No start after battery swap - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 01-19-2004, 10:20 AM
Posts: n/a
No start after battery swap

Situation: Saturday afternoon, Jeep ran great untill I left my lights on. Battery was ancient and wouldn't take a charge so I went and picked up an Optima red top today. Swapped the battery and all it does is crank. Checked everything I could think. Terminals are good, ground is solid, spark is OK, and fuel is reaching the cylenders. Thought my buddies might have screwed with my firing order but NOPE. The No.1 plug didn't seem as wet as it should so I pulled the line off the fuel rail and pleanty of gas came out. I did add injector cleaner with the last fill up (Outlaw brand). I'm stumped! The factory battery tie down wouldn't go back on but how the hell could that affect anything?
Back to the 25 degree snow coverd fun. Any ideas might save me from frost bite!
Sponsored Links
post #2 of (permalink) Old 01-19-2004, 12:03 PM
Join Date: Nov 2002
Location: Maryland
Posts: 118
Thanks: 0
Thanked 0 Times in 0 Posts
Re: No start after battery swap

Look for a wire or vacume hose that might have become disconnected when you put in the new bat. Did you just leave the lights on or was the ignition on the whole time? Following is based on my experiance with an 89 MJ, it has an older FI setup then yours so keep that in mind.
On a FI motor you really need to measure fuel pressure to make sure that is OK. Finding gas at the fuel rail when you disconect it does not give you the whole picture. When you turn the key to on from the off position you should be able to hear the pump in the gas tank run for a second or two, this builds up pressure for starting then the system relies on other readings to see if it should continue pumping fuel (oil pressure for example). I really doubt leaving you lights on killed your fuel pump. I would guess something accidently got disconnected. If the 94 uses the same resister block thingy (sorry for getting technical) check that, make sure you have good connections! Good luck and do the simple stuff first.
bleoh is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
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:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may not 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 On
Pingbacks are On
Refbacks are On

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