Cold starts slow in the mornings - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on
Old 11-29-2011, 09:58 AM   #1
Join Date: Feb 2011
Posts: 6
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?

i came to get down.
truckbed is offline   Quote Quick Reply
Old 11-29-2011, 10:06 AM   #2
Hardcore Jeeper
Peepers's Avatar
Join Date: Oct 2010
Location: Windsor, CT
Posts: 3,320
Might be a battery issue. You could need a new battery.

What have we got?
We have one heavily armed Recreational Vehicle

The Power Tech 6
Peepers is offline   Quote Quick Reply
Old 11-29-2011, 10:10 AM   #3
President, ThumbJeeps

WF Supporting Member
sevenservices's Avatar
Join Date: Sep 2009
Location: Mid-Michigan/Thumb
Posts: 3,938
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.
President, ThumbJeeps
CB Callsign "AirForce One"

1994 Wrangler YJ I6 4.0 H/O Auto 3 spd. 4" RC (33x12.5) (15x8) 3:54 Gears
sevenservices is offline   Quote Quick Reply
Old 11-29-2011, 12:07 PM   #4
Join Date: Feb 2011
Posts: 6
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?
i came to get down.
truckbed is offline   Quote Quick Reply
Old 11-29-2011, 02:26 PM   #5
flatline's Avatar
Join Date: May 2010
Location: pinole ca.
Posts: 680
Images: 3
I have found a bad battery cable or conections can cause problems
flatline is offline   Quote Quick Reply

Quick Reply

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
99 Wrangler heater blowing cold..blend door? twclayers TJ General Discussion Forum 4 02-12-2011 06:45 PM
Cold start issues KLASIK97 TJ Tech Forum 14 11-23-2010 06:43 PM
A/C Question - Cold Air Blowing from Everywhere! seadoons TJ Tech Forum 7 09-06-2010 12:53 PM
Erratic idle after start up for a minute when hot or cold? autopc25 TJ Tech Forum 2 01-09-2010 06:25 PM
Cold 'nuff for ya? skeeter Off-Topic 12 12-08-2009 08:06 PM

logo carid shop wrangler parts carid fender flares custom wheels store avs deflectors at carid

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 02:49 AM.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC. is not in any way associated with the Chrysler Motors LLC