Help with over-fuelling TDV8
Discussion
Krikkit said:
Well I owe you a pint (or several) for this one - this was exactly the issue, I think it's a design change as the OEM originals I took off in October have circlipped-on heads to valve stems, this one is screwed and snapped off around the middle of the thread.
Found it exactly as in the pic when I removed it from the cooler.
https://youtu.be/UL-Uw-VvpPE This was the smoke level while it was broken, hopefully someone else will find this thread and avoid expense and head scratching!
Boom, there it is!Found it exactly as in the pic when I removed it from the cooler.
https://youtu.be/UL-Uw-VvpPE This was the smoke level while it was broken, hopefully someone else will find this thread and avoid expense and head scratching!
Edited by Krikkit on Tuesday 25th July 21:44
It is easy to forget with modern ECU's that they will only throw a fault code for what they can 'see'. In the case of this failure, as far as the ECU is concerned, the valve moves, so it is fine.What is can't see is the valve has failed mechanically.
Megaflow said:
Boom, there it is!
It is easy to forget with modern ECU's that they will only throw a fault code for what they can 'see'. In the case of this failure, as far as the ECU is concerned, the valve moves, so it is fine.What is can't see is the valve has failed mechanically.
Indeed, it would've been much higher on my list for failure if it wasn't right in its supposed minimal chance of failure... The annoying thing is I'll need to re-do the other side as well, wouldn't surprise me if that falls to bits as well.It is easy to forget with modern ECU's that they will only throw a fault code for what they can 'see'. In the case of this failure, as far as the ECU is concerned, the valve moves, so it is fine.What is can't see is the valve has failed mechanically.
Piersman2 said:
Have you considered that the EGRs may not be working properly?
On my old 3.6TDV8 it was running s
te and I put it into my local specialist. They checked it all out, no error codes so suspected turbos were on way out. Swapped both, made no difference although old ones were starting to go.
Much head scratching, no obvious reason what the problem could be. Eventually they started a strip down to try and find something wrong and had their eureka moment when they took of the EGR valves... one of them was missing the end of the valve stem. The car thought the valve was operating as expected, the garage had been able to hear it operating as normal, but it just wasn't sealing (or opening) as it should have done, effecively it was just wide open all the time.
My paperwork for the car showed that the EGRs had been replaced by the previous owner several tens of thousands of miles previously, but he hadn't used JLR EGRs, he'd got some cheapies from China, and the valve head had just snapped off.
Made the car run like a bh, chugging and smoking all over the place.
You're simply the bestOn my old 3.6TDV8 it was running s
te and I put it into my local specialist. They checked it all out, no error codes so suspected turbos were on way out. Swapped both, made no difference although old ones were starting to go.Much head scratching, no obvious reason what the problem could be. Eventually they started a strip down to try and find something wrong and had their eureka moment when they took of the EGR valves... one of them was missing the end of the valve stem. The car thought the valve was operating as expected, the garage had been able to hear it operating as normal, but it just wasn't sealing (or opening) as it should have done, effecively it was just wide open all the time.
My paperwork for the car showed that the EGRs had been replaced by the previous owner several tens of thousands of miles previously, but he hadn't used JLR EGRs, he'd got some cheapies from China, and the valve head had just snapped off.
Made the car run like a b
h, chugging and smoking all over the place.Classic diagnosis
Polly Grigora said:
Piersman2 said:
Have you considered that the EGRs may not be working properly?
On my old 3.6TDV8 it was running ste and I put it into my local specialist. They checked it all out, no error codes so suspected turbos were on way out. Swapped both, made no difference although old ones were starting to go.
Much head scratching, no obvious reason what the problem could be. Eventually they started a strip down to try and find something wrong and had their eureka moment when they took of the EGR valves... one of them was missing the end of the valve stem. The car thought the valve was operating as expected, the garage had been able to hear it operating as normal, but it just wasn't sealing (or opening) as it should have done, effecively it was just wide open all the time.
My paperwork for the car showed that the EGRs had been replaced by the previous owner several tens of thousands of miles previously, but he hadn't used JLR EGRs, he'd got some cheapies from China, and the valve head had just snapped off.
Made the car run like a bh, chugging and smoking all over the place.
