First YJ having issues gettin in runnin - Jeep Wrangler Forum
Jeep Wrangler Forum

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

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 11-02-2011, 12:25 AM   #1
Jeeper
 
poppareilly's Avatar
 
Join Date: Nov 2011
Posts: 103
First YJ having issues gettin in runnin

ok so here goes, I got a 92 YJ from my neighbor(with a 2000 XJ 242 L6 in it). Wont start,so i replaced starter while i was at it replaced alternator plugs and wires. Now it will start but only run for maybe 30-45 seconds before sputtering out. Thought fuel line might be gunked up so i checked pressure at fuel rail and there is pressure, so now im kind of lost as to whats going on. Anybody experience anything similar or have any ideas?
Semper Fi,
Reilly

poppareilly is offline   Quote Quick Reply
Old 11-02-2011, 12:44 AM   #2
Jeeper
 
banks316's Avatar
 
Join Date: Apr 2011
Location: Longview, WA
Posts: 2,089
Check for spark, if you got spark. Take a plug out ground it the the engine and bump the starter.

__________________
93 YJ I6 5spd
My YJ Build +1.5 inch SOA ,37 12.50 15R Swamper M16's, 5.22:1/2.97:1 Stak Tcase with 92 Crawl Ratio--------SOLD...
banks316 is offline   Quote Quick Reply
Old 11-02-2011, 12:53 AM   #3
Jeeper
 
poppareilly's Avatar
 
Join Date: Nov 2011
Posts: 103
have spark, put gas in throttle body and got a start and backfire then sputtered. Should i still try to ground and bump starter?
poppareilly is offline   Quote Quick Reply
Old 11-02-2011, 02:30 AM   #4
Jeeper
 
Mitchness's Avatar
 
Join Date: Jan 2011
Location: Spokane, WA
Posts: 1,168
I would definitely be checking/changing the fuel filter at the least, and maybe checking the fuel pump next.
__________________
Quote:
Originally Posted by wmpiehl
Haha, just don't let Mitch teach you how to wheel, he is really scary
Mitchness is offline   Quote Quick Reply
Old 11-02-2011, 05:08 AM   #5
Jeeper
 
dmblair's Avatar
 
Join Date: Aug 2010
Location: Deer Creek, IL
Posts: 184
Are you keeping the fuel pressure gauge on the rail the whole time....from when it's running to when it dies? Sounds a lot like a fuel delivery issue to me like Mitchness stated. I'd check that pressure gauge right when it's starting to die and see if it's dropping. Can you start it back up instantly after it dies and it runs for 30 seconds again?
dmblair is offline   Quote Quick Reply
Old 11-02-2011, 08:59 AM   #6
Jeeper
 
poppareilly's Avatar
 
Join Date: Nov 2011
Posts: 103
Ya, I was definetly thinking fuel system as well, hope its not fuel pump thats just a pain
poppareilly is offline   Quote Quick Reply
Old 11-02-2011, 10:39 PM   #7
Jeeper
 
poppareilly's Avatar
 
Join Date: Nov 2011
Posts: 103
also not using fuel pressure gauge per se, kinda just using a screw driver to see if im getting pressure. Bought the car for 2 grand and trying to fix on a budget as much as possible right now since Im military.
Havent had a chance to switch out fuel filter yet but will this weekend. Any chance it could be a sensor not functioning properly or a fuse out?
poppareilly is offline   Quote Quick Reply
Old 11-02-2011, 10:46 PM   #8
Jeeper
 
Scottie Daddy's Avatar
 
Join Date: Oct 2011
Location: Pollock, Louisiana
Posts: 99
The fuel filter would be the cheapest/easiest thing to change, and cures alot of problems. If you just got this vehicle (like I did) changing the fuel filter should be on the initial "first thing to do list" because you don't know the history, how long it sat, etc.

You can rent a fuel pressure gauge from Autozone or whatever for cheap. If you're in the military (and I am assuming Marines) then you might even be able to borrow one from one of your friendly mechanic friends off of base. Then you can really get some good info on how the fuel system is acting.

