fuel system to lean

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Mar 3, 2011 | 08:52 PM

jimbo98xj

Thread Starter

Senior Member

Joined: Jun 2010

Posts: 517

Likes: 0

From: slidell, LA

Year: 1998

Model: Cherokee

Engine: 4.0L inline 6 cylinder

fuel system to lean

ive changed my fuel pump, fuel pressure regulator, spark plugs, and wires, distributor cap and rotor, throttle positioning sensor, i also have the 703 neon injectors, ive changed my upstream o2 sensor 3 times and ive changed my downstream sensor 1 time. im going crazy everything i replace never seems to fix my problem

Mar 3, 2011 | 09:10 PM

Willys55

Caracticus Potts The Mod

Joined: Jul 2009

Posts: 5,298

Likes: 9

From: Hainsville, NJ

Model: Grand Cherokee

Check for a vacuum leak around the intake mounting flange and check that your pcv valve is not plugged.

Mar 4, 2011 | 05:37 AM

tjwalker

CF Veteran

Joined: Nov 2010

Posts: 5,839

Likes: 116

From: In the middle of Minnesota!

Year: 1999

Model: Cherokee

Engine: 4.0

Post the EXACT OBD code here for the most accurate replies.

Interpreting these codes (especially lean/rich codes) is not always straight forward........

Mar 4, 2011 | 05:57 AM

freegdr

CF Veteran

Joined: Mar 2010

Posts: 47,923

Likes: 38

From: Broward County Fl.

Year: 1989 xj sport 2dr

Model: Cherokee

Engine: 12 hole bosch Injectors

Quote:

Originally Posted by tjwalker

Post the EXACT OBD code here for the most accurate replies.

Interpreting these codes (especially lean/rich codes) is not always straight forward........

code number posting can keep the ;did all this and still doing the same thing; posts from happening