You're simply the bestOn my old 3.6TDV8 it was running s
te and I put it into my local specialist. They checked it all out, no error codes so suspected turbos were on way out. Swapped both, made no difference although old ones were starting to go.Much head scratching, no obvious reason what the problem could be. Eventually they started a strip down to try and find something wrong and had their eureka moment when they took of the EGR valves... one of them was missing the end of the valve stem. The car thought the valve was operating as expected, the garage had been able to hear it operating as normal, but it just wasn't sealing (or opening) as it should have done, effecively it was just wide open all the time.
My paperwork for the car showed that the EGRs had been replaced by the previous owner several tens of thousands of miles previously, but he hadn't used JLR EGRs, he'd got some cheapies from China, and the valve head had just snapped off.
Made the car run like a b
h, chugging and smoking all over the place.Classic diagnosis
Genuinely pleased the OP found it and has got it sussed, nice to be able to pay back a little to the karma scales sometimes!
Piersman2 said:
Polly Grigora said:
Piersman2 said:
Have you considered that the EGRs may not be working properly?
On my old 3.6TDV8 it was running ste and I put it into my local specialist. They checked it all out, no error codes so suspected turbos were on way out. Swapped both, made no difference although old ones were starting to go.
Much head scratching, no obvious reason what the problem could be. Eventually they started a strip down to try and find something wrong and had their eureka moment when they took of the EGR valves... one of them was missing the end of the valve stem. The car thought the valve was operating as expected, the garage had been able to hear it operating as normal, but it just wasn't sealing (or opening) as it should have done, effecively it was just wide open all the time.
My paperwork for the car showed that the EGRs had been replaced by the previous owner several tens of thousands of miles previously, but he hadn't used JLR EGRs, he'd got some cheapies from China, and the valve head had just snapped off.
Made the car run like a bh, chugging and smoking all over the place.
You're simply the bestOn my old 3.6TDV8 it was running s
te and I put it into my local specialist. They checked it all out, no error codes so suspected turbos were on way out. Swapped both, made no difference although old ones were starting to go.Much head scratching, no obvious reason what the problem could be. Eventually they started a strip down to try and find something wrong and had their eureka moment when they took of the EGR valves... one of them was missing the end of the valve stem. The car thought the valve was operating as expected, the garage had been able to hear it operating as normal, but it just wasn't sealing (or opening) as it should have done, effecively it was just wide open all the time.
My paperwork for the car showed that the EGRs had been replaced by the previous owner several tens of thousands of miles previously, but he hadn't used JLR EGRs, he'd got some cheapies from China, and the valve head had just snapped off.
Made the car run like a b
h, chugging and smoking all over the place.Classic diagnosis
Genuinely pleased the OP found it and has got it sussed, nice to be able to pay back a little to the karma scales sometimes!
If you hadn't visited this topic........
You possibly prevented a vehicle going up in smoke
Piersman2 said:
Only because I'd trail blazed a very similar experience to the OP with my garage as they scratched their heads over it for 3 weeks, and he'd clearly already done most of what my garage had done to try and solve it.
Genuinely pleased the OP found it and has got it sussed, nice to be able to pay back a little to the karma scales sometimes!
Genuinely pleased the OP found it and has got it sussed, nice to be able to pay back a little to the karma scales sometimes!
I'll try and pay it forward.Hey guys, my Range Rover is exhibiting the exact same symptoms. Also runs and smokes exactly like in the video posted.
I’m happy to do the work to the egr, maybe not myself but my question is, would blanking off the egr fix the issue? Or does the egr have to come out to remove this broken part?
If in fact mine turns out to be the same problem.
I’ve had new turbo, new injector, new rocker cover and this seems to be the last potential reason for how it’s running.
Blanking the egr is obviously significantly cheaper than replacing the whole valve
Thank you
I’m happy to do the work to the egr, maybe not myself but my question is, would blanking off the egr fix the issue? Or does the egr have to come out to remove this broken part?
If in fact mine turns out to be the same problem.
I’ve had new turbo, new injector, new rocker cover and this seems to be the last potential reason for how it’s running.
Blanking the egr is obviously significantly cheaper than replacing the whole valve
Thank you
G11fwc said:
Blanking the egr is obviously significantly cheaper than replacing the whole valve
And it is illegal.Why not just get the fault diagnosed properly & then fixed?
It seems somebody is just getting you to pay to do random jobs on your engine & making a tidy profit out of you.
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