Wierd no start problem
#16
Member
Thread Starter
Join Date: Jun 2011
Location: Brentwood, CA
Posts: 123
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1992
Model: Cherokee
Engine: 4.0L I6 MPI "Power Tech HO"
Originally Posted by Cherockee
Things to look for:
Dark Green/Orange wire going to the coil has 12V when the ignition key is turned on.
Orange wire going to both the crank and cam sensors have 5V for the first few second when the key is turned to start/crank
Continuity between ground and the Brown/Yellow wires for each sensor
The sensor output wires (tan/yellow for cam and grey/black for crank) will show pulses on them when the engine turns over. Probably hard to see this with a digital meter, analog works best for this. Power for the coil comes from fues 20 in the PDC and power for the sensor comes from connector 1 of the PCM, pin #17.
I copied this from a reply I made to someone else having simular symptoms. If you can't find your answer here you may want to replace your PCM/ECM
Dark Green/Orange wire going to the coil has 12V when the ignition key is turned on.
Orange wire going to both the crank and cam sensors have 5V for the first few second when the key is turned to start/crank
Continuity between ground and the Brown/Yellow wires for each sensor
The sensor output wires (tan/yellow for cam and grey/black for crank) will show pulses on them when the engine turns over. Probably hard to see this with a digital meter, analog works best for this. Power for the coil comes from fues 20 in the PDC and power for the sensor comes from connector 1 of the PCM, pin #17.
I copied this from a reply I made to someone else having simular symptoms. If you can't find your answer here you may want to replace your PCM/ECM
#18
Member
Thread Starter
Join Date: Jun 2011
Location: Brentwood, CA
Posts: 123
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1992
Model: Cherokee
Engine: 4.0L I6 MPI "Power Tech HO"
So after checking all listed above I found no faults in those areas. I decided to check the fuses in the engine bay again and found that the mini 20amp for engine control 2 was blown. I replaced it and decided to take my battery out of my Tacoma and use it in the XJ. My battery I found was toast probably from jumping it so many times during this last month. It cranked over smoother and finally started up however I found the TPS fault code flashing when I checked the codes because it was wanting to stall out under light acceleration. In all, I don't know exactly what the issue was.... But after replacing: ignition coil, plug wires, dist cap, fuel filter, fuel pump, battery, and CPS, and TPS it running great now. There was fault code 41 that came up as well but I don't think my alternator is bad. It's putting out 14.5v so I guess I'll know in a few days if it's charging my battery. Thanks for all the input everyone!
Thread
Thread Starter
Forum
Replies
Last Post
seansr
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
12
11-15-2022 06:08 AM
Jose Calderon
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
17
09-17-2015 08:57 PM
DanO55
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
1
08-28-2015 07:16 PM
petejeep95
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
4
08-22-2015 11:39 AM
CCKen
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
3
08-20-2015 08:07 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)