2000 Cherokee cylinder 3 misfire
02-07-2019 | 09:32 PM
#1
Thread Starter
Newbie
Joined: Feb 2019
Posts: 1
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Model: Cherokee (XJ)
2000 Cherokee cylinder 3 misfire
I recently purchased a 2000 Cherokee and it is misfiring so I took it to a local mechanic he says it’s cylinder 3 and told me to change my coil pack. I changed my coil pack and plugs still misfiring. He also says it has a bad o2 sensor would this have anything to do with the misfire? It runs very rough when driving at low rpm and will not go above 3000 rpm. Any help is greatly appreciated.
02-07-2019 | 11:14 PM
#2
CF Veteran
Joined: Dec 2015
Posts: 3,038
Likes: 337
From: PA
Year: 1997
Model: Cherokee
Engine: 4.0L
Could be heat soak affecting that particluar injector. Does it clear up if you let it sit for a while, or does it do it no matter what? What codes did he find? Whats the actual code number? Does it have dual cats? They will have four o2 sensors. Which one did he say is bad? Sounds like hes guessing.
Dont drive it until its fixed. Running lean is bad for the cat, or cats if its got duals, and its also bad for the engine in general.
Dont drive it until its fixed. Running lean is bad for the cat, or cats if its got duals, and its also bad for the engine in general.
Last edited by fb97xj1; 02-07-2019 at 11:16 PM.
02-08-2019 | 11:19 AM
#5
CF Veteran
Joined: Nov 2010
Posts: 5,818
Likes: 107
From: In the middle of Minnesota!
Year: 1999
Model: Cherokee
Engine: 4.0
1. Post EXACT codes here, not just a description. With OBDII, the devil is in the details.
2. Are you having to add any coolant to the reservoir? As already mentioned, get up to speed on the infamous 0331 cylinder head, which came with all 2000-2001 XJs
3. Consider taking it to a different shop/technician. This one sounds like he may be shotgunning it a bit.
2. Are you having to add any coolant to the reservoir? As already mentioned, get up to speed on the infamous 0331 cylinder head, which came with all 2000-2001 XJs
3. Consider taking it to a different shop/technician. This one sounds like he may be shotgunning it a bit.
02-08-2019 | 10:15 PM
#6
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,566
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
1. Post EXACT codes here, not just a description. With OBDII, the devil is in the details.
2. Are you having to add any coolant to the reservoir? As already mentioned, get up to speed on the infamous 0331 cylinder head, which came with all 2000-2001 XJs
3. Consider taking it to a different shop/technician. This one sounds like he may be shotgunning it a bit.
2. Are you having to add any coolant to the reservoir? As already mentioned, get up to speed on the infamous 0331 cylinder head, which came with all 2000-2001 XJs
3. Consider taking it to a different shop/technician. This one sounds like he may be shotgunning it a bit.
Agree on all of the above. Need exact code. could be as simple as a dirty/bad injector.
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