jeep wont start - Page 7 - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > jeep wont start

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineSavvy Billet LED Tail LightsWant to be able to SEE? DOT Approved Headlights for under

Reply
Unread 02-09-2013, 12:40 AM   #91
JCashen
Registered User
1990 YJ Wrangler 
 
Join Date: Jan 2013
Location: Fort Worth, Texas
Posts: 225
Oh can we wrap the diode in like electrical tape? Or leave it bare?

JCashen is offline   Reply With Quote Quick reply to this message
Unread 02-09-2013, 12:54 AM   #92
JCashen
Registered User
1990 YJ Wrangler 
 
Join Date: Jan 2013
Location: Fort Worth, Texas
Posts: 225
The main reason I ask about the timing is that when looking at it with a timing light it will sit at 8btdc but seems like it jumps to around 0tdc randomly.
JCashen is offline   Reply With Quote Quick reply to this message
Unread 02-09-2013, 05:29 AM   #93
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 15,633
You need to wrap the diode in tape to stop it from shorting out. It stops backfeed from the power. It had no effect on timing.
Que89YJ is offline   Reply With Quote Quick reply to this message
Unread 02-09-2013, 09:22 AM   #94
JCashen
Registered User
1990 YJ Wrangler 
 
Join Date: Jan 2013
Location: Fort Worth, Texas
Posts: 225
Quote:
Originally Posted by Que89YJ View Post
You need to wrap the diode in tape to stop it from shorting out. It stops backfeed from the power. It had no effect on timing.
Sorry I didn't mean to make it seem like I thought the 2 were connected.

It is good to know I need to tape it.

And

Thank you four and que!
JCashen is offline   Reply With Quote Quick reply to this message
Unread 02-09-2013, 10:24 AM   #95
fourbtgait
Registered User
1930 MK Patriot 
 
Join Date: Aug 2012
Posts: 779
If it is jumping around, say 0-8, it would be from surging of the engine.

Did you disconnect and plug the vacumm advance line when you timed it?

Sent from my iPad using JeepForum
fourbtgait is offline   Reply With Quote Quick reply to this message
Unread 02-09-2013, 11:09 AM   #96
JCashen
Registered User
1990 YJ Wrangler 
 
Join Date: Jan 2013
Location: Fort Worth, Texas
Posts: 225
Quote:
Originally Posted by fourbtgait View Post
If it is jumping around, say 0-8, it would be from surging of the engine.

Did you disconnect and plug the vacumm advance line when you timed it?

Sent from my iPad using JeepForum
Vacuum line was plugged. Should I be worried about it if I can drive it around? I lugged it in high gear up hill and low gear high rev. Couldn't hear any detonation and I can tell a difference in the way it drives now and did.

Edit: even with the diode I get run on after driving it. Though just turning it on and then off is fine. I wrapped it in tape. Would a 3a400v diode help?

Fourbtgait how is your jeep running with your 6a?
JCashen is offline   Reply With Quote Quick reply to this message
Unread 02-09-2013, 11:24 AM   #97
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 15,633
With the advanced plugged and timing jumping around it sounds like the timing chain is stretched. You can drive it but you need to figure out why.
Que89YJ is offline   Reply With Quote Quick reply to this message
Unread 02-09-2013, 12:18 PM   #98
fourbtgait
Registered User
1930 MK Patriot 
 
Join Date: Aug 2012
Posts: 779
I havent finished yet. Just now leaving junkyard. I found a 93 family bar to put in my cj.
Did you solder diode in correct orientation?
I have a part # at home for one recommended by jeephammer. I noticed it is larger.
fourbtgait is offline   Reply With Quote Quick reply to this message
Unread 02-09-2013, 12:20 PM   #99
fourbtgait
Registered User
1930 MK Patriot 
 
Join Date: Aug 2012
Posts: 779
When time surges, is the engine itself surging in rpm, not holding steady?
fourbtgait is offline   Reply With Quote Quick reply to this message
Unread 02-09-2013, 12:41 PM   #100
JCashen
Registered User
1990 YJ Wrangler 
 
Join Date: Jan 2013
Location: Fort Worth, Texas
Posts: 225
Quote:
Originally Posted by fourbtgait View Post
When time surges, is the engine itself surging in rpm, not holding steady?
I don't have a working tach yet so I can't tell engine rpm. From ear it sounds like it the engine does surge.
JCashen is offline   Reply With Quote Quick reply to this message
Unread 02-09-2013, 01:01 PM   #101
fourbtgait
Registered User
1930 MK Patriot 
 
Join Date: Aug 2012
Posts: 779
Quote:
Originally Posted by JCashen

I don't have a working tach yet so I can't tell engine rpm. From ear it sounds like it the engine does surge.
More than likely, if the engine rpm's are surging at idle, the emulsion tubes may be clogged a bit.
The carb is a carter bbd?
If so, google the bbd surging at idle. It is a common problem, easy fix.

Sent from my iPad using JeepForum
fourbtgait is offline   Reply With Quote Quick reply to this message
Unread 02-09-2013, 01:04 PM   #102
fourbtgait
Registered User
1930 MK Patriot 
 
Join Date: Aug 2012
Posts: 779
The diode that was recommended to me is a radio shack #276-1144

Did you install new plug wires? 8 or 8.5 mm?

Sent from my iPad using JeepForum
fourbtgait is offline   Reply With Quote Quick reply to this message
Unread 02-09-2013, 01:16 PM   #103
JCashen
Registered User
1990 YJ Wrangler 
 
Join Date: Jan 2013
Location: Fort Worth, Texas
Posts: 225
Quote:
Originally Posted by fourbtgait View Post
The diode that was recommended to me is a radio shack #276-1144

Did you install new plug wires? 8 or 8.5 mm?

Sent from my iPad using JeepForum
I had just installed new plug wires. They're 8mm motor craft ones jeep hammer had in his team rush post.
JCashen is offline   Reply With Quote Quick reply to this message
Unread 02-09-2013, 01:40 PM   #104
fourbtgait
Registered User
1930 MK Patriot 
 
Join Date: Aug 2012
Posts: 779
Quote:
Originally Posted by JCashen

I had just installed new plug wires. They're 8mm motor craft ones jeep hammer had in his team rush post.
Ok good.
Soldering the diode sucks.

Sent from my iPad using JeepForum
fourbtgait is offline   Reply With Quote Quick reply to this message
Unread 02-09-2013, 02:32 PM   #105
JCashen
Registered User
1990 YJ Wrangler 
 
Join Date: Jan 2013
Location: Fort Worth, Texas
Posts: 225
Quote:
Originally Posted by fourbtgait View Post
Ok good.
Soldering the diode sucks.

Sent from my iPad using JeepForum
Yeah. I just picked up the bigger diode. Going to soulder it here shortly.

Although if it is running with key off and I yank the connect of the little red wire to the 12v it turns off. When I check the wire it only has power when key is on.

I might extend the wires into the cab and put them on a switch.
JCashen is offline   Reply With Quote Quick reply to this message
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.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
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






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.