P.S. Thank you for your service for our country Semper Fi
__________________
Christopher M. Scott
Daily Driver - 1995 Jeep Grand Cherokee Laredo - 5.2L V8 (318), auto, 249 xfer case
Toy - 1994 Jeep Wrangler SE - 4.0L i6, 5spd AX15, 231 xfer case
Project - 1995 Dodge Avenger - 2.0L i4, 5spd, 2wd
Scottie Daddy is offline   Quote Quick Reply
Old 11-02-2011, 10:50 PM   #9
Jeeper
 
poppareilly's Avatar
 
Join Date: Nov 2011
Posts: 103
yep Marines (ANGLICO to be exact) and didnt know I could rent it from autozone. Dont really know many mechanics as my unit doesnt use trucks lol.
poppareilly is offline   Quote Quick Reply
Old 11-05-2011, 07:29 PM   #10
Jeeper
 
poppareilly's Avatar
 
Join Date: Nov 2011
Posts: 103
ok, put new fuel filter in (was clogged) now have good pressure to rail. SO at this point I have replaced plugs and wires,starter,alternator, and fuel filter. Still being very stubborn to start and when it does start wont run for more than about 20-30 seconds. Im out of ideas. Any ideas as to what it could be now?
poppareilly is offline   Quote Quick Reply
Old 11-06-2011, 12:54 AM   #11
Jeeper
 
Scottie Daddy's Avatar
 
Join Date: Oct 2011
Location: Pollock, Louisiana
Posts: 99
It might be the fuel pump then. I don't know if our vehicles have seperate fuel pressure regulators from the fuel pump (My ZJ's regulator was a part of the fuel pump, so I had to buy the whole pump when my fuel system gave me problems) If it does have a seperate fuel pressure regulator, that COULD be the problem and it'd be way cheaper (and easier as long as it isn't mounted on the tank or anything) to replace.

The fuel filter being clogged puts a strain on the fuel pump. The pump could be weak now. However, checking the cheaper route (the fuel pressure regulator) would be better than the pump route.

As it pertains to my ZJ I have, it ran good, usually for any amount of time of 5 or 30 minutes, but would then "act like" it was running out of gas or only firing on like 2 or 3 cylinders, until it puttered and died. If I waited like 10 seconds, I could crank it back up, and sometimes it would only be minutes before it did it again. I hooked a gauge to my fuel rail, and had it propped up on the windshield, so I can watch what it was doing. The fuel pressure wasn't ever consistent. It would drop, and try to build up, and drop again, and drop lower, and slightly build up, and drop until it died. I found out it was the fuel pressure regulator that was causing the problem (since I had already changed my fuel filter, which had black crap pouring out of it for like a solid 15 seconds) but on my model of Grand Cherokee, the fuel pressure regulator is part of the fuel pump assembly, and has to be replaced as a whole unit, so that set me back like $300. The actual fuel pump itself was in good, strong condition still.

I know alot of vehicles have their fuel pressure regulator mounted on the fuel rail, or even on the firewall under the hood. The regulator is relatively cheap (vs. a fuel pump) and alot easier to change (vs. dropping the tank)

I am just not familiar with our i6's yet. My Grand Cherokee is a 5.2L V8. So, maybe someone else could help answer if we have seperately fuel pressure regulators mounted away from our fuel pumps?
__________________
Christopher M. Scott
Daily Driver - 1995 Jeep Grand Cherokee Laredo - 5.2L V8 (318), auto, 249 xfer case
Toy - 1994 Jeep Wrangler SE - 4.0L i6, 5spd AX15, 231 xfer case
Project - 1995 Dodge Avenger - 2.0L i4, 5spd, 2wd
Scottie Daddy is offline   Quote Quick Reply
Old 11-06-2011, 05:56 AM   #12
Jeeper
 
