Jeep Wrangler Forum - Reply to Topic
Jeep Wrangler Forum

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

Join Wrangler Forum Today

Thread: Fuel Problem Reply to Thread
Post Icons
You may choose an icon for your message from the following list:

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:
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.

Additional Options
Miscellaneous Options

Topic Review (Newest First)
07-26-2012 10:53 PM
Originally Posted by kdub View Post
Take off the line that goes into the fuel filter and turn the key.if gas comes out keep going foward to you find the problem.good point about making sure the you put the filter on the right way
Well for 1 thing, turning the key wont do a damn thing on a 4.2L, cause it has a mechanical pump on the motor, not an electric 1 in the tank like them fancy newer(91 and up) machines.

take the main line coming from the pump, off of the filter, put it into a clear 2 liter empty bottle, and roll it over, if the pump is working correctly, it will fill that bottle in about 30 seconds.

If that test is ok, then its onto the rubber line on the carb side of the filter with the same test. That eliminates the "new" parts you put on.

I know when i changed my fuel pump, it had so much draw that it collapsed and cracked the rubber line back at the tank (guess it was time to change them out too). The bigger line 3/8, is the supply line at the tank, and the smaller 5/16 is the return. the 1/4 rubber line at the tank is the breather tube.

Sounds like the cracked line might be your problem, since you say that its trying to start, so therefore its getting a little fuel. Like the pump is trying to work but sucking air as well as fuel.
07-26-2012 10:39 PM
kdub Take off the line that goes into the fuel filter and turn the key.if gas comes out keep going foward to you find the problem.good point about making sure the you put the filter on the right way
07-26-2012 10:31 PM
Redrider94 Did you put the fuel filter in the correct way?
07-26-2012 01:21 PM
jgrom25 No, did not replace parts until I lost the gas. Same exact problem after I replaced parts. starts for a second with gas in carb. I guess I need to check more lines. Thanks for all the thoughts here.any other miracles?
07-26-2012 10:43 AM
kik If you're not getting fuel to the carb. then you have to re-check everything that you did since it seems like the problem came after you replaced those parts. You could have a defective fuel pump, it happens. Maybe the line is the problem. Is the filter an oem type or did you replace it with something else.
07-26-2012 01:48 AM
riceroni87 rubber lines on from gastank dry rotted?
07-26-2012 12:43 AM
jgrom25 Yeah, Not sure. I guess Ill need to check more lines. Any tips on checking them?
07-25-2012 07:21 PM
4Jeepn Start simple, make sure all the new parts you just installed are okay and in working order. Is it possible the line got clogged?
07-25-2012 06:57 PM
Fuel Problem

I have an 88 jeep wrangler. 4.2 straight six. Been driving and fixing it for twenty years but I'm stuck. Driving the other day when I lost power and she stopped as if she was out of gas. I was not. I just replaced fuel filter, mechanical fuel pump and part of the input line. Still not getting fuel into the carb? Any thoughts?

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

All times are GMT -5. The time now is 02:48 AM.

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