sabredylan
New Member
Hi everyone
I'm new to both Land Rovers and the site, so please excuse my lack of knowledge.
Recently acquired a td5 Disco 2 auto. I've had a vibration when the auto box changes gear, which is usually around 2500 revs. I thought it was a transmission fault at first, but after searching and reading threads, I became aware of the oil in the loom problem. I checked mine and low and behold, there was quite a bit of oil in the red plug. I cleaned this out along with the plug itself. What a difference, I couldn't believe how smooth the gear change was and the vibration had gone..........or so I thought!!!!!!
The engine was like silk for about an hour, but then the vibration came back. I checked the ecu again and there was a bit of residual oil, but nothing like the amount I found initially. So to cut a long story, the vibration came back and I can't get rid of it. You can feel the vibration in neutral when you hold the revs between 2000 and 2500. You can drive through the vibration and it seems to smooth out, but easy driving and light throttle, its very apparent. It is still misfiring.
During a journey earlier in the week, the disco was misfiring/vibrating on gear change. I had to nip to the shops, but on returning to the Disco after a short time, it ran like silk again for about 3 miles.
My hands are full at the minute, with a new baby, so I'm unable to do any involved jobs. With this in mind, I purchased a new injector loom and rocker gasket from paddock, and took the disco to a local independent specialist. I told the mechanic to fit the injector harness and even got him to seal around around the plug connector with rtv.
I went to collect the disco yesterday and took it for a test drive. The vibration is still there. I held the revs at 2500 again and could feel the misfire. I returned the disco to the mechanic, who plugged in some fancy comm device. He checked injector or cylinder deviation and found at idle all was fine. On revving and holding at 2500 revs, cylinder 3 and showed negative deviation, cylinder 5 being the worst at up to -9. The mechanic says he will have to get all the injectors tested.......More expense.
This is what I've done so far: -
-Cleaned ECU plug and loom - made a huge difference for about an hour, but misfire
returned.
-Cleaned map sensor - no effect
-Cleaned Maf sensor - no effect.
-Checked and oiled wastegate actuater arm - no effect.
-Changed and sealed injector harness - no effect.
-Had new in tank fuel pump.
-Had full service, with all filters changed, engine flushed and auto box oil changed.
There is no engine check light and the only fault code that came up was something like too slow for cruise control, even though I don't use it.
I can't help but think that the problem is something starring me in the face. After initial ecu cleaning the disco ran like a dream and has ran well since albeit for only a few miles. For this reason I'm loathed to get into a few hundred pounds having the injectors messed with, just to find its not the problem. To me if an injector is bad, it would be bad all the time.
Can any of the site gurus give me any ideas on something I've missed or where to look before having the injectors checked?????
Sorry for the long post, but just want to give as much info as possible
Many thanks in advance
I'm new to both Land Rovers and the site, so please excuse my lack of knowledge.
Recently acquired a td5 Disco 2 auto. I've had a vibration when the auto box changes gear, which is usually around 2500 revs. I thought it was a transmission fault at first, but after searching and reading threads, I became aware of the oil in the loom problem. I checked mine and low and behold, there was quite a bit of oil in the red plug. I cleaned this out along with the plug itself. What a difference, I couldn't believe how smooth the gear change was and the vibration had gone..........or so I thought!!!!!!
The engine was like silk for about an hour, but then the vibration came back. I checked the ecu again and there was a bit of residual oil, but nothing like the amount I found initially. So to cut a long story, the vibration came back and I can't get rid of it. You can feel the vibration in neutral when you hold the revs between 2000 and 2500. You can drive through the vibration and it seems to smooth out, but easy driving and light throttle, its very apparent. It is still misfiring.
During a journey earlier in the week, the disco was misfiring/vibrating on gear change. I had to nip to the shops, but on returning to the Disco after a short time, it ran like silk again for about 3 miles.
My hands are full at the minute, with a new baby, so I'm unable to do any involved jobs. With this in mind, I purchased a new injector loom and rocker gasket from paddock, and took the disco to a local independent specialist. I told the mechanic to fit the injector harness and even got him to seal around around the plug connector with rtv.
I went to collect the disco yesterday and took it for a test drive. The vibration is still there. I held the revs at 2500 again and could feel the misfire. I returned the disco to the mechanic, who plugged in some fancy comm device. He checked injector or cylinder deviation and found at idle all was fine. On revving and holding at 2500 revs, cylinder 3 and showed negative deviation, cylinder 5 being the worst at up to -9. The mechanic says he will have to get all the injectors tested.......More expense.
This is what I've done so far: -
-Cleaned ECU plug and loom - made a huge difference for about an hour, but misfire
returned.
-Cleaned map sensor - no effect
-Cleaned Maf sensor - no effect.
-Checked and oiled wastegate actuater arm - no effect.
-Changed and sealed injector harness - no effect.
-Had new in tank fuel pump.
-Had full service, with all filters changed, engine flushed and auto box oil changed.
There is no engine check light and the only fault code that came up was something like too slow for cruise control, even though I don't use it.
I can't help but think that the problem is something starring me in the face. After initial ecu cleaning the disco ran like a dream and has ran well since albeit for only a few miles. For this reason I'm loathed to get into a few hundred pounds having the injectors messed with, just to find its not the problem. To me if an injector is bad, it would be bad all the time.
Can any of the site gurus give me any ideas on something I've missed or where to look before having the injectors checked?????
Sorry for the long post, but just want to give as much info as possible
Many thanks in advance