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Unread 05-24-2013, 03:53 PM   #1
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Join Date: May 2013
Location: Torrington, CT
Posts: 1
97 4.0L Wrangler Misfire Mystery

Hi All,

New to the forum here, so excuse any newb mistakes that follow. I have a 97 4.0L Wrangler. I changed the plugs and wires because I noticed that Cyl.s 1 + 4 were misfiring. Unfortunately that didn't help. So I checked the plugs again and found that the plugs for Cyl. 1 + 4 didn't even look like they were used. There is definitely gas going into the cylinder, I just dont think cylinders 1+4 are firing.

What could this be? Have any of you dealt with this before?

97WranglerCT is offline   Reply With Quote Quick reply to this message
Unread 05-24-2013, 04:07 PM   #2
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2003 TJ Wrangler 
Join Date: May 2004
Location: Erie, PA
Posts: 1,468
You said you did plugs and wires, what about the cap and rotor?
Hers - 2005 Jeep Grand Cherokee Laredo 3.7 4x4
Mine - 2003 Jeep Wrangler X
festerw is offline   Reply With Quote Quick reply to this message
Unread 05-24-2013, 08:03 PM   #3
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1997 TJ Wrangler 
Join Date: Oct 2009
Location: Longmont, Colorado
Posts: 7,003
On cylinders 1 and 4 pull the plugs and crank the engine, watch to see if they are sparking.
CU Boulder Aerospace Engineering
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