labourgeoisie
NAXJA Forum User
- Location
- Baton Rouge
Hey, y'all!
I'd like a little help and advice as I'm pretty out of my element here. I've got a 2000 Cherokee Sport 4.0 4x4, auto trans, all stock. If there's any info else you need let me know. The past few months have been rough on the Jeep starting with the power steering pump exploding and being replaced. Everything has been fine for the past few months with the exception of the heat soak p0303 I get every now and then, but overall no real issues.
Jeep had been running great all week. Saturday morning I went to leave and I've been plagued by the no start issue.
Here's what I know:
When I turn the key it'll crank but won't start. Belt engages, stays powerful. Have recharged battery and everything.
When turned on, you can hear the fuel pump engage if you're standing at the back of the Jeep. Likewise, when I press down on the valve on the fuel rail I get spray. My tank was low (gas light was on) but I put extra in it, just in case. Tried starter fluid. It gets a little closer to starting up but ultimately sputters out and dies.
Spark plugs were put in new a couple of years ago. Took them out and cleaned them up. #3 was pretty dirty (assuming because of heat soak?) but ultimately they all look fine. Have had serious frustration removing the connector on the inline ignition coil rail so haven't actually hooked it up to a multimeter--tester ordered on Amazon tonight to verify I'm getting spark.
I have tested/switched ASD relay and fuse to no difference.
I have traced what I believe to be the Crankshaft Position Sensor, unplugged, and replugged it in to no difference. My gauges all work and I am not getting the NO BUS issue either. To access this, I found it was easiest to slide under the driver's side door. The connector I unplugged did have three prongs, so I'm thinking it was correct, but I could have been wrong?
I have a bluetooth code reader. It claims to connect to the ECU but was not reading any codes. After we unplugged a bunch of sensors on top of the throttle body I started to get a p0122 but I believe it's unrelated as it hadn't been triggered before and doesn't seem to cause a no start as far as my research can tell?
Currently, I'm at a loss of what to try next possibly until that tester comes in and I can totally confirm I'm getting spark. Right now I'm under the impression that since starter fluid helps I may have at least intermittent spark? Which suggests it's not the crankshaft position sensor but maybe camshaft?
I have tried to start the jeep multiple times throughout the day and at different temperatures, but it doesn't make a difference. Prior to this, I have not had any stalling or weak starts (with the exception of few heat soak issues but not for a few months).
Just looking for advice or where to go next. This jeep is the first vehicle I ever do any real work under the hood on so I'm relatively inexperienced.
In advance, thanks for all y'alls help!
I'd like a little help and advice as I'm pretty out of my element here. I've got a 2000 Cherokee Sport 4.0 4x4, auto trans, all stock. If there's any info else you need let me know. The past few months have been rough on the Jeep starting with the power steering pump exploding and being replaced. Everything has been fine for the past few months with the exception of the heat soak p0303 I get every now and then, but overall no real issues.
Jeep had been running great all week. Saturday morning I went to leave and I've been plagued by the no start issue.
Here's what I know:
When I turn the key it'll crank but won't start. Belt engages, stays powerful. Have recharged battery and everything.
When turned on, you can hear the fuel pump engage if you're standing at the back of the Jeep. Likewise, when I press down on the valve on the fuel rail I get spray. My tank was low (gas light was on) but I put extra in it, just in case. Tried starter fluid. It gets a little closer to starting up but ultimately sputters out and dies.
Spark plugs were put in new a couple of years ago. Took them out and cleaned them up. #3 was pretty dirty (assuming because of heat soak?) but ultimately they all look fine. Have had serious frustration removing the connector on the inline ignition coil rail so haven't actually hooked it up to a multimeter--tester ordered on Amazon tonight to verify I'm getting spark.
I have tested/switched ASD relay and fuse to no difference.
I have traced what I believe to be the Crankshaft Position Sensor, unplugged, and replugged it in to no difference. My gauges all work and I am not getting the NO BUS issue either. To access this, I found it was easiest to slide under the driver's side door. The connector I unplugged did have three prongs, so I'm thinking it was correct, but I could have been wrong?
I have a bluetooth code reader. It claims to connect to the ECU but was not reading any codes. After we unplugged a bunch of sensors on top of the throttle body I started to get a p0122 but I believe it's unrelated as it hadn't been triggered before and doesn't seem to cause a no start as far as my research can tell?
Currently, I'm at a loss of what to try next possibly until that tester comes in and I can totally confirm I'm getting spark. Right now I'm under the impression that since starter fluid helps I may have at least intermittent spark? Which suggests it's not the crankshaft position sensor but maybe camshaft?
I have tried to start the jeep multiple times throughout the day and at different temperatures, but it doesn't make a difference. Prior to this, I have not had any stalling or weak starts (with the exception of few heat soak issues but not for a few months).
Just looking for advice or where to go next. This jeep is the first vehicle I ever do any real work under the hood on so I'm relatively inexperienced.
In advance, thanks for all y'alls help!