Carwash - Killing Machine
#1
Carwash - Killing Machine
Yes, I know, I know, I should know better but... after years of nothing ever happened like that,
it's about time for me to learn that sooner or later car-wash will claim it new victim.
Anyway, after I wash it and tried to start, she would fire up but 1 - 2 seconds latter would die.
Error massages would include know line up such as: engine system, parking brake, etc.
After clearing error, I've managed to start but it would run if I keep above 4000 RPM and as soon
as I let pedal go, it would die. I tried to clean throttle and air flow sensor without any luck.
What would be the easiest way to fix this problem?
Thanks
it's about time for me to learn that sooner or later car-wash will claim it new victim.
Anyway, after I wash it and tried to start, she would fire up but 1 - 2 seconds latter would die.
Error massages would include know line up such as: engine system, parking brake, etc.
After clearing error, I've managed to start but it would run if I keep above 4000 RPM and as soon
as I let pedal go, it would die. I tried to clean throttle and air flow sensor without any luck.
What would be the easiest way to fix this problem?
Thanks
Last edited by jagxjr; 11-11-2018 at 12:22 AM.
#2
Perhaps water in the crank sensor or crank sensor plug? I just got done reading another thread where they stated the fuel pump will not stay on if the car can't see the engine turning over as a safety feature. IveI had all sorts of headaches after washing engines, but that sparkly clean engine bay is hard to resist! It's worth disconnecting it and using some compressed/canned air or, if your not like me and have more patience, let it air dry for a bit.
#4
#5
problem twice (but his Jag just blown a few fuses) and according to car-wash staff something like that has had
happen to other Jags and others misc vehicles.
So, thanks for trying but... do you have something helpful I can apply to fix my car?
Last edited by jagxjr; 11-11-2018 at 02:02 PM.
#6
#7
What I need to know, is what can I do now based on how my Jag is acting.
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#9
Sounds like water seepage from windshield area may have found it's way into PCM or harness. Sometimes water will seep behind the windshield cowl and drip on the firewall, where the PCM sits.
For starters check your drain in front of the cabin filter to ensure it is not blocked and drains freely.
For starters check your drain in front of the cabin filter to ensure it is not blocked and drains freely.
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89 Jacobra (11-11-2018)
#10
I think I got you - Had this happen on my 06 XJ8L - Its VERY likely the PCM is as stated above. The drain right under the cabin air filter gets blocked with leaves and debris. Then ONE good car wash and water not only gets into the PCM harness, IT GETS DIRECTLY INTO THE PCM CASE.
Its aluminum - the case, and you will need to get the passenger footwell carpeting pulled back and remove it from the harness. The harness is locked on with a cam, so don't try forcing it off the harness. Its hard to see down in the footwell, but that cam is just a U-shaped arm that pulls and holds the harness on the ECU connection. When I did and tilted it WATER came pouring out. After 3 weeks of ownership, I was seriously hyperventilating. Wondering what this was going to cost me. In the end it cost me a few hours of panic, and some disassembly - nothing more.
The good news? The Circuit Board in there is plastic coated and had NO permanent damage. I dried it with a blow dryer (gently) after removing the ONE PCB in the module. Put it back together and everything was PERFECT - except I had to reset the Parking Brake and the Windows - Oh yeah - DO disconnect your negative battery lead before pulling any of this apart. I am fairly sure you have this going on - you have exactly the same symptoms I had and directly after a car wash - Lots of alerts, warnings, and ran so poorly I could not drive it home.
I ended up disassembling it and drying the board in a small pharmacy with a blow dryer they let me use - I had pulled into their parking lot the night before. Don't keep trying to run the car, and don't expect to dry it out without pulling the ECM or whatever Jaguar calls the Engine Control Module out of the car. I did that for about 2 hours, thinking whatever got wet would dry. When the water poured out of the module (about the size of a car radio head unit) I know I was looking at the trouble - I was VERY impressed that a thorough dry out was all it needed to be perfect once again. I think I wrote this up at the time. I will take a look.
