Dexterdog
Member
- Posts
- 10
- Location
- Gloucestershire
Looking for some help please having followed the forum for a while.
@Sierraferry (or anyone else !)- if you are out there I have read your posts on issues relating to wastegates and mapping and would appreciate any help as you seem to have been around this issue before.
TD5 2001 defender 10p engine. It hesitates / misfires (intermittently) only ever under light acceleration, Cruise at 50mph it will sometimes hesitate, 2nd gear low range it will kangaroo sometimes. Drive it hard and there is no problem. I have now found the problem is related to off boost (I think), once the turbo comes in there is no problem.
When it started it was only noticeable when engine temp cold and was different but I now assume it was the same issue which was exaggerated by the remap and then started happening when engine was warm too .
If I back off the wastgate actuator all the way, the problem becomes easy to reproduce and is more obvious and is present in more of the first part of the accelerator pedal travel (once the turbo gets going the problem disappaears), wind it back to normal position (13 threads) its less obvious and only for less of the pedal travel, wind it on another thread, it goes away more and for less of the pedal travel, another thread (11 showing) same result and less obvious.
I think that once the turbo is coming into play earlier (which I am doing by adjusting the actuator) the problem disappears. I cant get rid of it completely by adjusting the actuator but I can influence it and make it more or less obvious and more persistent.
What I need help with is interpreting what that could mean
Remap guys suggest MAP sensor or FPR but FPR now done.
The engine loom is oily. I dont have oil coming from injector harness anymore. However, there are some random fault codes that cannot be cleared and garage has suggested engine loom could be at fault
So, I dont know if the actuator adjustment means its a mechanical issue or if the actuator adjustment is masking something else or if its buggered loom sending wrong signals or if it could be MAP sensor (or something else). I am also doubting (but only gut instinct) that if the fault codes wont clear because of oily loom then I assume live data messages could be mixed up too
Any words of wisdom would be gratefully received
Done items - EGR delete, MAF, FPR, Injector seals, injector harness, loom now dry and no oil at red plug, fuel filter, fuel pump sounds fine no fuel leaks anywhere in system that can be seen, fuel temp sensor changed, turbo no play, intercooler pipes all ok, been remapped and map checked, wastegate actuator moving freely, tps on pedal ok)
@Sierraferry (or anyone else !)- if you are out there I have read your posts on issues relating to wastegates and mapping and would appreciate any help as you seem to have been around this issue before.
TD5 2001 defender 10p engine. It hesitates / misfires (intermittently) only ever under light acceleration, Cruise at 50mph it will sometimes hesitate, 2nd gear low range it will kangaroo sometimes. Drive it hard and there is no problem. I have now found the problem is related to off boost (I think), once the turbo comes in there is no problem.
When it started it was only noticeable when engine temp cold and was different but I now assume it was the same issue which was exaggerated by the remap and then started happening when engine was warm too .
If I back off the wastgate actuator all the way, the problem becomes easy to reproduce and is more obvious and is present in more of the first part of the accelerator pedal travel (once the turbo gets going the problem disappaears), wind it back to normal position (13 threads) its less obvious and only for less of the pedal travel, wind it on another thread, it goes away more and for less of the pedal travel, another thread (11 showing) same result and less obvious.
I think that once the turbo is coming into play earlier (which I am doing by adjusting the actuator) the problem disappears. I cant get rid of it completely by adjusting the actuator but I can influence it and make it more or less obvious and more persistent.
What I need help with is interpreting what that could mean
Remap guys suggest MAP sensor or FPR but FPR now done.
The engine loom is oily. I dont have oil coming from injector harness anymore. However, there are some random fault codes that cannot be cleared and garage has suggested engine loom could be at fault
So, I dont know if the actuator adjustment means its a mechanical issue or if the actuator adjustment is masking something else or if its buggered loom sending wrong signals or if it could be MAP sensor (or something else). I am also doubting (but only gut instinct) that if the fault codes wont clear because of oily loom then I assume live data messages could be mixed up too
Any words of wisdom would be gratefully received
Done items - EGR delete, MAF, FPR, Injector seals, injector harness, loom now dry and no oil at red plug, fuel filter, fuel pump sounds fine no fuel leaks anywhere in system that can be seen, fuel temp sensor changed, turbo no play, intercooler pipes all ok, been remapped and map checked, wastegate actuator moving freely, tps on pedal ok)
