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XJ Ask the Question Thread
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
Strokers wear faster internally, and $2k is at the very limit of my budget. I wasn't exactly planning on dropping money for a new motor less than two months after buying the Jeep, and I'm still paying on it.
Senior Member
Joined: May 2013
Posts: 541
Likes: 1
From: Vancouver
Year: 1998 and 1988
Model: Cherokee
Engine: 4.7
Looking for some input here. My YJ threw a rod on Friday, and I need a new motor. It's a '93 fuel injected 4.0L HO, so it ain't nothin' y'all ain't familiar with. My options are to drop in a used motor for around $600 or buy a reman for around $2k.
Can't decide if it's worth that much extra for a 3yr warranty.
Can't decide if it's worth that much extra for a 3yr warranty.
You can get a new $600 engine every year for 3 years and still be on top after your warranty is over.. Of course if you pay someone a few hundred bucks to put it in then it may be the same.... If your $600 motor fails..
If it has good compression numbers then I would go for it...
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
well, think about it. $600 vs $2000.
You can get a new $600 engine every year for 3 years and still be on top after your warranty is over.. Of course if you pay someone a few hundred bucks to put it in then it may be the same.... If your $600 motor fails..
If it has good compression numbers then I would go for it...
You can get a new $600 engine every year for 3 years and still be on top after your warranty is over.. Of course if you pay someone a few hundred bucks to put it in then it may be the same.... If your $600 motor fails..
If it has good compression numbers then I would go for it...
I'm thinking used. Talking it out helps.
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
It's a 4.0L. You're a Jeep guy. Why would you spend $2k on some **** you should spend on more important stuff? Like green paint for your steering stabilizer and K&N decals
Can't beat that logic! I wonder if it'll blow... I'd like to see pics of some guy trying to transport a 4.0L in the back of a Camaro lol
well, think about it. $600 vs $2000.
You can get a new $600 engine every year for 3 years and still be on top after your warranty is over.. Of course if you pay someone a few hundred bucks to put it in then it may be the same.... If your $600 motor fails..
If it has good compression numbers then I would go for it...
You can get a new $600 engine every year for 3 years and still be on top after your warranty is over.. Of course if you pay someone a few hundred bucks to put it in then it may be the same.... If your $600 motor fails..
If it has good compression numbers then I would go for it...
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Often the brakes just accumulate rust. Yes it can be fast, normally I don't notice any unless it's rained. Your brakes may need a good cleaning and everything checked properly.
Seasoned Member
Joined: Dec 2012
Posts: 451
Likes: 0
From: Middletown, Maryland
Year: 1998
Model: Cherokee
Engine: 4.0 I6
I love driving the day after a rain, cause then my brakes actually stop me in a reasonable amount of distance for once.
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
PLEASE bare with me, 'cause this is kind of a long story.
Alright... I'm pretty sure I've seen this question before, but I can't find it anywhere now. I think lack of sleep is getting to my search skills.
My jeep was running perfectly with no issues whatsoever. I took it out wheeling on saturday with a LOT of water crossings... I'm talking up over the rockers coming into the cab - okay for me that's deep. Anyway, the motor never sucked in water, never stalled, I never turned it off while it was in water and on the way home everything was driving like normal. I came home, parked it in the garage with the doors open and the dome fuse pulled to keep the interior lights from coming on.
The next day I started it up to pull it out of the garage and let it air out in the sun... started up instantly with no issues... just like it always did. Later on in the day started it up to move it back into the garage... again - no issues.
Then we come to Monday... started up fine, but the check engine light was on and the idle seems a little high when out of gear and wants to push the jeep when in gear... I put it into neutral when going down a hill and normally the rpm's will go down to 1100-1200 but this time they hovered around 1500-1600. "okay, whatever the O2 sensor probably went bad... it's a Bosch anyway" I thought.
The we come to today... I went to start it up to move it back out of the garage into the sunlight and rather than the starter just turning it over a couple of times and it starting right up - it sat there and cranked... and cranked...and cranked. I turned it off, then turned the key to run to listen for the fuel pump to spool up and it did... so I tried to start it again and got the same thing, but I noticed when I released the key back to the run position - the fuel pump spooled up again. So I let the pump spool up again, waited a second or two and turned the key to start and it finally cranked up after stuttering about it...
It's always been a crank-right-up type of motor so I'm really wondering what's up with it especially since it was fine on the way home and seemingly fine the next day.
Oh, I also noticed the temp guage hasn't been getting up to operating temp lately except when I was wheeling, and the electric fan is coming on before it ever gets to operating temp even with the A/C off... HELP!
Alright... I'm pretty sure I've seen this question before, but I can't find it anywhere now. I think lack of sleep is getting to my search skills.
My jeep was running perfectly with no issues whatsoever. I took it out wheeling on saturday with a LOT of water crossings... I'm talking up over the rockers coming into the cab - okay for me that's deep. Anyway, the motor never sucked in water, never stalled, I never turned it off while it was in water and on the way home everything was driving like normal. I came home, parked it in the garage with the doors open and the dome fuse pulled to keep the interior lights from coming on.
The next day I started it up to pull it out of the garage and let it air out in the sun... started up instantly with no issues... just like it always did. Later on in the day started it up to move it back into the garage... again - no issues.
Then we come to Monday... started up fine, but the check engine light was on and the idle seems a little high when out of gear and wants to push the jeep when in gear... I put it into neutral when going down a hill and normally the rpm's will go down to 1100-1200 but this time they hovered around 1500-1600. "okay, whatever the O2 sensor probably went bad... it's a Bosch anyway" I thought.
The we come to today... I went to start it up to move it back out of the garage into the sunlight and rather than the starter just turning it over a couple of times and it starting right up - it sat there and cranked... and cranked...and cranked. I turned it off, then turned the key to run to listen for the fuel pump to spool up and it did... so I tried to start it again and got the same thing, but I noticed when I released the key back to the run position - the fuel pump spooled up again. So I let the pump spool up again, waited a second or two and turned the key to start and it finally cranked up after stuttering about it...
It's always been a crank-right-up type of motor so I'm really wondering what's up with it especially since it was fine on the way home and seemingly fine the next day.
Oh, I also noticed the temp guage hasn't been getting up to operating temp lately except when I was wheeling, and the electric fan is coming on before it ever gets to operating temp even with the A/C off... HELP!
Senior Member
Joined: May 2013
Posts: 541
Likes: 1
From: Vancouver
Year: 1998 and 1988
Model: Cherokee
Engine: 4.7
PLEASE bare with me, 'cause this is kind of a long story.
Alright... I'm pretty sure I've seen this question before, but I can't find it anywhere now. I think lack of sleep is getting to my search skills.
My jeep was running perfectly with no issues whatsoever. I took it out wheeling on saturday with a LOT of water crossings... I'm talking up over the rockers coming into the cab - okay for me that's deep. Anyway, the motor never sucked in water, never stalled, I never turned it off while it was in water and on the way home everything was driving like normal. I came home, parked it in the garage with the doors open and the dome fuse pulled to keep the interior lights from coming on.
The next day I started it up to pull it out of the garage and let it air out in the sun... started up instantly with no issues... just like it always did. Later on in the day started it up to move it back into the garage... again - no issues.
Then we come to Monday... started up fine, but the check engine light was on and the idle seems a little high when out of gear and wants to push the jeep when in gear... I put it into neutral when going down a hill and normally the rpm's will go down to 1100-1200 but this time they hovered around 1500-1600. "okay, whatever the O2 sensor probably went bad... it's a Bosch anyway" I thought.
The we come to today... I went to start it up to move it back out of the garage into the sunlight and rather than the starter just turning it over a couple of times and it starting right up - it sat there and cranked... and cranked...and cranked. I turned it off, then turned the key to run to listen for the fuel pump to spool up and it did... so I tried to start it again and got the same thing, but I noticed when I released the key back to the run position - the fuel pump spooled up again. So I let the pump spool up again, waited a second or two and turned the key to start and it finally cranked up after stuttering about it...
It's always been a crank-right-up type of motor so I'm really wondering what's up with it especially since it was fine on the way home and seemingly fine the next day.
Oh, I also noticed the temp guage hasn't been getting up to operating temp lately except when I was wheeling, and the electric fan is coming on before it ever gets to operating temp even with the A/C off... HELP!
Alright... I'm pretty sure I've seen this question before, but I can't find it anywhere now. I think lack of sleep is getting to my search skills.
My jeep was running perfectly with no issues whatsoever. I took it out wheeling on saturday with a LOT of water crossings... I'm talking up over the rockers coming into the cab - okay for me that's deep. Anyway, the motor never sucked in water, never stalled, I never turned it off while it was in water and on the way home everything was driving like normal. I came home, parked it in the garage with the doors open and the dome fuse pulled to keep the interior lights from coming on.
The next day I started it up to pull it out of the garage and let it air out in the sun... started up instantly with no issues... just like it always did. Later on in the day started it up to move it back into the garage... again - no issues.
Then we come to Monday... started up fine, but the check engine light was on and the idle seems a little high when out of gear and wants to push the jeep when in gear... I put it into neutral when going down a hill and normally the rpm's will go down to 1100-1200 but this time they hovered around 1500-1600. "okay, whatever the O2 sensor probably went bad... it's a Bosch anyway" I thought.
The we come to today... I went to start it up to move it back out of the garage into the sunlight and rather than the starter just turning it over a couple of times and it starting right up - it sat there and cranked... and cranked...and cranked. I turned it off, then turned the key to run to listen for the fuel pump to spool up and it did... so I tried to start it again and got the same thing, but I noticed when I released the key back to the run position - the fuel pump spooled up again. So I let the pump spool up again, waited a second or two and turned the key to start and it finally cranked up after stuttering about it...
It's always been a crank-right-up type of motor so I'm really wondering what's up with it especially since it was fine on the way home and seemingly fine the next day.
Oh, I also noticed the temp guage hasn't been getting up to operating temp lately except when I was wheeling, and the electric fan is coming on before it ever gets to operating temp even with the A/C off... HELP!
How are your fluid levels? All of them. Any contamination of the oils? It didn't stall, but that doesn't mean crap didn't get into it.
Water may have splashed everywhere inside. I know all connectors should be waterproof but water may have seeped in overnight and causing shorts. check your distributor cap. water can get in there as well and sit where the cam position sensor is.
I would check the relays under the hood and everything around them. Your best friend would be pressurized air anywhere water could sit.
Check those out and get back.
good luck
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
It is a long winded question but we are still missing some information.
How are your fluid levels? All of them. Any contamination of the oils? It didn't stall, but that doesn't mean crap didn't get into it.
Water may have splashed everywhere inside. I know all connectors should be waterproof but water may have seeped in overnight and causing shorts. check your distributor cap. water can get in there as well and sit where the cam position sensor is.
I would check the relays under the hood and everything around them. Your best friend would be pressurized air anywhere water could sit.
Check those out and get back.
good luck
How are your fluid levels? All of them. Any contamination of the oils? It didn't stall, but that doesn't mean crap didn't get into it.
Water may have splashed everywhere inside. I know all connectors should be waterproof but water may have seeped in overnight and causing shorts. check your distributor cap. water can get in there as well and sit where the cam position sensor is.
I would check the relays under the hood and everything around them. Your best friend would be pressurized air anywhere water could sit.
Check those out and get back.
good luck
CF Veteran
Joined: Sep 2010
Posts: 12,692
Likes: 6
From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
PLEASE bare with me, 'cause this is kind of a long story.
Alright... I'm pretty sure I've seen this question before, but I can't find it anywhere now. I think lack of sleep is getting to my search skills.
My jeep was running perfectly with no issues whatsoever. I took it out wheeling on saturday with a LOT of water crossings... I'm talking up over the rockers coming into the cab - okay for me that's deep. Anyway, the motor never sucked in water, never stalled, I never turned it off while it was in water and on the way home everything was driving like normal. I came home, parked it in the garage with the doors open and the dome fuse pulled to keep the interior lights from coming on.
The next day I started it up to pull it out of the garage and let it air out in the sun... started up instantly with no issues... just like it always did. Later on in the day started it up to move it back into the garage... again - no issues.
Then we come to Monday... started up fine, but the check engine light was on and the idle seems a little high when out of gear and wants to push the jeep when in gear... I put it into neutral when going down a hill and normally the rpm's will go down to 1100-1200 but this time they hovered around 1500-1600. "okay, whatever the O2 sensor probably went bad... it's a Bosch anyway" I thought.
The we come to today... I went to start it up to move it back out of the garage into the sunlight and rather than the starter just turning it over a couple of times and it starting right up - it sat there and cranked... and cranked...and cranked. I turned it off, then turned the key to run to listen for the fuel pump to spool up and it did... so I tried to start it again and got the same thing, but I noticed when I released the key back to the run position - the fuel pump spooled up again. So I let the pump spool up again, waited a second or two and turned the key to start and it finally cranked up after stuttering about it...
It's always been a crank-right-up type of motor so I'm really wondering what's up with it especially since it was fine on the way home and seemingly fine the next day.
Oh, I also noticed the temp guage hasn't been getting up to operating temp lately except when I was wheeling, and the electric fan is coming on before it ever gets to operating temp even with the A/C off... HELP!
Alright... I'm pretty sure I've seen this question before, but I can't find it anywhere now. I think lack of sleep is getting to my search skills.
My jeep was running perfectly with no issues whatsoever. I took it out wheeling on saturday with a LOT of water crossings... I'm talking up over the rockers coming into the cab - okay for me that's deep. Anyway, the motor never sucked in water, never stalled, I never turned it off while it was in water and on the way home everything was driving like normal. I came home, parked it in the garage with the doors open and the dome fuse pulled to keep the interior lights from coming on.
The next day I started it up to pull it out of the garage and let it air out in the sun... started up instantly with no issues... just like it always did. Later on in the day started it up to move it back into the garage... again - no issues.
Then we come to Monday... started up fine, but the check engine light was on and the idle seems a little high when out of gear and wants to push the jeep when in gear... I put it into neutral when going down a hill and normally the rpm's will go down to 1100-1200 but this time they hovered around 1500-1600. "okay, whatever the O2 sensor probably went bad... it's a Bosch anyway" I thought.
The we come to today... I went to start it up to move it back out of the garage into the sunlight and rather than the starter just turning it over a couple of times and it starting right up - it sat there and cranked... and cranked...and cranked. I turned it off, then turned the key to run to listen for the fuel pump to spool up and it did... so I tried to start it again and got the same thing, but I noticed when I released the key back to the run position - the fuel pump spooled up again. So I let the pump spool up again, waited a second or two and turned the key to start and it finally cranked up after stuttering about it...
It's always been a crank-right-up type of motor so I'm really wondering what's up with it especially since it was fine on the way home and seemingly fine the next day.
Oh, I also noticed the temp guage hasn't been getting up to operating temp lately except when I was wheeling, and the electric fan is coming on before it ever gets to operating temp even with the A/C off... HELP!
Although im curious about your temp guage not getting up to 210. May be staying open the thermostat
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
It's a 4.0L. You're a Jeep guy. Why would you spend $2k on some **** you should spend on more important stuff? Like green paint for your steering stabilizer and K&N decals
Can't beat that logic! I wonder if it'll blow... I'd like to see pics of some guy trying to transport a 4.0L in the back of a Camaro lol
Can't beat that logic! I wonder if it'll blow... I'd like to see pics of some guy trying to transport a 4.0L in the back of a Camaro lol
Even better, I'm borrowing a friend's '00 VW Jetta TDI sedan.
CF Veteran
Joined: Apr 2011
Posts: 4,825
Likes: 2
From: Indianapolis
Year: '99 and '91
Model: Cherokee
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
They can do some serious towing though. Guy hauling a 1700 lb 6v53T, he still got 38 MPG...

x90783945728934
Meeeehhh it's a YJ. How good of a shape could it possibly be in? Engine to match the Jeep

x90783945728934
Meeeehhh it's a YJ. How good of a shape could it possibly be in? Engine to match the Jeep