Its aluminum - the case, and you will need to get the passenger footwell carpeting pulled back and remove it from the harness. The harness is locked on with a cam, so don't try forcing it off the harness. Its hard to see down in the footwell, but that cam is just a U-shaped arm that pulls and holds the harness on the ECU connection. When I did and tilted it WATER came pouring out. After 3 weeks of ownership, I was seriously hyperventilating. Wondering what this was going to cost me. In the end it cost me a few hours of panic, and some disassembly - nothing more.
The good news? The Circuit Board in there is plastic coated and had NO permanent damage. I dried it with a blow dryer (gently) after removing the ONE PCB in the module. Put it back together and everything was PERFECT - except I had to reset the Parking Brake and the Windows - Oh yeah - DO disconnect your negative battery lead before pulling any of this apart. I am fairly sure you have this going on - you have exactly the same symptoms I had and directly after a car wash - Lots of alerts, warnings, and ran so poorly I could not drive it home.
I ended up disassembling it and drying the board in a small pharmacy with a blow dryer they let me use - I had pulled into their parking lot the night before. Don't keep trying to run the car, and don't expect to dry it out without pulling the ECM or whatever Jaguar calls the Engine Control Module out of the car. I did that for about 2 hours, thinking whatever got wet would dry. When the water poured out of the module (about the size of a car radio head unit) I know I was looking at the trouble - I was VERY impressed that a thorough dry out was all it needed to be perfect once again. I think I wrote this up at the time. I will take a look.
#11
If you find your PCM did get wet you need to take necessary steps to ensure water ingress doesnt occur again.
I sealed my cowl to the bottom of my windshield and placed clear silicone in areas around my PCM rubber on the firewall. Now the heaviest rains go away from the firewall and down the sides of the cabin filter to the drain underneath.
I would firmly take my XJR through the car wash. (Although I never use them) Hand wash all the way.
I sealed my cowl to the bottom of my windshield and placed clear silicone in areas around my PCM rubber on the firewall. Now the heaviest rains go away from the firewall and down the sides of the cabin filter to the drain underneath.
I would firmly take my XJR through the car wash. (Although I never use them) Hand wash all the way.
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jagxjr (11-14-2018)
#12
Fault with communication with vehicle ECU.
Please confirm:
1. This vehicle is armed with the system;
2. This system is an electrical control system.
3. The diagnostic connector is OK;
Please confirm:
1. This vehicle is armed with the system;
2. This system is an electrical control system.
3. The diagnostic connector is OK;
- Restricted Performance
- Parking brakes
- Air Compressor
#14
#15
Something is definitely off for sure.
#17
#18
Dude, you are still not right? The fact that your OBD2 reader cant communicate with the ECU further indicates a similar ECU flooding, very likely similar to mine.
I had the EXACT same dashboard warnings (minus the compressor code) and a message from my code reader that it could not communicate with the vehicle Engine Control Module.
It COULD be the harness connection. I thought that was possibly my issue, but once I got the unit out and tipped it, the water running out kind of made the issue obvious
I was only down one day though. Surprised you haven't pulled it to check at minimum. Note that from what I experienced, I wouldn't count on it drying by itself. The amount of water in a semi-sealed unit, would likely take months, and leaving it wet would definitely increase the chances of damage to the PCB. While it's a coated cicuit board, it wont survive a long soaking. I disconnected my battery when this happened to me, and while I haven't sealed the cowl further as the other forum member did, I check that drain by the cabinet air filter like a hawk.
This is not something I want to repeat.
For your suspension compressor, did you get the PTFE piston ring kit? It's an easy install. The worst part is getting the compressor back in place, with all the washers, springs, nuts and isolating parts that hold it in place.
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jagxjr (11-19-2018)
#19
I order some parts like kit for air compressor and relay, air flow sensor, oxygen sensors etc.
My half priced Jag's back-lane mechanic won't start work at least I have all parts, so we're waiting.
Thanks for your active participation and help
#20
I order some parts like kit for air compressor and relay, air flow sensor, oxygen sensors etc.
My half priced Jag's back-lane mechanic won't start work at least I have all parts, so we're waiting.
Thanks for your active participation and help