cylinder misfire
Thread Starter
Newbie
Joined: Aug 2009
Posts: 2
Likes: 0
Model: Cherokee
cylinder misfire
My 1999 6 Cyl. Jeep Cherokee is missing on Cyl 2. I have replaced the Plugs, Plug caps and no change. I replaced the coil bar and then it would not start at all. I bought another Coil bar and tried it. It still wouldn't start. I put the old one back on and it started but is still missing. The code is P0302 showing misfire in cly 2. I’ve replaced the fuel injector for #2 and it made no difference. I pulled the spark plug for #2 and it looked like a brand new one out of the box. Does anyone know what’s going on or can guide me?
Caracticus Potts The Mod
Joined: Jul 2009
Posts: 5,298
Likes: 9
From: Hainsville, NJ
Model: Grand Cherokee
Pull out all the plugs and do a compression check. The only way to get a correct reading would be to remove the fuel pump relay and all the plugs.
More than likely when you have replaced the ignition parts to a miss firing cylinder and the fuel injector(new?) and the plug is clean with no signs of fuel waste or antifreeze......then you are looking at a broken valve spring if the miss fire only occurs off idle and load. OR a burned valve if the miss fire is constant
More than likely when you have replaced the ignition parts to a miss firing cylinder and the fuel injector(new?) and the plug is clean with no signs of fuel waste or antifreeze......then you are looking at a broken valve spring if the miss fire only occurs off idle and load. OR a burned valve if the miss fire is constant
Thread
Thread Starter
Forum
Replies
Last Post
MightyMouse8
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
14
Oct 8, 2015 08:57 AM
zumer715
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
10
Oct 3, 2015 07:07 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)