Fuel pump ballast resistor on 95??? - JeepForum.com

Reply
 
LinkBack Thread Tools
post #1 of 16 Old 01-25-2011, 04:19 PM Thread Starter
vrodek
Registered User
1995 XJ Cherokee 
 
Join Date: May 2010
Location: New Hampshire
Posts: 47
Fuel pump ballast resistor on 95???

Does anyone know if 95 xj sports have a fuel pump ballast resistor? I've seen pictures of where they are on other years which is right near the airbox, but mine doesn't.

vrodek is offline  
Sponsored Links
Advertisement
 
post #2 of 16 Old 01-25-2011, 04:47 PM
tjwalker
It's the crank sensor!
 
tjwalker's Avatar
1999 XJ Cherokee 
 
Join Date: Nov 2007
Location: Central Minnesota
Posts: 8,746
Garage
My understanding is that the ballast resistor existed between 84-93.

95 would not have one.

99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
Without "data", all you have is an opinion!
tjwalker is offline  
post #3 of 16 Old 01-25-2011, 04:49 PM Thread Starter
vrodek
Registered User
1995 XJ Cherokee 
 
Join Date: May 2010
Location: New Hampshire
Posts: 47
Is there anything like that on a 95?
vrodek is offline  
post #4 of 16 Old 01-25-2011, 04:53 PM
tjwalker
It's the crank sensor!
 
tjwalker's Avatar
1999 XJ Cherokee 
 
Join Date: Nov 2007
Location: Central Minnesota
Posts: 8,746
Garage
The ballast resistor was there to reduce noise in the fuel pump circuit.

It was then determined by design engineers that it wasn't of much benefit and that the fuel pump could handle full voltage.

So it was therefore eliminated.

99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
Without "data", all you have is an opinion!
tjwalker is offline  
post #5 of 16 Old 01-25-2011, 04:55 PM
mecompco
www.midcoastjeep.com
 
mecompco's Avatar
1994 XJ Cherokee 
 
Join Date: Jul 2005
Location: Fairfield, Maine
Posts: 4,253
My '94 and '95 do not have one, my '90 and '92 do. I don't have a '93 (yet).

Michael

'94 Cherokee Country
Engine: 4.0 HO, Sealed canister filter, 3 core CSF steel radiator, CatCo cat, Dynomax Turbo Flow muffler.
Electronics: Remote start/locks, Pioneer DEH-P7800MP w/XM, Polk Audio speakers, Garmin Nuvi 660 GPS, Cobra 148 GTL P&T w/Wilson 1000.
Suspension: Old Man Emu 3" lift+OME AAL, JKS adjustable trackbar, QDs, LCAs UCAs, A.C.O.S., DPG Offroad adjustable bumpstop plate, Daystar poly bumpstops.
Steering: Currie HD steering, C-ROK steering box reinforcement, OME stabilizer.
Armor/Recovery: T&T Custom belly skid, Mopar gas tank skid, JKS LCA mini skids, Rock Lizard Super Skink Sliders, Mopar 2" receiver, ARB Bull Bar/Ramsey REP 8.5 winch.
Drive train: D30 front axle w/Superior Chromo D30 axles & outter seals, D/S 4.56 R&P, ARB locker, Ruff Stuff cover. Ford 8.8 rear axle w/Superior Super 88 kit, Ford Motor Sports 4.56 R&P, ARB locker, SOLID cover, Russell stainless lines. Front and rear Tom Woods HD drive shafts, 242 x-fer case w/Tom Woods SYE.
Tires/Wheels: 33x10.5x15 BFG Mud Terrains on Alcoas.
Misc: Garvin Wilderness rack, Safari Snorkel, Redline Tuning hood lifts.
Awaiting installation: Autometer A pillar gauge pod, oil, water, & tranny temp guages, PIAA driving lights, Goferit tie-rod flip bushing, '95 Brake booster and M/C, M.O.R.E. Motor mounts, TnT Custom 1.5" Shackle.
Stroker Project: HO Block, '99 intake manifold, bored TB, 1" TB spacer, Dynomax Blackjack Header, Permacool electric fan.
mecompco is offline  
post #6 of 16 Old 01-25-2011, 04:55 PM Thread Starter
vrodek
Registered User
1995 XJ Cherokee 
 
Join Date: May 2010
Location: New Hampshire
Posts: 47
But I'm getting the exact same symptoms that a XJ with a resistor would be getting if it had gone bad. Like exactly the same.
vrodek is offline  
post #7 of 16 Old 01-25-2011, 04:57 PM
tjwalker
It's the crank sensor!
 
tjwalker's Avatar
1999 XJ Cherokee 
 
Join Date: Nov 2007
Location: Central Minnesota
Posts: 8,746
Garage
Quote:
Originally Posted by vrodek View Post
But I'm getting the exact same symptoms that a XJ with a resistor would be getting if it had gone bad. Like exactly the same.
What symptoms? We need DETAILS if we are going to help you.

