95 jeep yj 2.5 not running right - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > 95 jeep yj 2.5 not running right

Building a Bumper?Ruffstuff Axle Simple Swap Kit!~Artec JK 1 TON SWAP~

Reply
Unread 08-31-2013, 02:25 PM   #1
360jeepboy
Registered User
1995 YJ Wrangler 
 
Join Date: Apr 2013
Location: Dalton, Ga
Posts: 105
95 jeep yj 2.5 not running right

Ok I need some opinions on this one. The jeep starts up just fine and as long as I'm driving it does fine. The problem comes when I have to set and let it idle for an extended amount of time, say at a red light or a drive through. Depending how long I set there and idled when I take off the jeep acts like it is flooded. It will spit and stall and skip and go on. The longer I set there and idle the worse it is. Once I start driving it for a while it will clear up, as long as I don't stop again.

I just changed the O2 sensor and the problem didn't stop. My next thought is I might have a leaking fuel injector causing this. Would having the distributor off by one tooth cause this problem?

360jeepboy is offline   Reply With Quote
Unread 08-31-2013, 05:46 PM   #2
Macmqs
Registered User
2013 JK Wrangler 
 
Join Date: Jan 2013
Location: Fredericksburg, VA
Posts: 9
I kinda had the same problem but mine would just shut off, I took off the throttle body and cleaned it. It could be worth a shot as all you need is a torx to get it off. I would also clean the IAC.

Heres the write up for the IAC http://www.jeepforum.com/forum/f13/h...-valve-756934/

And the throttle body and IAC video
Macmqs is offline   Reply With Quote
Unread 08-31-2013, 08:16 PM   #3
360jeepboy
Registered User
1995 YJ Wrangler 
 
Join Date: Apr 2013
Location: Dalton, Ga
Posts: 105
I don't think the IAC valve or a dirty throttle body would cause this issue. It doesn't happen at idle, just when I give it throttle. The longer the jeep sets at idle the worse it is. Feels like it is flooding like and old carb.
360jeepboy is offline   Reply With Quote
Unread 09-01-2013, 08:02 PM   #4
360jeepboy
Registered User
1995 YJ Wrangler 
 
Join Date: Apr 2013
Location: Dalton, Ga
Posts: 105
No one else has any ideas?
360jeepboy is offline   Reply With Quote
Unread 09-02-2013, 07:27 AM   #5
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 14,551
Macmqs great video! I added it to my bookmark list. I will definitely be referencing it on future post. Cleaning the TB and IAC is a routine maintenance and I recommend doing it every time you tune it up. Even if it isn't your issue it is a good thing to do. You could be loading up with fuel at idle. The first thing you need to do is check for any fault codes:
http://www.jeepforum.com/forum/f12/h...codes-1257145/

Get the fuel pressure guage from the local parts store tool loan program. Check your fuel pressure: 31psi idle, 39 with the vacuum line for the regulator pulled, greater then 20 psi with the engine off for more then 20 minutes.

Other possibilities will require a multimeter to test. Post back the results for the fuel pressure and fault codes.
Que89YJ is offline   Reply With Quote
Unread 09-03-2013, 04:23 PM   #6
360jeepboy
Registered User
1995 YJ Wrangler 
 
Join Date: Apr 2013
Location: Dalton, Ga
Posts: 105
No codes other then 12, 33, and 55.

I have a fuel pressure gauge, I just need to get the right fitting for the jeep fuel rail. I just put a new Bosh pump in so I would think it would be doing fine, and looks to me that it has plenty of pressure.

I just ordered some Ford S3 EV1 plugs with the 4 hole set up. Didn't cost much so I will see if those solve my problem.

No one has answered my question of; If the distributor was off by one tooth would it cause an issue like this?
360jeepboy is offline   Reply With Quote
Unread 09-03-2013, 05:42 PM   #7
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 14,551
If the tooth was wrong by one it would idle like crap and you would have no power or it would backfire all the time.
Que89YJ is offline   Reply With Quote
Unread 09-03-2013, 05:44 PM   #8
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 14,551
Too much fuel is what I think or a bad injector. The pressure test will tell you.
Que89YJ is offline   Reply With Quote
Unread 09-04-2013, 11:15 AM   #9
360jeepboy
Registered User
1995 YJ Wrangler 
 
Join Date: Apr 2013
Location: Dalton, Ga
Posts: 105
Quote:
Originally Posted by Que89YJ View Post
Too much fuel is what I think our a bad injector. The pressure test will tell you.


I'm not sure I understand what your trying to say here.
360jeepboy is offline   Reply With Quote
Unread 09-04-2013, 12:55 PM   #10
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 14,551
Do a pressure test. The fuel pressure test will tell if you have a leaky injector, bad check valve, pinched return line or low supply pressure. Do the test and see what you get. Too much fuel pressure will cause it to load up at idle. Bleed down preessure fail will tell you that you have a bad injector or check valve. Post what you get when you test it.
Que89YJ is offline   Reply With Quote
Unread 09-04-2013, 06:33 PM   #11
360jeepboy
Registered User
1995 YJ Wrangler 
 
Join Date: Apr 2013
Location: Dalton, Ga
Posts: 105
Quote:
Originally Posted by Que89YJ View Post
Too much fuel is what I think or a bad injector. The pressure test will tell you.
Ok now that makes more sense. lol

Yea that is what I am thinking also. I have a fuel pressure gauge, just need to find the right adapter for the jeep. I will no something on Saturday. I have to change my wives brakes so I will be with all my tools.

To much pressure would mean a bad regulator. If she has good pressure then that would point to a bad injector. I'm I right?

I always have the regulator off the engine I pulled out of the jeep so I could always swap them out for free.
360jeepboy is offline   Reply With Quote
Unread 09-04-2013, 06:47 PM   #12
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 14,551
Too much pressure can be a couple things. Test it and post back what you get
Que89YJ is offline   Reply With Quote
Unread 09-10-2013, 08:22 PM   #13
360jeepboy
Registered User
1995 YJ Wrangler 
 
Join Date: Apr 2013
Location: Dalton, Ga
Posts: 105
So I checked the pressure today, and I put my new injectors on.

First off. It held 39psi with the engine off. Held 32-33psi at idle and 40psi with the regulator unplugged, while the jeep was running.

I put the ford 19lb injectors on and so far I haven't had the running problem yet. I made it a point to stop at plenty of red lights and stop signs for long periods of time.
360jeepboy is offline   Reply With Quote
Unread 09-10-2013, 08:26 PM   #14
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 14,551
Great. Keep us updated.
Que89YJ is offline   Reply With Quote
Unread 09-12-2013, 09:26 PM   #15
360jeepboy
Registered User
1995 YJ Wrangler 
 
Join Date: Apr 2013
Location: Dalton, Ga
Posts: 105
Still running good and haven't had the flooding problem sense the new injectors. So it looks like that was my problem.

Now I just need to fix the exhaust leak. lol
360jeepboy is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.