Quantcast
Jump to content

  • Do you own an ATV? Join our Forum!

    As a member, you can post in our forums, upload your photos and videos, use and contribute to our downloads, create your own member page, add your ATV events, and even start your own ATV club to host your own club forum and gallery.  Registration is fast and you can even login with social network accounts to sync your profiles and content.

bradleyheathhays

cranks but won't start

Recommended Posts

So I got this '96 Jeep Cherokee XJ that cranks but doesn't start.  It's got around 180k on her but I keep everything in good shape.  Batt seemed strong.

I used to drive it everyday but this past year I've driven it only about twice a week.  It's been just slightly slower to start in the last couple of months, but just barely slower.  Was guessing it had something to do with aging plugs or something.

Drove it yesterday and everything was normal like always, sat overnight and today it cranked but didn't catch.

Any ideas on where to start?

Share this post


Link to post
Share on other sites


So I got this '96 Jeep Cherokee XJ that cranks but doesn't start.  It's got around 180k on her but I keep everything in good shape.  Batt seemed strong.

I used to drive it everyday but this past year I've driven it only about twice a week.  It's been just slightly slower to start in the last couple of months, but just barely slower.  Was guessing it had something to do with aging plugs or something.

Drove it yesterday and everything was normal like always, sat overnight and today it cranked but didn't catch.

Any ideas on where to start?
[/quote


Try checking your alternator and voltage. What about your fuel injectors and fuel filters. Do you have a 30 bar psi gauge?


Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites

I would guess that your coil is getting moisture inside and that’s why it’s been getting worse.   I would throw a new coil and wires with some new plugs.   Def check fuel as @davefrombc said as well. Maybe a new fuel filter wouldn’t hurt too! 

Share this post


Link to post
Share on other sites

Hey guys. This is a 96 Jeep. Not a quad or snowmobile. The only time to check the carb out that way is 87or older Pre obd 1


Sent from my iPhone using Tapatalk

How is your compression, any check engine lights?



Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites


28 minutes ago, 06kfx440 said:

Hey guys. This is a 96 Jeep. Not a quad or snowmobile. The only time to check the carb out that way is 87or older Pre obd 1


Sent from my iPhone using Tapatalk

How is your compression, any check engine lights?



Sent from my iPhone using Tapatalk

I don't see anywhere we mentioned anything about a carb.. I  suggested  checking fuel  pressure to the  injectors.  If your fuel pump  isn't delivering adequate pressure either due to a failing pump or plugged  filter   the vehicle will  be  hard starting  and running poor ..  As Frank  said ,  moisture in the coil or  other components of the ignition system  could  cause erratic  spark.

If it is getting fuel  and  spark , then the problem is in timing  or  other mechanical problems.  One thing that is  often  overlooked   is the possibility  of a plugged catalytic converter  causing running problems.

Edited by davefrombc

Share this post


Link to post
Share on other sites

So far I've been able to run a couple tests..

Hooked up a fuel pressure gauge and first key turn got it up to only 20psi. Second turn got it up to 45. And third and subsequent turns got it up to 48. It only fell to 43 after 2 minutes so I think that means the fuel pressure is good.

Hooked up a spark tester between a plug and wire and it didn't light at all when cranked so I'm guessing I've got a spark problem. I'll start by doing a tune up with new rotor, cap, wires and plugs then see what happens.

  • Like 1

Share this post


Link to post
Share on other sites
5 hours ago, bradleyheathhays said:

So far I've been able to run a couple tests..

Hooked up a fuel pressure gauge and first key turn got it up to only 20psi. Second turn got it up to 45. And third and subsequent turns got it up to 48. It only fell to 43 after 2 minutes so I think that means the fuel pressure is good.

Hooked up a spark tester between a plug and wire and it didn't light at all when cranked so I'm guessing I've got a spark problem. I'll start by doing a tune up with new rotor, cap, wires and plugs then see what happens.

Good diagnosis. My first guess was fuel but since you got pressure and also found no spark, replace those plugs, wires, cap and rotor to start.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Similar Topics

    • By BuckBilly
      Good morning to all !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
      Let's see if we can make this a daily event.
    • By Brent Wright
      What was the last year of these quads?
    • By Brent Wright
      What's a good size to start a 10 year old on?
    • By Dskip160
      Hey there! New guy here! So I bought an 87 250. I turn the key and it has ignition light. I press run and the engine turns over. Guy I bought it from said the carbs may need cleaning, I worked them good cleaned and blown out. I reinstalled the carb and still doing the same thing. It’s getting fuel, the battery is brand new and charged I’m lost here!( purchased a new carb on its way) anyone have any ideas

    • By JustRandy
      After looking at the wire diagram I saw the blue w/black stripe wire is coming from the neutral and reverse lights looking for ground thru the neutral and reverse switches. If it finds ground, the lights come on. The same wire also comes from the neutral relay looking for ground at the same neutral and reverse switches. So it was easy to trick the relay into thinking the engine is in neutral all the time without having the light on all the time. Just cut the blue w/black wire at the relay and ground it. Easy
      Sorry the pics aren't better




      Now it starts in any gear and indicator lights work as they should.
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...