1990 wrangler hard start (carb) - 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 WranglerForum.com
Old 01-13-2010, 08:53 PM   #1
Join Date: Jan 2010
Posts: 1
1990 wrangler hard start (carb)

I have a 1990 Wrangler 4.2L (weber carb) that takes about 4 cranks to start with cold engine. I replaced the fuel pump (mechanical) and fuel filter, plugs, wires. It seems like the fuel does not reach the carb?? I pump the gas 3x before starting....still no go. Once it starts up it runs great right away. If it sits for a day, it goes back to 4 long cranks again. Any ideas??

sps is offline   Quote Quick Reply
Old 01-13-2010, 09:19 PM   #2

WF Supporting Member
Fweaky's Avatar
Join Date: Aug 2009
Location: Central Virginia
Posts: 2,202
Images: 18
Choke working?

Nothing is foolproof to a sufficiently talented fool.
Fweaky is offline   Quote Quick Reply
Old 01-13-2010, 09:41 PM   #3
Supporting Member

WF Supporting Member
scott howard's Avatar
Join Date: Dec 2009
Location: wichita falls texas
Posts: 1,035
Have you done the nutter bypass yet if not that is your first thing to do.
Then set the timing at 8 degree's.
Make sure your choke is working and if it is your carb is most likely a little lean
and a lean mixture will make for hard cold starts.
If you have no stumbling or rough running once warm i would say you dont have vacuum leaks.
and with the weber carb you only need 3.5 pounds of fuel pressure so i assume you have a regulator for that,

But first do the bypass , set timing , new plugs, adjust air mixture and that should do it.

give me a call if you need more help

scott howard
scott howard 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
1990 wrangler FS in Chico, CA ccpanel Classifieds Archive 1 07-11-2009 02:13 PM
1990 Wrangler - fuel pump & sending unit 93Gr YJ Tech Forum 15 05-11-2009 08:47 AM
Should I buy the 1990 Jeep Wrangler?? steveshra YJ General Discussion Forum 13 06-15-2007 07:05 AM
1990 jeep wrangler problem mbehr WF New Member Check In 14 02-21-2007 10:59 PM
1999 Jeep Wrangler cranks and no start troymach1one TJ Tech Forum 1 07-10-2006 10:02 AM

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 05:16 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