Died on Highway, sounds like CPS with a twist
#11
I dealt with the same issue on and off for a few months this past year. Drive me absolutely crazy. Replaced a ton of stuff, nothing would fix it long term.
Turned out to be the fuse box under the driver side dash. Completely intermittent, difficult to diagnose, but replacing it with another used one has totally fixed my no start/dying-while-driving issues. Thank GOD.
best of luck!!
Turned out to be the fuse box under the driver side dash. Completely intermittent, difficult to diagnose, but replacing it with another used one has totally fixed my no start/dying-while-driving issues. Thank GOD.
best of luck!!
#12
Timing chain has not been replaced to my knowledge.
I'll check for compression today. Would the timing chain go quietly? When it died at-speed it was so quiet I hadn't even realized anything was seriously wrong yet as it simply shut off and coasted with no concerning noises.
Leading up to this, there was a vibration that came and went about every 3-4 seconds, but this Rover has exhibited this before which had been remedied by a number of drivetrain repairs/upgrades.
The vibration suddenly felt slightly more intense and I felt a loss off power, pulled over, and here we are.
I'll check for compression today. Would the timing chain go quietly? When it died at-speed it was so quiet I hadn't even realized anything was seriously wrong yet as it simply shut off and coasted with no concerning noises.
Leading up to this, there was a vibration that came and went about every 3-4 seconds, but this Rover has exhibited this before which had been remedied by a number of drivetrain repairs/upgrades.
The vibration suddenly felt slightly more intense and I felt a loss off power, pulled over, and here we are.
#13
I'll be picking up a used interior fuse panel from a local who is scrapping their Disco out to Craigslist sometime either tonight or tomorrow and will report back.
I also have a used ECU and BCM in my storage unit a couple towns over if this doesn't work, just to rule things out that are simple.
I forgot until literally just now that I believe the coolant temp and trip MPG on the UltraGauge read "Err" when this all transpired. I don't know if that's of any significance.
I also have a used ECU and BCM in my storage unit a couple towns over if this doesn't work, just to rule things out that are simple.
I forgot until literally just now that I believe the coolant temp and trip MPG on the UltraGauge read "Err" when this all transpired. I don't know if that's of any significance.
The following users liked this post:
adolfojbonilla (11-12-2021)
#14
I'll be picking up a used interior fuse panel from a local who is scrapping their Disco out to Craigslist sometime either tonight or tomorrow and will report back.
I also have a used ECU and BCM in my storage unit a couple towns over if this doesn't work, just to rule things out that are simple.
I forgot until literally just now that I believe the coolant temp and trip MPG on the UltraGauge read "Err" when this all transpired. I don't know if that's of any significance.
I also have a used ECU and BCM in my storage unit a couple towns over if this doesn't work, just to rule things out that are simple.
I forgot until literally just now that I believe the coolant temp and trip MPG on the UltraGauge read "Err" when this all transpired. I don't know if that's of any significance.
#15
Replaced fuse panel with no luck. No change in symptoms.
I did get a random pending P1668 but it hasn't come back. I used to get that code every time I started the engine and I believe it was related to my house battery setup (disconnected currently during all this).
I also noticed my UltraGauge reads engine temp fine when key is in II position but when I crank it and stop the engine temp and MPG read "Err".
I did get a random pending P1668 but it hasn't come back. I used to get that code every time I started the engine and I believe it was related to my house battery setup (disconnected currently during all this).
I also noticed my UltraGauge reads engine temp fine when key is in II position but when I crank it and stop the engine temp and MPG read "Err".
#16
Replaced fuse panel with no luck. No change in symptoms.
I did get a random pending P1668 but it hasn't come back. I used to get that code every time I started the engine and I believe it was related to my house battery setup (disconnected currently during all this).
I also noticed my UltraGauge reads engine temp fine when key is in II position but when I crank it and stop the engine temp and MPG read "Err".
I did get a random pending P1668 but it hasn't come back. I used to get that code every time I started the engine and I believe it was related to my house battery setup (disconnected currently during all this).
I also noticed my UltraGauge reads engine temp fine when key is in II position but when I crank it and stop the engine temp and MPG read "Err".
I ask because I'm on the same task, but it has been HARD finding the one I need (YQE000250), and although I was told to replace it with the same one, or YQE000410 that superseded it, I pulled out a YQE103830 from a similar truck with no SAI and will take it to my mechanic tomorrow and see if at least the truck starts.
Nothing tried so far has worked,, so we'll give this a try.
My truck is a 2002 SII SE with SAI
Last edited by adolfojbonilla; 11-15-2021 at 03:16 PM.
#17
Will keep posting updates until this is solved.
Spark tested good with inline spark tester.
Fuel measured over 50psi while cranking.
Interior fuse box changed with no luck.
