sclark309d
NAXJA Forum User
- Location
- North Bend, Wa.
Hello - new member Steve here from North Bend, Wa. with a question about my wife's 2000 Cherokee Classic.
She was driving home the other night, when it dies - no sputter, nuthin - just died as if the ignition was switched off (it wasn't).
When I reached her, I took a quick look. I heard no fuel pump (fp) noise when I turned the ignition switch on, so after towing it home, I shotgunned it and replaced pump.
I replaced the battery at that time as well, as I had a new one on hand, and was intending to anyway when I got a moment.
Now, when I switch it on, I hear the pump run then turn off after a couple seconds which seems normal to me. It has fuel at the test port on the rail, s I'm figuring if the fp WAS a problem, I don't think it is now, so I checked for spark.
Took the coil pack rail (is that the correct term?) off and took a plug out, laid it up on the valve cover where I could see it from the drivers door, jumpers threads to ground and turned it over. No spark.
Hooked a code scanner to it, got no codes. Maybe they were lost when I replaced the battery?
I've done a bit of reading on the internet today looking for thoughts and information, but I've not been able to find any articles on the ignition system itself. Lots of references to the crank position sensor and cam sensor, but I'd rather try a better approach than just replacing parts until I get the right one.
A description of the ignition or even a troubleshooting chart would help.
Could one of you point me in the right direction?
Thanks in advance
Steve
She was driving home the other night, when it dies - no sputter, nuthin - just died as if the ignition was switched off (it wasn't).
When I reached her, I took a quick look. I heard no fuel pump (fp) noise when I turned the ignition switch on, so after towing it home, I shotgunned it and replaced pump.
I replaced the battery at that time as well, as I had a new one on hand, and was intending to anyway when I got a moment.
Now, when I switch it on, I hear the pump run then turn off after a couple seconds which seems normal to me. It has fuel at the test port on the rail, s I'm figuring if the fp WAS a problem, I don't think it is now, so I checked for spark.
Took the coil pack rail (is that the correct term?) off and took a plug out, laid it up on the valve cover where I could see it from the drivers door, jumpers threads to ground and turned it over. No spark.
Hooked a code scanner to it, got no codes. Maybe they were lost when I replaced the battery?
I've done a bit of reading on the internet today looking for thoughts and information, but I've not been able to find any articles on the ignition system itself. Lots of references to the crank position sensor and cam sensor, but I'd rather try a better approach than just replacing parts until I get the right one.
A description of the ignition or even a troubleshooting chart would help.
Could one of you point me in the right direction?
Thanks in advance
Steve