post #1 of Old 11-17-2011, 05:26 PM Thread Starter
Arsenal101
Registered User
1996 FSJ Cherokee 
 
Join Date: Nov 2011
Location: Pittsfield
Posts: 1
96 Cherokee Sport - Fuel Issues

I have a 96 Cherokee Sport, 5 speed 4 wheel drive 2 door with the 4.0 straight 6 with 205,000 miles, and lately its been acting like an injector was stuck open. When it warms up it would have a really rough idle and alot of black smoke was comming out of the tail pipe. but the fuel pressure was good. I have tried running SeaFoamŪ though it and a fuel injector cleaner through the tank. Just the other day it set off a check Engine light for a P0171 code, system running to lean. I think it may be a dirty MAP sensor? or maybe a shorting out upstream 02 sensor? just looking for some other oppinions so i dont go replacing all injectors and have it not be the case.

Arsenal101 is offline  
post #2 of Old 11-17-2011, 05:59 PM
CJ7-Tim
Real Jeeps have dents
 
CJ7-Tim's Avatar
2000 XJ Cherokee 
 
Join Date: Apr 2002
Location: out in the garage - Minneapolis
Posts: 24,419
The most common causes would be a failing O2 sensor, or a leaky exhaust manifold.

If the O2 sensor is the original, replace it. Check the exhaust manifold for cracks, if cracked, replace it. Cracked manifolds are very common.

P0171 JEEP - Fuel System 1/1 Lean

Symptoms
- Check Engine Light ON
- Excessive Fuel Consumption

Possible causes
- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty (MAP) sensor

.
Attached Thumbnails
Cracked Manifold.jpg  

.

A recent Gallup public opinion poll shows the NRA, at 58% approval, has a higher approval rating than either Hillary Clinton or Barack Obama.

Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ...

Originally Posted by Ronald W. Reagan: Government is not the solution to our problems; Government is the problem.
CJ7-Tim is offline  
Reply

Tags
1996 , 5 speed , cherokee , injector leak , sport


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
97 Jeep Cherokee Sport Issues dtreed1 XJ Cherokee Technical Forum 6 12-19-2013 11:57 PM
1999 Cherokee Sport Horn issues??? shelby_Extreme XJ Cherokee Technical Forum 2 02-04-2010 06:37 PM
2001 Jeep Cherokee Sport AC issues... Squid78 XJ Cherokee Technical Forum 6 07-24-2009 08:47 PM
Just bought a 93 cherokee sport 2dr, some issues. black-z XJ Cherokee Technical Forum 2 06-06-2009 05:41 AM
Electrical Issues - 99 Cherokee Sport blf XJ Cherokee Technical Forum 6 05-26-2007 03:50 AM

Posting Rules  
You may not post new threads
You may not 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