Catalyst 3 Misfire
Thread Starter
Member
Joined: Jan 2013
Posts: 106
Likes: 0
From: Sarasota, Florida
Year: 2000
Model: Cherokee
Engine: Straight 6; 4.0L
Catalyst 3 Misfire
2000 Jeep Cherokee Sport reading a check engine light,
Changed the Ignition Rail and the Spark Plugs, erased the check
Engine light and turned back on within 9 miles.
Was talking to a kid at advanced auto who kinda seemed like
He knew what he was talking about but at the same time he was
Hating on the Heep. Anywho he said that he thinks its one of
My Fuel Injectors thats causing this. Since exhaust and emmissions
Wise everything is almost new besides the Fuel injectors. What do you
Guys think about this? Ive been trying to tackle this issue for a little over
A year now. Ill eventually get to a mehanic once I have the $$$ but for now
I would love to hear what you think.
Is this a common issue for the 4.0? Or is it one of those oddball
Situations?
Changed the Ignition Rail and the Spark Plugs, erased the check
Engine light and turned back on within 9 miles.
Was talking to a kid at advanced auto who kinda seemed like
He knew what he was talking about but at the same time he was
Hating on the Heep. Anywho he said that he thinks its one of
My Fuel Injectors thats causing this. Since exhaust and emmissions
Wise everything is almost new besides the Fuel injectors. What do you
Guys think about this? Ive been trying to tackle this issue for a little over
A year now. Ill eventually get to a mehanic once I have the $$$ but for now
I would love to hear what you think.
Is this a common issue for the 4.0? Or is it one of those oddball
Situations?
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
2000 Jeep Cherokee Sport reading a check engine light,
Changed the Ignition Rail and the Spark Plugs, erased the check
Engine light and turned back on within 9 miles.
Was talking to a kid at advanced auto who kinda seemed like
He knew what he was talking about but at the same time he was
Hating on the Heep. Anywho he said that he thinks its one of
My Fuel Injectors thats causing this. Since exhaust and emmissions
Wise everything is almost new besides the Fuel injectors. What do you
Guys think about this? Ive been trying to tackle this issue for a little over
A year now. Ill eventually get to a mehanic once I have the $$$ but for now
I would love to hear what you think.
Is this a common issue for the 4.0? Or is it one of those oddball
Situations?
Changed the Ignition Rail and the Spark Plugs, erased the check
Engine light and turned back on within 9 miles.
Was talking to a kid at advanced auto who kinda seemed like
He knew what he was talking about but at the same time he was
Hating on the Heep. Anywho he said that he thinks its one of
My Fuel Injectors thats causing this. Since exhaust and emmissions
Wise everything is almost new besides the Fuel injectors. What do you
Guys think about this? Ive been trying to tackle this issue for a little over
A year now. Ill eventually get to a mehanic once I have the $$$ but for now
I would love to hear what you think.
Is this a common issue for the 4.0? Or is it one of those oddball
Situations?
Senior Member
Joined: Apr 2012
Posts: 578
Likes: 4
From: Ocean, New Jersey
Year: 2000
Model: Cherokee
Engine: 4.0
The best method to rule out the injector when you have a single cylinder misfire is to switch injectors and see if the misfire code follows the injector. Simple and easy.
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