Morning Starting Issues - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 02-08-2011, 03:47 PM   #1
Jeeper
 
CaptainV45's Avatar
 
Join Date: Oct 2010
Location: Valley Forge Area, Pennsylvania
Posts: 48
Morning Starting Issues

Since winter began, every morning my Jeep (98 SE 4cyl 5spd) gives me some trouble starting it up. The starter cranks normally but the engine doesn't fire up right away. Usually on attempt two at starting it the engine will make one pitiful put and not start as soon as I let go of the key. It will take another one to five time for the Jeep to finally fire up. When it does fire up, it runs rough for a few seconds before running normally. I always have the heater switch in the off position when I crank over the engine (a trick my old man gave me from a K car that wouldn't start if the AC compressor was engaged).
The Jeep will drive to work normally. At my lunch break it will start on the first try and it will start perfectly when it's time to go home and any subsequent start ups that happen that night. But as soon as it sits overnight, the problem returns.
It didn't bother me much at first, but it seems to be taking longer to start on me. And something different happened this morning. The engine almost stalled on me at the first traffic light I was stopped at when I let out the clutch to go on green.

Anyone have a suggestion as to what may be the root and if there is a fix. I saw other peoples posts with similar problems, but none exactly like mine.

Thanks!

CaptainV45 is offline   Quote Quick Reply
Old 02-08-2011, 03:56 PM   #2
Jeeper
 
Loic's Avatar
 
Join Date: Jun 2009
Location: LAS VEGAS
Posts: 794
back flow valve in the fuel pump going bad?
on my 98 tj i had to change it last year.

Loic is offline   Quote Quick Reply
Old 02-09-2011, 07:53 AM   #3
Jeeper
 
CaptainV45's Avatar
 
Join Date: Oct 2010
Location: Valley Forge Area, Pennsylvania
Posts: 48
Quote:
Originally Posted by Loic View Post
back flow valve in the fuel pump going bad?
on my 98 tj i had to change it last year.
Is there a way to check and test that?
CaptainV45 is offline   Quote Quick Reply
Old 02-09-2011, 10:05 AM   #4
Jeeper
 
Loic's Avatar
 
Join Date: Jun 2009
Location: LAS VEGAS
Posts: 794
i think you can check the fuel line pressure, in my case it was obvious the fuel pump had to be replaced, cold start i had to crank it several time for it to start, but if i turn off the engine and try again it would start right up. not really difficult to change, you have to dtoo the gas tank but its no biggy
Loic is offline   Quote Quick Reply
Old 02-09-2011, 10:06 AM   #5
Jeeper
 
Loic's Avatar
 
Join Date: Jun 2009
Location: LAS VEGAS
Posts: 794
im sure somebody will shim in to check the fuel line
Loic is offline   Quote Quick Reply
Old 02-09-2011, 10:09 AM   #6
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 31,767
Images: 2
Try this tomorrow morning... cycle the ignition key 4-5 times to the On (not start) position before trying to start it. You will hear the fuel pump turn on and then shut off a second or two later each time. If it starts up immediately after that, you can pretty well trust that the anti-drainback check valve inside the fuel pressure regulator is leaking and allowing the gas to drain down out of the engine instead of staying put for a fast start. Cycling the fuel pump several times, once is not enough, allows it to refill the drained fuel lines and fuel rail next to the fuel injectors near the top of the engine.

Here's a pic of the fuel pressure regulator from when I replaced mine earlier this year. You have to drop the tank to get to it.
Attached Thumbnails
Click image for larger version

Name:	FuelPressureRegulator1.jpg
Views:	50
Size:	146.6 KB
ID:	37437  
__________________
Remember that having a different opinion doesn't also require one to be a jerk when expressing it.

When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 02-09-2011, 11:07 AM   #7
Jeeper
 
CaptainV45's Avatar
 
Join Date: Oct 2010
Location: Valley Forge Area, Pennsylvania
Posts: 48
I will have to check that out tomorrow.

This shows how much a noob I am with Jeeps. I would have thought the fuel pump would be on the engine. That's what happens when most of your automobile mechanical knowledge comes from a 74 VW.

It only took two try's to get it to start this morning and no stalling and shuddering. Stiff shifting though, but that's expected when it's a very cold morning.
CaptainV45 is offline   Quote Quick Reply
Old 02-14-2011, 08:08 AM   #8
Jeeper
 
CaptainV45's Avatar
 
Join Date: Oct 2010
Location: Valley Forge Area, Pennsylvania
Posts: 48
It worked! Every morning cycling the ignition key to on and off and it started on the first try.
I am beginning to think it might be cold related too. This morning I was in a rush and forgot to do the cycle. BAM, started right up. It was warm enough to have the windows open for my commute to work.
CaptainV45 is offline   Quote Quick Reply
Old 03-03-2011, 10:20 PM   #9
Jeeper
 
CaptainV45's Avatar
 
Join Date: Oct 2010
Location: Valley Forge Area, Pennsylvania
Posts: 48
Wanted to give you folks an update. Turns out my Jeep just needed a tuneup. The distributer and coil were both arcing and the wires were bad. It seems the cold wet weather was making it worse which would explain why it ran fine on sunny days.

CaptainV45 is offline   Quote Quick Reply
Reply

Tags
1998 , morning , startup , trouble

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.



« Question | "brutus" »
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
'95 with cold starting issues JeepMedic32 YJ Tech Forum 8 02-26-2011 01:48 PM
having trouble starting up in the morning TheQuest YJ Tech Forum 2 12-21-2010 05:42 PM
starting issues schnutzy TJ Tech Forum 9 09-30-2009 02:09 PM
similar tj perf issues tucson97 TJ General Discussion Forum 2 10-15-2005 05:46 PM



» Featured Product

All times are GMT -5. The time now is 03:02 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