Hard Starting - Engine cranks for a long time - JeepForum.com

 
LinkBack Thread Tools
post #1 of 9 Old 01-23-2010, 07:05 AM Thread Starter
ukgerald
Registered User
1998 TJ Wrangler 
 
Join Date: May 2008
Location: Zimbabwe
Posts: 31
Hard Starting - Engine cranks for a long time

Hi Guys, Just got back from a trip to Lake Tanganika where finding good quality fuel was an issue. I now have a problem starting the Jeep. I have searched under this topic and there are various options - the one I am leaning towards is the fuel pump return valve having failed. Symptoms are : Takes a long time of cranking before it will fire, once running it settles down smooth as ever. To get it to start a bit quicker I crank for a couple of seconds stop, then full throttle and crank again, it then starts pretty quickly. Was wondering whether there are any diagnostics that I can run myself - please bear in mind that I live in the Back of beyond, there is no dealership of reasonable repair centre within 2000km. If the fuel pump is the likely culprit pleas recommend an online company that I could use. Thanks all


If you outlaw guns - only outlaws will have guns!
ukgerald is offline  
Sponsored Links
Advertisement
 
post #2 of 9 Old 01-23-2010, 07:09 AM
TheBoogieman
Disturbed
 
TheBoogieman's Avatar
2003 TJ Wrangler 
 
Join Date: Aug 2006
Location: CharlottesHELL
Posts: 33,444
Turn the key to ON,but don't try to crank it for 5-10 seconds.If it starts up fine it's probably the anti-drainback valve.
TheBoogieman is online now  
post #3 of 9 Old 01-23-2010, 07:35 AM
jeepgunner12
Registered User
1997 TJ Wrangler 
 
Join Date: Jan 2009
Location: edenton
Posts: 493
I TAP the gas when my Jeep does this. Starts every time no prob.

GREEN JEEP CLUB #385

PM me if you have an old hilift and/or a 31x10.5 R15 youd like to trade or sell, im in the market for a jack and a trailspare. Cheers!
jeepgunner12 is offline  
post #4 of 9 Old 01-23-2010, 08:05 AM
jezow2010
Registered User
2001 TJ Wrangler 
 
Join Date: Feb 2009
Location: Linwood MI
Posts: 66
Start your jeep and run it for a minute or so then leave it sit for a half hour to an hour then go to the bleeder on your fuel rail (looks like a large valvestem) and take the cap off and try and bleed the pressure off it. If it has pressure then its not your fuel pump assembly.
jezow2010 is offline  
post #5 of 9 Old 01-23-2010, 08:14 AM
SkylinesSuck
Registered User
1998 TJ Wrangler 
 
Join Date: Nov 2009
Location: Warrenton
Posts: 369
Quote:
Originally Posted by TheBoogieman View Post
Turn the key to ON,but don't try to crank it for 5-10 seconds.If it starts up fine it's probably the anti-drainback valve.
x2 on that. Also one thing to keep in mind. As long as you have the battery power to support it, it's actually probably a good thing to crank it a bit before it fires. It gets just a bit of oil pressure built up and things moving before the engine sees the wear and tear of start up. Mine takes a few seconds to start and I know it's the anti-drain back valve. I'm happy it does it and don't plan on fixing it, but I also know I can just turn the key to "run" for a few seconds then try to start it if I do want it to fire off quickly (like if some girls are watching or something).

'98 Sahara w/AX15 & 4.6L stroker, 2.5" OME lift, 32" BFG M/T's, 8.8 w/Detroit Trutracs & 4.10's F&R
SkylinesSuck is offline  
post #6 of 9 Old 02-07-2010, 03:01 PM
JeepRob98TJ
Registered User
1998 TJ Wrangler 
 
Join Date: Feb 2010
Location: Largo
Posts: 9
Hard Starting Engine

I have this same issue... I had the engine torn apart for 3 weeks of so replacing a piston and rings and rod bearings. And ever since I put it back together it has been starting hard.

I tried what was mentioned above and it started better.. ( turning the key to the On position for 5-10 seconds before starting). Where is this anti-drainback valve located if I wanted to replace it?

Thanks

Rob
JeepRob98TJ is offline  
post #7 of 9 Old 02-07-2010, 03:06 PM
NotURMailman
Web Wheeler
 
NotURMailman's Avatar
2005 TJ Wrangler 
 
Join Date: Nov 2006
Location: 'Round Here
Posts: 7,249
Quote:
Originally Posted by JeepRob98TJ View Post
I have this same issue... I had the engine torn apart for 3 weeks of so replacing a piston and rings and rod bearings. And ever since I put it back together it has been starting hard.

I tried what was mentioned above and it started better.. ( turning the key to the On position for 5-10 seconds before starting). Where is this anti-drainback valve located if I wanted to replace it?

Thanks

Rob
Unfortunately it's part of the pump assembly. You can put an inline check valve from McMaster Carr in the supply line as close to the tank as possible...

My RHD TJ - Savvy equipped... And loving it!

I drive on the right side, what's wrong with you?


Quote:
Originally Posted by Deacon View Post
It's difficult to take you seriously. It's like you're an easily perturbed autistic teenager who's drunk typing the whole time.
NotURMailman is offline  
post #8 of 9 Old 02-08-2010, 08:41 AM
JeepRob98TJ
Registered User
1998 TJ Wrangler 
 
Join Date: Feb 2010
Location: Largo
Posts: 9
Quote:
Originally Posted by NotURMailman View Post
Unfortunately it's part of the pump assembly. You can put an inline check valve from McMaster Carr in the supply line as close to the tank as possible...

That is what I thought but could not verify it.... Thanks...
JeepRob98TJ is offline  
post #9 of 9 Old 12-23-2010, 01:03 AM Thread Starter
ukgerald
Registered User
1998 TJ Wrangler 
 
Join Date: May 2008
Location: Zimbabwe
Posts: 31
Thanks all, meant to get around to this reply some time ago. ordered in a new pump assembly and fitted it (alone and on the floor - what a pain in the ***). It solved the problem straight away. Thanks for the advice and help.

If you outlaw guns - only outlaws will have guns!
ukgerald is offline  
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.



Email Address:
OR

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
91+ Hard or No Start/Long cranks in the cold explained sentinal02 YJ Wrangler Technical Forum 67 08-06-2016 11:41 PM
97 TJ cranks for a long time before start mflint1513 TJ Wrangler Technical Forum 17 11-06-2013 11:34 PM
jeeps having a hard time starting t-bird TJ Wrangler Technical Forum 24 11-08-2009 10:29 AM
Cranks a long time before starting. RH31379 YJ Wrangler Technical Forum 11 10-23-2007 02:23 PM
Hard time starting BumbleBeeTJ TJ Wrangler Technical Forum 1 10-05-2004 10:27 AM

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 On
Refbacks are On

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