bulfo4
NAXJA Forum User
- Location
- New mexico
1996 XJ with Golen 4.6L stroker, Auto, don't recall on transfer case
Hi, we've been having trouble getting my XJ back to running for a while, but it's been in "crank, no start" for a while.
We've done a LOT of replacements to the stuff with lifetime warranties (sensors, distributor, plug wires, ignition coil, etc). We've also changed out the fuel pump, and the fuel pressure regulator. It gets fuel to the rail.
We've replaced the PCM as well.
Using a spark plug light, no spark from ignition coil to distributor.
Seems like that means the Crank Position Sensor isn't telling the PCM when to send sparks, which over and over seems to be the culprit.
From the plug that goes TO the CPS, it reads 13v ground, and 5.9v for the send signal.
We had two extra CPS's sitting around, and tested those and the one that was in there, all of which showed some resistance on the two pins that are supposed to have resistance (can't recall how much though).
On a hunch, I took one of them back and warranty replaced it from Autozone, and IT STARTED FINALLY!
Drove it around for a day and a half trying to figure out (***other problem below***).
Then, all of a sudden, cuts out completely, gives codes P0201, P0202 for Open circuit on injectors 1 & 2. I cleared the codes and they never came back, but it was back to "crank and no start".
I've heard, BTW, that the Autozone ones can be bad compared to MOPAR and I'm 100% up for getting a MOPAR one, but before I do that...
What makes a CPS fail? I've heard physical damage to the unit by the wheel, as well as I'm sure it can get electrically fried somehow. Anybody have any insights or suggestions? What should*we check or look for?
Thank you!
Tom
***The Other Problem***
For about the last 3 years the XJ has been unreliably dying while driving. Usually it'll sputter and falter a little bit, and if I give it some gas it comes back, but sometimes it doesn't and I'm on the side of the road. Other times it quits all together. Every time though, after a few minutes, maybe 20 or so, it'll start back up and keep running. The weird thing is it does this sometimes after 3-4 minutes, and sometimes an hour and a half. Sometimes while driving, and sometimes while sitting in the driveway. We've moved every wire we can think of, flushed the gas, jumped up and down on it and torqued it around like going over bumps, had it tilted uphill and downhill and level.*
Plus we've replaced:
Whole Distributor
Plug wires
Spark Plugs
CPS (multiple times)
Ignition Coil
MAP sensor
Idle air sensor
Fuel Pump
Fuel Filter
Fuel Pressure Regulator
PCM
Ignition Switch
Every relay we could find
and probably other stuff I don't recall off hand.
But we have to have it running first, so I need to fix "crank, no start" first.*
Thanks on this one too.
Hi, we've been having trouble getting my XJ back to running for a while, but it's been in "crank, no start" for a while.
We've done a LOT of replacements to the stuff with lifetime warranties (sensors, distributor, plug wires, ignition coil, etc). We've also changed out the fuel pump, and the fuel pressure regulator. It gets fuel to the rail.
We've replaced the PCM as well.
Using a spark plug light, no spark from ignition coil to distributor.
Seems like that means the Crank Position Sensor isn't telling the PCM when to send sparks, which over and over seems to be the culprit.
From the plug that goes TO the CPS, it reads 13v ground, and 5.9v for the send signal.
We had two extra CPS's sitting around, and tested those and the one that was in there, all of which showed some resistance on the two pins that are supposed to have resistance (can't recall how much though).
On a hunch, I took one of them back and warranty replaced it from Autozone, and IT STARTED FINALLY!
Drove it around for a day and a half trying to figure out (***other problem below***).
Then, all of a sudden, cuts out completely, gives codes P0201, P0202 for Open circuit on injectors 1 & 2. I cleared the codes and they never came back, but it was back to "crank and no start".
I've heard, BTW, that the Autozone ones can be bad compared to MOPAR and I'm 100% up for getting a MOPAR one, but before I do that...
What makes a CPS fail? I've heard physical damage to the unit by the wheel, as well as I'm sure it can get electrically fried somehow. Anybody have any insights or suggestions? What should*we check or look for?
Thank you!
Tom
***The Other Problem***
For about the last 3 years the XJ has been unreliably dying while driving. Usually it'll sputter and falter a little bit, and if I give it some gas it comes back, but sometimes it doesn't and I'm on the side of the road. Other times it quits all together. Every time though, after a few minutes, maybe 20 or so, it'll start back up and keep running. The weird thing is it does this sometimes after 3-4 minutes, and sometimes an hour and a half. Sometimes while driving, and sometimes while sitting in the driveway. We've moved every wire we can think of, flushed the gas, jumped up and down on it and torqued it around like going over bumps, had it tilted uphill and downhill and level.*
Plus we've replaced:
Whole Distributor
Plug wires
Spark Plugs
CPS (multiple times)
Ignition Coil
MAP sensor
Idle air sensor
Fuel Pump
Fuel Filter
Fuel Pressure Regulator
PCM
Ignition Switch
Every relay we could find
and probably other stuff I don't recall off hand.
But we have to have it running first, so I need to fix "crank, no start" first.*
Thanks on this one too.