Jeep will not start
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I didn't believe he tested the CPS (which he didn't). He ended up saying it was just swapped in to a different vehicle and a voltage test wasn't done. If the other vehicle had better wiring, cleaner contact points, etc then a weak CPS would be more likely to work on theirs than on his. Without an actual voltage test we don't know for sure if it is actually at 0.5v(?) or much lower.
But after he said he swapped it to test and it looked fine I stopped asking him to look at it.
Hopefully he gets it fixed up and lets us know what the issue is.
But after he said he swapped it to test and it looked fine I stopped asking him to look at it.

Hopefully he gets it fixed up and lets us know what the issue is.
I'm always anxious to help but this is wearing me out.
CF Veteran
Joined: Feb 2013
Posts: 1,267
Likes: 1
From: Franksville, Wi
Year: 1995
Model: Cherokee
Engine: 4.0
I think his test ended up being just swapping it to a different vehicle. I haven't seen any indication he got a voltage reading off of it.
He can confirm what test he did though whenever he pops on next.
He can confirm what test he did though whenever he pops on next.
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
If so, that's not a good test. The CPS must be tested with a meter set on AC volts, unplugged, and installed on the vehicle with the issues.
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Correct it did start the other xj the one from that xj did not start his .
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Thread Starter
Junior Member
Joined: Jan 2014
Posts: 67
Likes: 0
Year: 1987
Model: Cherokee
Engine: 4.0L Inline 6cyl
Alright I am gonna list what I did today to get spark (of which I did not get). But before you all go saying I didn't listen or look at stuff you must know that I have had no connection to the internet all day. Wifi fried and had to set-up a new one. Alright on to what I did....
* Pulled the CPS and cleaned around the area and put it back and tightened.
* Replaced Ignition coil to distributor
* Pulled Distributor cap to checked for damage or corrosion (none)
* Checked fuses under the drivers side AND next to ignition coil
What I noticed while doing this...
* There is a set of wires that runs from the starter up to the Distributor that from there attaches to a plug in under the Ignition Coil. Could this be my problem?
* My alternator doesn't look as "new" as the owner before (my cousin) me said. Could this be it?
* The Jeep stopped running after I gave it some gas (while it was dying, when clutch was engaged) and a large cloud of Black smoke exited my exhaust. I then had to use the starter to back up my jeep in reverse due to weather and myself being alone. Could I have fried the wires that run as aforementioned. I know my O2 Sensor is old and has never been replaced. I have heard conflicting answer of it no giving spark and it doesn't matter if the O2 sensor is bad. Could this be a problem?
* I had my dad stop down and help me. We tested the CPS and it came up as 0.6v. I then called my friend who said the same when we tested it. I made sure it was tight.
That's what I did today while waiting for my internet to be repaired.
* Pulled the CPS and cleaned around the area and put it back and tightened.
* Replaced Ignition coil to distributor
* Pulled Distributor cap to checked for damage or corrosion (none)
* Checked fuses under the drivers side AND next to ignition coil
What I noticed while doing this...
* There is a set of wires that runs from the starter up to the Distributor that from there attaches to a plug in under the Ignition Coil. Could this be my problem?
* My alternator doesn't look as "new" as the owner before (my cousin) me said. Could this be it?
* The Jeep stopped running after I gave it some gas (while it was dying, when clutch was engaged) and a large cloud of Black smoke exited my exhaust. I then had to use the starter to back up my jeep in reverse due to weather and myself being alone. Could I have fried the wires that run as aforementioned. I know my O2 Sensor is old and has never been replaced. I have heard conflicting answer of it no giving spark and it doesn't matter if the O2 sensor is bad. Could this be a problem?
* I had my dad stop down and help me. We tested the CPS and it came up as 0.6v. I then called my friend who said the same when we tested it. I made sure it was tight.
That's what I did today while waiting for my internet to be repaired.
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Not being there makes it very hard to diag issue last night you said it sputtered when you were installing the jumper wire If this was mine id be consentrating on the wiring inthat area. having some one to turn to start wile all plugs/wiring in that area were address .
Thread Starter
Junior Member
Joined: Jan 2014
Posts: 67
Likes: 0
Year: 1987
Model: Cherokee
Engine: 4.0L Inline 6cyl
Well there's a red wire there with a plug in on it that's not plugged it. Also there was a blue wire that was supposed to be connected across the motor. Close to the fire wall. Other than that...The negative cable is charred and exposed. Would that cause a crank no start? And those wires I mentioned in the last post.
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Well there's a red wire there with a plug in on it that's not plugged it. Also there was a blue wire that was supposed to be connected across the motor. Close to the fire wall. Other than that...The negative cable is charred and exposed. Would that cause a crank no start? And those wires I mentioned in the last post.
Thread Starter
Junior Member
Joined: Jan 2014
Posts: 67
Likes: 0
Year: 1987
Model: Cherokee
Engine: 4.0L Inline 6cyl


