Sep 21, 2015, 03:49 PM
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XJ Ask the Question Thread
CF Veteran
Joined: Aug 2015
Posts: 1,226
Likes: 11
From: Laurium, MI
Year: 1999
Model: Cherokee(XJ)
Engine: 4.0L
Advice needed.. I have a 98 4.0 with 168k on it, having a cylinder 1 misfire.
Prior to this:
1. CPS went out- replaced w/out issue
2. Smog shop ripped off a vacuum line on the top of the manifold - fixed torn boot/cleared CEL no issue
3. Leaky Trans Cooler Line - Fixed
4. Replaced motor and tranny mounts.
After the mounts I got a CEL P301
1. Switched injector 1 & 3 code stayed with cylinder 1
2. Replaced wires/plugs/cap/rotor - no change
3. Took it in for a compression and leak down test - all very good - no change
4. Used BG 44k in the gas tank and have driven it around 600 miles (2 tanks of gas). Still having the misfire esp when cold.
How long before I see results with the BG 44k? Should I retreat? Any suggestions or advice on how to proceed is greatly appreciated.
Prior to this:
1. CPS went out- replaced w/out issue
2. Smog shop ripped off a vacuum line on the top of the manifold - fixed torn boot/cleared CEL no issue
3. Leaky Trans Cooler Line - Fixed
4. Replaced motor and tranny mounts.
After the mounts I got a CEL P301
1. Switched injector 1 & 3 code stayed with cylinder 1
2. Replaced wires/plugs/cap/rotor - no change
3. Took it in for a compression and leak down test - all very good - no change
4. Used BG 44k in the gas tank and have driven it around 600 miles (2 tanks of gas). Still having the misfire esp when cold.
How long before I see results with the BG 44k? Should I retreat? Any suggestions or advice on how to proceed is greatly appreciated.
Edit: The PO on mine had butt connectors on the wiring for injector 1...I promptly replaced with solder and heatshrink. None of that nonsense right?
Last edited by rcguymike; Mar 9, 2016 at 11:41 AM.
Junior Member
Joined: Jun 2009
Posts: 48
Likes: 5
From: Auburn, Ca
Year: 1998
Model: Cherokee
Engine: 4.0L
Junior Member
Joined: Jun 2009
Posts: 48
Likes: 5
From: Auburn, Ca
Year: 1998
Model: Cherokee
Engine: 4.0L
And I had a shop do the compression and leak down tests. And no nonsense with the wires.
Last edited by jpluvr4life; Mar 9, 2016 at 11:57 AM.
Junior Member
Joined: Jun 2009
Posts: 48
Likes: 5
From: Auburn, Ca
Year: 1998
Model: Cherokee
Engine: 4.0L
The wires look fine and definitely not pinched or showing signs that they were. The ground wire from the firewall to the valve cover is mad dirty with oil from my leaky valve cover. I was going to clean the engine and replace my valve cover just prior to this misfire...
CF Veteran
Joined: Jan 2013
Posts: 19,219
Likes: 45
From: west chester, pa
Year: 1999
Engine: 4.0
The wires look fine and definitely not pinched or showing signs that they were. The ground wire from the firewall to the valve cover is mad dirty with oil from my leaky valve cover. I was going to clean the engine and replace my valve cover just prior to this misfire...
No, I don't lick fish.
Joined: Mar 2011
Posts: 11,169
Likes: 26
From: Northern Kentucky
Year: 1999
Model: Cherokee (XJ)
Engine: 4.0
I can spot them from far away driving down the roadway now.
...and then have to fight the urge not to run them off the roadway and steal their axle.
Moderator CF K9-unit
Joined: Apr 2012
Posts: 5,842
Likes: 12
From: Alaska
Year: 2000 sport
Model: Cherokee (XJ)
Engine: New 4.0l from s&j engines
If I set the main spool drag to 12,500lbs and the drag starts to pull spool at 10,000lbs.
Could that be a clue the spool drag brakes are in need of replacing,
or is my gauge off and Im really set at 10 even tho it says set to 12,500. Im thinking brakes on the main spool.
Opps sorry wrong forum...lol
Could that be a clue the spool drag brakes are in need of replacing,
or is my gauge off and Im really set at 10 even tho it says set to 12,500. Im thinking brakes on the main spool.
Opps sorry wrong forum...lol
Last edited by Dumajones; Mar 10, 2016 at 01:37 PM.
::CF Administrator::
Joined: Feb 2011
Posts: 14,479
Likes: 805
From: Blunt, South Dakota
Year: 97
Model: Cherokee (XJ)
Engine: 4.6 stroker
If I set the main spool drag to 12,500lbs and the drag starts to pull spool at 10,000lbs.
Could that be a clue the spool drag breaks are in need of replacing,
or is my gauge off and Im really set at 10 even tho it says set to 12,500. Im thinking breaks on the main spool.
Opps sorry wrong forum...lol
Could that be a clue the spool drag breaks are in need of replacing,
or is my gauge off and Im really set at 10 even tho it says set to 12,500. Im thinking breaks on the main spool.
Opps sorry wrong forum...lol
Moderator CF K9-unit
Joined: Apr 2012
Posts: 5,842
Likes: 12
From: Alaska
Year: 2000 sport
Model: Cherokee (XJ)
Engine: New 4.0l from s&j engines
CF ADMIN
Joined: Sep 2010
Posts: 34,088
Likes: 257
From: Lantana, Fl
Year: 1996
Model: Cherokee (XJ)
Engine: 4.Slow
::CF Administrator::
Joined: Feb 2011
Posts: 14,479
Likes: 805
From: Blunt, South Dakota
Year: 97
Model: Cherokee (XJ)
Engine: 4.6 stroker
LMAO...glad to hear you're doing good. Started my build's next phase...go check it out.
Moderator CF K9-unit
Joined: Apr 2012
Posts: 5,842
Likes: 12
From: Alaska
Year: 2000 sport
Model: Cherokee (XJ)
Engine: New 4.0l from s&j engines
Good to see Ya still kicking around...
I sub it... I have to run.. I was just stopping in too see whats going on with you guys. Me Im doing great. This season of fishing is going to be a rush...
Ok Cory is saying come on lets go.. I have to run.. Sending all you guys good thoughts... Peace
Ok Cory is saying come on lets go.. I have to run.. Sending all you guys good thoughts... Peace