 10:12 AM
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Just get an engine block heater.

It's been in the single digits here for the past week (below zero in the morning when I leave for work) and my baby cranks over like a charm....every time. THen I have heat within about 20 seconds.
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post #11 of 23 Old 01-18-2005, 11:31 AM
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Quote:
Originally Posted by Sparty
Just get an engine block heater.

It's been in the single digits here for the past week (below zero in the morning when I leave for work) and my baby cranks over like a charm....every time. THen I have heat within about 20 seconds.

How hard is it to retro fit a block heater?

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.
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post #12 of 23 Old 01-18-2005, 11:54 AM
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Quote:
Originally Posted by thebulkinator
How hard is it to retro fit a block heater?

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.
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post #13 of 23 Old 01-18-2005, 02:01 PM
skinton
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I got a battery from Wal-Mart. It is the EverStart Maxx and has something like 900 cold cranking amps. Always fires right up (unless I have starter issues: see my other thread )

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post #14 of 23 Old 01-18-2005, 05:02 PM
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Its the cold, when its cold mine does it, but when warm, no hesitation.

Nick

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post #15 of 23 Old 01-18-2005, 08:22 PM
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this is like the 10th thread about people asking about why their rig doesn't fire up on the first crank when it's 4 degrees outside......

When it's cold outside:
-The chemical reactions in the battery take place more slowly thus producing fewer electrons. Therefore the starter has less energy to work with when the engine cranks.

-Oil gets a lot thicker when it's cold. Ever put syrup in the fridge? It's hard for the engine to move thick oil around. Try synthetic oil.

-Gas doesn't evaporate as well when it's cold. When it evaporates slower it's harder to burn.

Slow starts are normal when it's cold outside. The cold exploits any weaknesses you may have with your battery or lubrication system.
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