I replaced my 1999 XKR for a 351 5.0 and a 2005 XK convertible THEN TROUBLES!
#1
I replaced my 1999 XKR for a 351 5.0 and a 2005 XK convertible THEN TROUBLES!
I own a Volvo workshop and I am used to diagnostic tools. For fast an easy service we ha a snap-on machine.
when I connect my XJ 2010 5.0 V8 78.000 km I can see and feel many many misfires spead over all cilinders, specificaly at certain rpm such as 1000 rpm 1600 rpm and 2000 rpm. My dealer has no clue. It has codes like manifold pressure, fuel pressure maf etc. They all are fine.Jaguar did the update but I feel that is to prevent the engine light will EVER come on.
This sarurday I checked out the same comparable car somewhere else. It was even worse than mine, shaking as hell. Again no light. Has there ever been a solution to this problem? I have guarantee, but again, they dont have a clue.
I have been using injector cleaner every tank, replaced sparplugs, the dealer dis a mechanical cleaning of the engine. Valves etc.
please advise?
A big fraud?
when I connect my XJ 2010 5.0 V8 78.000 km I can see and feel many many misfires spead over all cilinders, specificaly at certain rpm such as 1000 rpm 1600 rpm and 2000 rpm. My dealer has no clue. It has codes like manifold pressure, fuel pressure maf etc. They all are fine.Jaguar did the update but I feel that is to prevent the engine light will EVER come on.
This sarurday I checked out the same comparable car somewhere else. It was even worse than mine, shaking as hell. Again no light. Has there ever been a solution to this problem? I have guarantee, but again, they dont have a clue.
I have been using injector cleaner every tank, replaced sparplugs, the dealer dis a mechanical cleaning of the engine. Valves etc.
please advise?
A big fraud?
#2
#3
Are you sure it's misfiring?
Hard to believe that would not set a code or at least give a pending code.
I was thinking carbon problems from the DI but you mention the dealer cleaned the intake valves so that should have fixed that.
Maybe plugged catalytic converter?
Without any codes I am lost on what to suggest?
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Hard to believe that would not set a code or at least give a pending code.
I was thinking carbon problems from the DI but you mention the dealer cleaned the intake valves so that should have fixed that.
Maybe plugged catalytic converter?
Without any codes I am lost on what to suggest?
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#5
#6
I did use euro 98 and berner premium fuel additive, now euro 95. No differance with ore without berner cleaner.
#7
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DutchJag, I am taking a stab in the dark at this, but could you have a problem with the crankshaft speed sensor not sensing. That would cause the car to fire the cylinders at the wrong times, leading to the misfires. that could also potentially explain the randomness of it too.
The only other thing that I can think of is the variable valve timing is sticking and that is causing things to act goofey. Along those lines, what oil are you using in the car? At a minimum it needs to be full synthetic. If you get into the Jaguar Spec for oil, there is only like 2 oils that are supposed to be used in the car. Granted, others have used other quality full synthetics with no issues to date.
The only other thing that I can think of is the variable valve timing is sticking and that is causing things to act goofey. Along those lines, what oil are you using in the car? At a minimum it needs to be full synthetic. If you get into the Jaguar Spec for oil, there is only like 2 oils that are supposed to be used in the car. Granted, others have used other quality full synthetics with no issues to date.
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#8
I don't see how under normal circumstances constant misfires would not trigger a code and check engine light. Do you also have knock sensor malfunction codes? Have you checked if somehow your knock sensors were bypassed?
My theory that this is something else, and not misfires. Check engine and transmission mounts? Check driveshaft center bearing?
My theory that this is something else, and not misfires. Check engine and transmission mounts? Check driveshaft center bearing?
#9
I don't see how under normal circumstances constant misfires would not trigger a code and check engine light. Do you also have knock sensor malfunction codes? Have you checked if somehow your knock sensors were bypassed?
My theory that this is something else, and not misfires. Check engine and transmission mounts? Check driveshaft center bearing?
My theory that this is something else, and not misfires. Check engine and transmission mounts? Check driveshaft center bearing?
DutchJag, I am taking a stab in the dark at this, but could you have a problem with the crankshaft speed sensor not sensing. That would cause the car to fire the cylinders at the wrong times, leading to the misfires. that could also potentially explain the randomness of it too.