Inertia switch jumped with no luck.
New copper plugs and fuel pump relay unplugged, no change.
No visible water damage at ECU.
No abnormal alarm light on dash behavior AKA not likely immobilized(?).
Service Engine Soon light is on during startup indicating ECU is communicating properly(?).
Relays swapped and all fuses checked, no change.
Grounds checked.
Alternator connection checked.
Battery is new and gets charged overnight when I'm not working on it, so I have full charge every morning.
A few notes:
One of the melted and severely damaged wires sent power to I believe the fuel injectors. I have repaired this but could a short in that system cause an ECU fault?
I occasionally get what I believe sounds like a backfire in the exhaust when cranking. When I say occasional I mean like maybe once a day randomly when trying to crank.
I asked further up but never got an answer, there is no grinding or mechanically concerning noises when cranking, nor when the engine cut out. Since the timing chain was mentioned, would there have been a noticeable engine clatter associated? And is there an easy way to check this?
Any help is greatly appreciated. I've seen numerous posts with the same predicament but there are so many that don't follow up with the solution! The ones that do, I've already tried.
Spark tested good with inline spark tester.
Fuel measured over 50psi while cranking.
Interior fuse box changed with no luck.
Inertia switch jumped with no luck.
New copper plugs and fuel pump relay unplugged, no change.
No visible water damage at ECU.
No abnormal alarm light on dash behavior AKA not likely immobilized(?).
Service Engine Soon light is on during startup indicating ECU is communicating properly(?).
Relays swapped and all fuses checked, no change.
Grounds checked.
Alternator connection checked.
Battery is new and gets charged overnight when I'm not working on it, so I have full charge every morning.
A few notes:
One of the melted and severely damaged wires sent power to I believe the fuel injectors. I have repaired this but could a short in that system cause an ECU fault?
I occasionally get what I believe sounds like a backfire in the exhaust when cranking. When I say occasional I mean like maybe once a day randomly when trying to crank.
I asked further up but never got an answer, there is no grinding or mechanically concerning noises when cranking, nor when the engine cut out. Since the timing chain was mentioned, would there have been a noticeable engine clatter associated? And is there an easy way to check this?
Any help is greatly appreciated. I've seen numerous posts with the same predicament but there are so many that don't follow up with the solution! The ones that do, I've already tried.
#18
#19
Will keep posting updates until this is solved.
Spark tested good with inline spark tester.
Fuel measured over 50psi while cranking.
Interior fuse box changed with no luck.
Inertia switch jumped with no luck.
New copper plugs and fuel pump relay unplugged, no change.
No visible water damage at ECU.
No abnormal alarm light on dash behavior AKA not likely immobilized(?).
Service Engine Soon light is on during startup indicating ECU is communicating properly(?).
Relays swapped and all fuses checked, no change.
Grounds checked.
Alternator connection checked.
Battery is new and gets charged overnight when I'm not working on it, so I have full charge every morning.
A few notes:
One of the melted and severely damaged wires sent power to I believe the fuel injectors. I have repaired this but could a short in that system cause an ECU fault?
I occasionally get what I believe sounds like a backfire in the exhaust when cranking. When I say occasional I mean like maybe once a day randomly when trying to crank.
I asked further up but never got an answer, there is no grinding or mechanically concerning noises when cranking, nor when the engine cut out. Since the timing chain was mentioned, would there have been a noticeable engine clatter associated? And is there an easy way to check this?
Any help is greatly appreciated. I've seen numerous posts with the same predicament but there are so many that don't follow up with the solution! The ones that do, I've already tried.
Spark tested good with inline spark tester.
Fuel measured over 50psi while cranking.
Interior fuse box changed with no luck.
Inertia switch jumped with no luck.
New copper plugs and fuel pump relay unplugged, no change.
No visible water damage at ECU.
No abnormal alarm light on dash behavior AKA not likely immobilized(?).
Service Engine Soon light is on during startup indicating ECU is communicating properly(?).
Relays swapped and all fuses checked, no change.
Grounds checked.
Alternator connection checked.
Battery is new and gets charged overnight when I'm not working on it, so I have full charge every morning.
A few notes:
One of the melted and severely damaged wires sent power to I believe the fuel injectors. I have repaired this but could a short in that system cause an ECU fault?
I occasionally get what I believe sounds like a backfire in the exhaust when cranking. When I say occasional I mean like maybe once a day randomly when trying to crank.
I asked further up but never got an answer, there is no grinding or mechanically concerning noises when cranking, nor when the engine cut out. Since the timing chain was mentioned, would there have been a noticeable engine clatter associated? And is there an easy way to check this?
Any help is greatly appreciated. I've seen numerous posts with the same predicament but there are so many that don't follow up with the solution! The ones that do, I've already tried.
#20