DoodleJeep's Avatar
 
Join Date: Jul 2011
Location: Fruitland Mo.
Posts: 87
Images: 1
Do you have a auto hobby shop on base? I am retired Navy and every base I was at had one you could take your vehicle in and work on it yourself for about 5 dollars a day. Every tool you need is there and a mechanic is usually running the place that can help you figure out what is wrong with it.
DoodleJeep is offline   Quote Quick Reply
Old 11-06-2011, 08:30 AM   #13
Jeeper
 
poppareilly's Avatar
 
Join Date: Nov 2011
Posts: 103
yeah Im on pendleton so we actually have two hobby shops. Only problem is they are both on opposite sides of the base from where i live lol. That and I need to get one of my buddies to tow it.
poppareilly is offline   Quote Quick Reply
Old 11-06-2011, 08:27 PM   #14
Jeeper
 
poppareilly's Avatar
 
Join Date: Nov 2011
Posts: 103
ok tested ignition coil with multi-meter was bad and replaced that and a few fuses that were bad. Also checked voltage at battery,alternator, and starter all of em read 12v. Im thinking about throwing in the towel and going to a mechanic but again kinda trying to do it myself as i can actually afford that lol. Also got haynes repair manual, reading through that to see if i can find anything but at this point Im kinda just taking shots in the dark.
poppareilly is offline   Quote Quick Reply
Old 11-06-2011, 08:47 PM   #15
Jeeper
 
Join Date: Nov 2011
Location: Crosby, Tx
Posts: 79
When you turn the key on, do not turn the engine over and see if you can hear the fuel pump prime.

If you don't hear it, it is either your fuel pump relay or the actual fuel pump. There are two relays by the battery, try swapping those relays around and try to prime the pump again. If you get nothing, it is probably the fuel pump or two bad relays..lol
jeffmarion is offline   Quote Quick Reply
Old 11-06-2011, 08:50 PM   #16
Jeeper
 
poppareilly's Avatar
 
Join Date: Nov 2011
Posts: 103
i have 3 relays in my fusebox by the battery and I am getting pressure at fuel rail (havent aquired a pressure gauge yet so cant say for sure. But ill go outside right now and see if anything happens
poppareilly is offline   Quote Quick Reply
Old 11-06-2011, 09:17 PM   #17
Jeeper
 
1fast lorinser's Avatar
 
Join Date: Sep 2011
Location: Nyc queens
Posts: 126
I had almost the same problem with a Lexus I previously owned and it was the fuel pump. Cant guarentee it about your jeep but my Lexus had the same exact symptoms.
1fast lorinser is offline   Quote Quick Reply
Old 11-06-2011, 09:20 PM   #18
Jeeper
 
poppareilly's Avatar
 
Join Date: Nov 2011
Posts: 103
ok, released all fuel pressure at the rail,pulled relay turned it on, checked pressure nothing. Put relay back in turned key on checked pressure but on strong, so thinking its still not pump.
poppareilly is offline   Quote Quick Reply
Old 11-07-2011, 12:15 PM   #19
Jeeper
 
Join Date: Nov 2011
Location: Crosby, Tx
Posts: 79
Hmm.. You are getting fuel to the rail and no fire, and looks like you checked the entire ignition system. I think the next logical things to check would be the fuel injector and ECU.
jeffmarion is offline   Quote Quick Reply
Old 11-07-2011, 03:16 PM   #20
Jeeper
 
poppareilly's Avatar
 
Join Date: Nov 2011
Posts: 103
Ya,i mean I've pretty much replaced the entire system lol,really hoping it don't ecu

poppareilly is offline   Quote Quick Reply
Reply

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.



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
If you are having shifting issues with your NV3550, look inside. mrcarcrazy TJ Tech Forum 77 11-09-2013 10:16 AM
Trektop NX Issues / Resolutions? theotis JK General Discussion Forum 3 09-13-2011 07:11 PM
Past Issues of JPFreek Adventure Magazine for FREE! txoutdoorx4 Off-Topic 0 06-21-2011 11:29 AM
Lifted driveline issues? GroundHawg JK General Discussion Forum 17 05-23-2010 04:05 PM


» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 07:18 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