The only other thing that I can think of is the variable valve timing is sticking and that is causing things to act goofey. Along those lines, what oil are you using in the car? At a minimum it needs to be full synthetic. If you get into the Jaguar Spec for oil, there is only like 2 oils that are supposed to be used in the car. Granted, others have used other quality full synthetics with no issues to date.
The only other thing that I can think of is the variable valve timing is sticking and that is causing things to act goofey. Along those lines, what oil are you using in the car? At a minimum it needs to be full synthetic. If you get into the Jaguar Spec for oil, there is only like 2 oils that are supposed to be used in the car. Granted, others have used other quality full synthetics with no issues to date.
#11
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DutchJag, it is possible that if the misfires are occurring every now and then (use this loosely), then it is possible that it won't throw the code as it will not see a specific cylinder misfiring. Granted, I would still expect it to throw a P0300 code which would be for random misfires.
Out of curiousity, do you see it more with say the odd cylinders than the even numbered cylinders. if so, it could be the ground wire for that side cylinders being loose, causing a high resistance connection that would make and break, leading to a poor spark. If you see it on all cylinders, then you may want to take a look at the noise suppression capacitor, especially if you are starting to hear more noise coming through the radio.
From what you are describing, it is sounding like you have a wire that is loose or rubbing up against something. Something like the crankshaft speed sensor would be a good one for causing what you are seeing. Kinda like the wire for the VVT grounding would cause things to act goofey. But, you should be able to watch either one of these signals with the Snap-On machine and see them acting goofey at the same time you are seeing misfires. This is sounding like one of those things that is going to take a lot of time just looking in the engine bay for something that doesn't look quite right.
Out of curiousity, do you see it more with say the odd cylinders than the even numbered cylinders. if so, it could be the ground wire for that side cylinders being loose, causing a high resistance connection that would make and break, leading to a poor spark. If you see it on all cylinders, then you may want to take a look at the noise suppression capacitor, especially if you are starting to hear more noise coming through the radio.
From what you are describing, it is sounding like you have a wire that is loose or rubbing up against something. Something like the crankshaft speed sensor would be a good one for causing what you are seeing. Kinda like the wire for the VVT grounding would cause things to act goofey. But, you should be able to watch either one of these signals with the Snap-On machine and see them acting goofey at the same time you are seeing misfires. This is sounding like one of those things that is going to take a lot of time just looking in the engine bay for something that doesn't look quite right.
#12
DutchJag, it is possible that if the misfires are occurring every now and then (use this loosely), then it is possible that it won't throw the code as it will not see a specific cylinder misfiring. Granted, I would still expect it to throw a P0300 code which would be for random misfires.
Out of curiousity, do you see it more with say the odd cylinders than the even numbered cylinders. if so, it could be the ground wire for that side cylinders being loose, causing a high resistance connection that would make and break, leading to a poor spark. If you see it on all cylinders, then you may want to take a look at the noise suppression capacitor, especially if you are starting to hear more noise coming through the radio.
From what you are describing, it is sounding like you have a wire that is loose or rubbing up against something. Something like the crankshaft speed sensor would be a good one for causing what you are seeing. Kinda like the wire for the VVT grounding would cause things to act goofey. But, you should be able to watch either one of these signals with the Snap-On machine and see them acting goofey at the same time you are seeing misfires. This is sounding like one of those things that is going to take a lot of time just looking in the engine bay for something that doesn't look quite right.
Out of curiousity, do you see it more with say the odd cylinders than the even numbered cylinders. if so, it could be the ground wire for that side cylinders being loose, causing a high resistance connection that would make and break, leading to a poor spark. If you see it on all cylinders, then you may want to take a look at the noise suppression capacitor, especially if you are starting to hear more noise coming through the radio.
From what you are describing, it is sounding like you have a wire that is loose or rubbing up against something. Something like the crankshaft speed sensor would be a good one for causing what you are seeing. Kinda like the wire for the VVT grounding would cause things to act goofey. But, you should be able to watch either one of these signals with the Snap-On machine and see them acting goofey at the same time you are seeing misfires. This is sounding like one of those things that is going to take a lot of time just looking in the engine bay for something that doesn't look quite right.
thank you for your reply. One moment it stacks up misfires on number two, the other moment it is cilinder 7, onother 1.... it spreads . What you see on the image is what happens random. Very strange is that at exacly 2000 rpm and som other a bit less, 1000 and 1600 there always is a rumble through the cabin that stays.
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Andreas Schmieg
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