slow crank 4.7 - JeepForum.com

 
LinkBack Thread Tools
post #1 of 8 Old 09-06-2010, 10:36 PM Thread Starter
CoolGuyDave
Registered User
2002 WJ 
 
Join Date: Oct 2006
Location: Northern Illinois
Posts: 636
slow crank 4.7

i know this has been covered over and over but id like a second opinion before i spend 180 bucks on a new starter. So it cranks slow, had an old battery in it so i replaced it with a diehard gold. didnt fix the prob (the terminals are clean and tight). Put a meter on the batt and it reads 12.3v. while running its 13.6v. while cranking its 9.XXv. lights are nice and bright... never dim, but it still cranks slow, almost to the point where it sounds like it will stop turning over. i bought the jeep used so i dont know much of its history. but i do know its been replaced before (has an AC Delco starter in it). What are some other things i can check before i make the jump and buy a new one? thanks jeepforum!
-dave


2002 Overland Build/Pic Thread
NIU Mechanical Engineering Grad
"EAT, SLEEP, JEEP!"
CoolGuyDave is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 09-07-2010, 01:01 AM
PCJona
Registered User
2002 WJ 
 
Join Date: May 2010
Location: Port Chester, New York
Posts: 205
its definitely the starter. sorry bud.

just happened to me last month.
PCJona is offline  
post #3 of 8 Old 09-07-2010, 08:55 AM
jfyfe
Registered User
2001 WJ 
 
Join Date: Jan 2007
Location: Indiana
Posts: 35
I'm with PCJona - Sounds like a starter. Pull it and have the auto parts guys test it if you want to make sure. Only other thing I can think of is the taps on the starter are a bit loose, but that is probably unlikely.
jfyfe is offline  
post #4 of 8 Old 09-07-2010, 10:57 AM
mudthang
Registered User
1977 CJ5 
 
Join Date: Nov 2009
Location: NC
Posts: 59
I had a similar problem but my starter tested out fine. I was only getting 6 volts at the starter while cranking. I replaced the battery cables and it fixed the problem.

I did the positive cables first and I was still only getting 6 volts. So I replaced the negative cables next and it started right up.

1977 CJ5 - 304 V8
1999 WJ - 4.7l V8
mudthang is offline  
post #5 of 8 Old 09-07-2010, 12:52 PM
nlynd1978
Registered User
2006 XK Commander 
 
Join Date: Mar 2010
Location: Mchenry county, Illinois
Posts: 633
1. Remove the starter have it tested.

2. check and replace cables.

3. Did you buy the correct battery or the cheap it will fit kind.

Had a simalar problem with my friends car, he bought a brand new battery but only got a 500 cca battery when he needed a 800 cca battery. car would still start but cranked really slow. We checked everything else before i noticed it was the crappy battery he had. Also, just cause its new doesnt mean its good. I got a brand new battery one time for my bike. It was DOA when i got it. Didnt know till i put it in the bike, which would not start still, and took it to a shop. And you can have 12v's on a battery but get no amperage. Just had that problem with another car i was working on the other day. My advice remove the battery and starter and take them in for testing, replace as necessary.

06 Commander Limited,4.7,130k
01 GC Limited,QD-II,4.0,236k-sold
99 GC Laredo,QT-II,4.7,96k-Sold
nlynd1978 is offline  
post #6 of 8 Old 09-07-2010, 02:35 PM Thread Starter
CoolGuyDave
Registered User
2002 WJ 
 
Join Date: Oct 2006
Location: Northern Illinois
Posts: 636
nope.... bought a DieHard GOLD 900+ CCA. i'l check the cables over before i buy a starter. thanks.

2002 Overland Build/Pic Thread
NIU Mechanical Engineering Grad
"EAT, SLEEP, JEEP!"
CoolGuyDave is offline  
post #7 of 8 Old 09-07-2010, 06:30 PM
Double E
2000 Laredo V8
 
Double E's Avatar
2000 WJ 
 
Join Date: Oct 2003
Location: Raleigh, NC
Posts: 4,697
That volt to amp discussion is valid and even new batteries may still need a charge to attain their rated capacity, but he has no dimming, so I'm in the weak starter camp too.

2000 Laredo 4.7L Selec-Trac. 177K miles, Leather, 245 tires, tow package, crappy CD changer, full size spare, roof cross-rails & sunroof.
Changes & fixes: Rear Addco sway bar & greasble bushings, upgraded headlights, upgraded tail lights, new hood struts (replaced 2X), new rear hatchglass struts, new radiator (replaced 3X), new oil pressure sending unit (replaced 4X), 2 new speed sensors, 2 new door lock actuators, new ignition key cylinder, chrome front tow hooks, Mobil 1 Synthetic 5/30, Purolator Pure One oil filter, EBC slotted & dimpled rotors, EBC Greenstuff pads, new front shocks (replaced 3X), new rear shocks (replaced 2X), new IRO steering stabilizer, new timing chain cover, new water pump, thermostat, new thermostat housing, new high pressure power steering hose, Michelin-X radials, new sunroof assembly, new single-piece lug nuts, new exhaust manifold studs & gasket on driver's side, new Durango alternator. Jeepforum.com sticker, Visit cobaltboatsforum.com when you can!
Double E is offline  
post #8 of 8 Old 09-11-2010, 01:05 PM Thread Starter
CoolGuyDave
Registered User
2002 WJ 
 
Join Date: Oct 2006
Location: Northern Illinois
Posts: 636
put in a "NAPA Supreme Power" starter.... starts right up with ease...
thanks all

2002 Overland Build/Pic Thread
NIU Mechanical Engineering Grad
"EAT, SLEEP, JEEP!"
CoolGuyDave is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
clicking/popping when braking at slow speeds. ruggedscotsman WJ Grand Cherokee Forum 8 06-17-2011 10:01 AM
242 Selec Trac - 4wd Slow To Engage xSnoWx WJ Grand Cherokee Forum 11 08-31-2010 06:35 PM
99 WJ 4.7 turns over slow, doesn't want to run when started bigredjeep95 WJ Grand Cherokee Forum 5 07-21-2010 10:22 PM
2001 WJ Slow Oil Leak....Where From? bradbb2005 WJ Grand Cherokee Forum 3 07-09-2010 08:03 PM
!545fre Tranny pops and clunks when i stop or slow!! please help SHOCKER WJ Grand Cherokee Forum 8 05-06-2010 03:49 AM

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 On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome