CPS or MAP or Fuel Pump?
#1
Newbie
Thread Starter
Join Date: Feb 2015
Posts: 18
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2000
Model: Cherokee
Engine: 4.0L
![Default](https://www.cherokeeforum.com/images/icons/icon1.gif)
So I am having some issues with my 2000 XJ. It is hard to get started up. Usually takes a couple key turns to fire up. Once started it drives fine...until I turn on the AC. Then it dies and won't fire up again unless it sits for a little while. Is that the crankshaft position sensor? MAP sensor?
#3
Newbie
Thread Starter
Join Date: Feb 2015
Posts: 18
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2000
Model: Cherokee
Engine: 4.0L
![Default](https://www.cherokeeforum.com/images/icons/icon1.gif)
Now I can't get it started at all. Checked the fuel pressure and it was good. Battery is new and was good. It tries to crank over but it just doesn't. Any thoughts?
#6
Member
Join Date: Jan 2014
Location: Traverse City, MI
Posts: 179
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1996
Model: Cherokee
Engine: 4.0L
![Default](https://www.cherokeeforum.com/images/icons/icon1.gif)
Next thing I would check, is if you have spark. There's a bunch of detailed write ups on how to do it, so you can just search the forum or google or something, but basically you want to take one of the plug wires off one of the plugs, stick something metal in there... I use a screw driver... then have someone crank the engine while the screw driver is sitting close to the block, and see if you have a strong, snappy, blue spark.
If you have a spark but it not strong, that could keep it from starting. Not having spark would certainly keep it from starting.
If you have good fuel pressure and good spark, then next I would check compression.
If you have a spark but it not strong, that could keep it from starting. Not having spark would certainly keep it from starting.
If you have good fuel pressure and good spark, then next I would check compression.
Trending Topics
#9
Newbie
Thread Starter
Join Date: Feb 2015
Posts: 18
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2000
Model: Cherokee
Engine: 4.0L
![Default](https://www.cherokeeforum.com/images/icons/icon1.gif)
It cranks over normal like it did when it ran perfect. I don't know if that is fast or slow. There is no check engine light on. I read some tests on checking the spark on Jeeps without coil packs, but I haven't seen anything for a 2000 or 2001.
Thanks for your help!
Thanks for your help!
#10
Seasoned Member
Join Date: Aug 2009
Location: Long Island NY
Posts: 460
Likes: 0
Received 2 Likes
on
2 Posts
Year: 1989
Model: Cherokee
Engine: 4.0
![Default](https://www.cherokeeforum.com/images/icons/icon1.gif)
Then I would get a can of starting fluid remove the air filter hose going into the throttle body, spray a 2-3 second blast directly into the throttle body put the hose back on and see if it fires up for a few seconds. this determines if it is a ignition problem or fuel problem.
I will have to say, you are having the Exact same problem as I did when my CPS went bad. it started every time when cold but it had to crank over a few times before it would start . this went on for a week or so then one morning it just would not fire up anymore. I replaced the CPS and no more problems
I will have to say, you are having the Exact same problem as I did when my CPS went bad. it started every time when cold but it had to crank over a few times before it would start . this went on for a week or so then one morning it just would not fire up anymore. I replaced the CPS and no more problems
Last edited by TheGreatGazoo; 02-08-2015 at 07:16 PM.
#11
Newbie
Thread Starter
Join Date: Feb 2015
Posts: 18
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2000
Model: Cherokee
Engine: 4.0L
![Default](https://www.cherokeeforum.com/images/icons/icon1.gif)
I will try the spray to help eliminate that. I just want to figure this out. It would suck to have it towed to a shop. Thanks again! If anyone thinks of anything else let me know. Kinda desperate here.
Thread
Thread Starter
Forum
Replies
Last Post
Tcq192
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
10-23-2015 09:25 AM
dock2778
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
3
09-08-2015 07:04 PM
Chick-N-Picker
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
09-07-2015 07:56 PM
Chick-N-Picker
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
1
09-06-2015 03:34 PM
Ricardo Siqueiros
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
09-03-2015 09:17 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)