91 YJ has power but no spark? - Jeep Wrangler Forum
Jeep Wrangler Forum

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

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 11-02-2008, 08:08 PM   #1
Newb
 
Join Date: Oct 2008
Posts: 8
Red face 91 YJ has power but no spark?

Evrything powers up and works properly but no spark. I have done miltiple tests on the plugs but no spark. I have replaced the plugs and the coil. Any ideas on what else i should replace that most likely would be the problem? thanks for the help

SMITTY

Smitty91 is offline   Quote Quick Reply
Old 11-02-2008, 08:10 PM   #2
Jeeper
 
jpdocdave's Avatar
 
Join Date: Mar 2008
Location: beach park, il
Posts: 8,162
Images: 7
check cam and crank sensors

__________________
"The danger to America is not Barack Obama but a citizenry capable of entrusting a man like him with the Presidency. It will be far easier to limit and undo the follies of an Obama presidency than to restore the necessary common sense and good judgment to a depraved electorate willing to have such a man for their president."
http://mybroadband.co.za/photos/data...re_cowbell.gif
jpdocdave is offline   Quote Quick Reply
Old 11-04-2008, 07:11 AM   #3
Newb
 
Join Date: Oct 2008
Posts: 13
How about new wires?
pazernaker is offline   Quote Quick Reply
Old 11-04-2008, 12:54 PM   #4
Jeeper
 
skeeter's Avatar
 
Join Date: Dec 2006
Location: Spokane, Wa.
Posts: 3,869
Send a message via Yahoo to skeeter
Mine turned out to be a bad computer.

Did I mention I hate modern vehicles?
__________________
"But it does me no injury for my neighbour to say there are twenty gods, or no god. It neither picks my pocket nor breaks my leg." - Thomas Jefferson, Notes on the State of Virginia, 1782

Arguing with a truck driver is like wrestling with a pig in mud, eventually you realize the pig enjoys it.
skeeter is offline   Quote Quick Reply
Old 11-04-2008, 03:34 PM   #5
that's what she said

WF Supporting Member
 
jgano23's Avatar
 
Join Date: Oct 2008
Location: \m/-_-\m/
Posts: 16,482
Send a message via AIM to jgano23 Send a message via Yahoo to jgano23
x2 check the ignition control module located on the driverside fender behind the coolant overflow tank.
jgano23 is offline   Quote Quick Reply
Old 11-05-2008, 07:48 AM   #6
Jeeper
 
scrambler1's Avatar
 
Join Date: Jan 2008
Location: vermont
Posts: 486
pick up a manual there is a procedure how to use your ecm to diagnose ignition problems,by turning the key on and off in a certain sequence. Very simple I would guess probably 99% accurate. This is cheaper than buying parts you may not need. Another nice tool to own is a sensor tester,I have a cheapy I bought at auto zone. the first time you can diagnose a sensor tester it pays for itself. It probably is either your cam or crank sensor,A spare of each is a good Idea. They can go anytime. goodluck let us know how it turn's out.

__________________
94' wrangler 4 cyl. 5 speed D30/8.8 ARB
82' scrambler 350 TBI/700r4 D30/Currie 9"
07' JK sahara
Whats the deal with the facebook crap?? ->->->->
Grown men should NOT be on Facebook.
scrambler1 is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

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.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

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.



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
91 YJ has power but no spark Smitty91 YJ Tech Forum 7 03-12-2010 12:26 AM
No power acordell TJ Tech Forum 13 02-16-2010 06:26 AM
Linear amp Question silvergoat Communications and Electronics 19 11-07-2008 05:11 PM
12v accessory power OffTheGrid JK General Discussion Forum 2 10-27-2008 09:25 PM
no spark no fuel please help newbie catman YJ Tech Forum 10 12-11-2007 04:07 AM



» Featured Product

All times are GMT -5. The time now is 06:10 AM.



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