99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
Without "data", all you have is an opinion!
tjwalker is offline  
post #8 of 16 Old 01-25-2011, 04:59 PM Thread Starter
vrodek
Registered User
1995 XJ Cherokee 
 
Join Date: May 2010
Location: New Hampshire
Posts: 47
The fuel pump relay is just chattering away very rapidly when it is very cold out and the pump never turns on. And when I try and start it, it just cranks. I've tested all the injectors, fuel pump (and the check valve), distributor, plugs and switched around the relays on the panel.
vrodek is offline  
post #9 of 16 Old 01-25-2011, 05:08 PM Thread Starter
vrodek
Registered User
1995 XJ Cherokee 
 
Join Date: May 2010
Location: New Hampshire
Posts: 47
And the only way that I've been able to start it is I put a small space heater directly on top of the computer for about 20 mins and it starts. So I am able to leave my house and go places but I can't get home because it's too cold.
vrodek is offline  
post #10 of 16 Old 01-25-2011, 05:12 PM
tjwalker
It's the crank sensor!
 
tjwalker's Avatar
1999 XJ Cherokee 
 
Join Date: Nov 2007
Location: Central Minnesota
Posts: 8,746
Garage
I will say that I have come across your symptoms one other time and that time, it required a swap of the computer.

99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
Without "data", all you have is an opinion!
tjwalker is offline  
post #11 of 16 Old 01-25-2011, 05:14 PM Thread Starter
vrodek
Registered User
1995 XJ Cherokee 
 
Join Date: May 2010
Location: New Hampshire
Posts: 47
Yep that's what I've been reading. I ordered a refurbished one which should be here in a couple days. Is it as simple as taking the old one out and putting the new one in? Or does the dealership have to do something?
vrodek is offline  
post #12 of 16 Old 01-25-2011, 05:51 PM
tjwalker
It's the crank sensor!
 
tjwalker's Avatar
1999 XJ Cherokee 
 
Join Date: Nov 2007
Location: Central Minnesota
Posts: 8,746
Garage
If you ordered one on-line, it should be ready to install and should be from the same year of your XJ. No flashing required at dealer.

Be sure to let us know if the new computer takes care of this..........

99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
Without "data", all you have is an opinion!
tjwalker is offline  
post #13 of 16 Old 01-25-2011, 06:17 PM Thread Starter
vrodek
Registered User
1995 XJ Cherokee 
 
Join Date: May 2010
Location: New Hampshire
Posts: 47
Yeah I specifically chose one for a 95. It however did not say that it was ready to install. Should I call them and ask or get some info from a dealer?
vrodek is offline  
post #14 of 16 Old 01-25-2011, 06:39 PM
scott_jeep
Registered User
1996 XJ Cherokee 
 
Join Date: Jul 2009
Location: Boston, MA
Posts: 448
Quote:
Originally Posted by vrodek View Post
And the only way that I've been able to start it is I put a small space heater directly on top of the computer for about 20 mins and it starts. So I am able to leave my house and go places but I can't get home because it's too cold.
I feel your pain. I've never had it happen to a car but my old Apple PowerMac G5 used to require the same setup. Had to put a space heater on it for about 30 minutes whenever outside temp dropped below 40. Even if the office was set to 80 it somehow knew. So annoying have to come in 30 minutes early every day to warm up the computer.
scott_jeep is offline  
post #15 of 16 Old 01-25-2011, 06:46 PM Thread Starter
vrodek
Registered User
1995 XJ Cherokee 
 
Join Date: May 2010
Location: New Hampshire
Posts: 47
I can't think of a worse inconvenience lol.
vrodek 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
How to Install a Fuel Pump Ballast Resitor in a 87 MJ madwild MJ Comanche Technical Forum 14 05-14-2011 01:40 PM
Fuel Pump Ballast Job?? 89XJ My1989Jeep XJ Cherokee Technical Forum 3 09-01-2010 06:11 PM
Fuel Pump Ballast Resistor Untouchable XJ Cherokee Technical Forum 10 02-04-2010 05:31 PM
Start but no run..ASD...ballast resistor...or pump relay? Laodicea XJ Cherokee Technical Forum 4 02-19-2008 02:35 PM
Fuel Pump ballast resistor wiring schematics? 88 cherokee KariGrrrl XJ Cherokee Technical Forum 9 07-29-2005 06:41 PM

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