Hippo
Lord Hippo
You have the dark grey bumper. Called black but it's dark grey. It was standard fit at the time it was built.
Original bumpers were light grey. This changed to dark grey for the 2002 model year in the UK because they had just launched the Freelander 1 in the US where the darker grey would be a better selling point. Also makes the front end look smarter.
When they revised the front end in 2004 model year they changed to painted bumpers. I have to admit I always preferred the non painted option meself.
The V6 option sticks out an extra 50mm to cater for the radiator. Yours is the non V6 option.
They both look in good condition from the outside.
oxygen
Active Member
Hello guys, still investigating unburned fuel grey smoke of TD4.
I found interesting thing: Turbo vacuum actuator "hand" after engine start is about on half way to low position limiter. I found BMW videos on youtube with m47 engine. There after start actuator hand goes to lower limiter after car starts.
(i checked and replaced all vacuum hoses, replaced boost solenoid with new, there are no vacuum leak at all, actuator, vacuum accumulator holds vacuum as well)
My question would be: could somebody check (better- make video) how works they turbo actuator arm after engine starts.
If actuator works like my- then i will remove and professionally clean all injectors.
Video how my actuator works:
I found interesting thing: Turbo vacuum actuator "hand" after engine start is about on half way to low position limiter. I found BMW videos on youtube with m47 engine. There after start actuator hand goes to lower limiter after car starts.
(i checked and replaced all vacuum hoses, replaced boost solenoid with new, there are no vacuum leak at all, actuator, vacuum accumulator holds vacuum as well)
My question would be: could somebody check (better- make video) how works they turbo actuator arm after engine starts.
If actuator works like my- then i will remove and professionally clean all injectors.
Video how my actuator works:
GrumpyGel
Well-Known Member
Your video there shows unburned fuel - and from your posts you think this is due to a fault in the turbo. I am not an expert on this, but your video shows the smoke at idle and doesn't appear to increase that much as the revs rise. At idle the ECU would be injecting very low levels of fuel, this would burn at atmospheric pressure with no turbo assistance needed to burn it all. I'm wondering therefore how the turbo might affect this.
I get grey smoke like that from my L Series, although not as much. When I accelerate hard I get lots of black smoke at high revs. My thinking is the black smoke I get is unburnt fuel - but I don't know what the grey smoke is.
I get grey smoke like that from my L Series, although not as much. When I accelerate hard I get lots of black smoke at high revs. My thinking is the black smoke I get is unburnt fuel - but I don't know what the grey smoke is.
oxygen
Active Member
at idle i see some smoke as well, when engine is cold- stronger.
about turbo- intercooler hoses are clean inside, without oil. No turbo axle play as well (checked by removing air intake plastic hose).
Grey smoke with strong smell of diesel fuel. If car is in garage- there is no chance to be there, just smell too strong.
about turbo- intercooler hoses are clean inside, without oil. No turbo axle play as well (checked by removing air intake plastic hose).
Grey smoke with strong smell of diesel fuel. If car is in garage- there is no chance to be there, just smell too strong.
blodge
Member
If the engine is getting more fuel than it can burn then the most likely problem is that there is less air going into the cylinders than the engine management system thinks there is. The most common cause is a leak in the high pressure air system - intercooler hoses or inlet manifold (but you have checked that). The sound in your turbo video is not great but I think that I can hear the turbo spinning up as you rev the engine and I thought that I also heard an air leak whistle (your phone is reducing the volume as the engine gets louder so I am not sure about that). I agree with Grumpy that a poorly performing turbo would probably not cause smoke at idle speeds.
If it is not a high pressure leak or a vacuum servo leak then my next guess would be the MAP sensor or its wiring, have you looked inside the manifold or taken the MAP sensor out? It gets pretty dirty in the manifold and I have had a sensor completely blocked with tar, a sensor that is giving too high a pressure reading would cause overfuelling and smoke.
Another possible problem is the MAF sensor but I think that if it fails then you usually get an engine light and if it is beginning to fail then the signal is usually reduced which would cause the engine to run lean so no smoke.
If the air side of the equation is OK then the other reason for smoke would be that too much fuel is being injected. Have you checked the connector to the high pressure fuel rail. These can get corroded and a poor signal from the pressure sensor might cause the engine management to think that it has to hold the injectors open for longer than necessary and this would also cause smoke.
Final question - do you have a diagnostic tool of any kind? Some air pressure or fuel pressure data would help a lot.
If it is not a high pressure leak or a vacuum servo leak then my next guess would be the MAP sensor or its wiring, have you looked inside the manifold or taken the MAP sensor out? It gets pretty dirty in the manifold and I have had a sensor completely blocked with tar, a sensor that is giving too high a pressure reading would cause overfuelling and smoke.
Another possible problem is the MAF sensor but I think that if it fails then you usually get an engine light and if it is beginning to fail then the signal is usually reduced which would cause the engine to run lean so no smoke.
If the air side of the equation is OK then the other reason for smoke would be that too much fuel is being injected. Have you checked the connector to the high pressure fuel rail. These can get corroded and a poor signal from the pressure sensor might cause the engine management to think that it has to hold the injectors open for longer than necessary and this would also cause smoke.
Final question - do you have a diagnostic tool of any kind? Some air pressure or fuel pressure data would help a lot.
oxygen
Active Member
Thanks for answers.
Blodge, i hear same whistle as well, but sound coming from belt side. So, probably tensioner. I checked and replaced all vacuum hoses. No vacuum leaks at all. I tried to start car with intercooler hose removed- then when i press accelerator a little i feel rough revving. MAF- new. Boost solenoid- new. Vacuum servo- tried another with no success. Interesting thing: if i connect turbo actuator to vacuum directly without boost solenoid- "arm" of actuator goes to lower limiter. When actuator connected to vacuum pump via boost solenoid- "arm" on the half on way. I posted video before, so maybe someone with td4 could check how they arm moves from start to revving up to 3.500 revs. All intake manifold gaskets new. EGR fully closed. Checked all connections from solenoids, sensors (fuel pressure as well) to ECU- zero ohms, so, problem somewhere else.
Car starting very good, i feel that some cylinders one second not working, but it can be plugs. And, i can see some unburned smoke right after start for some minutes. Maybe leaking injector? Or pressure too high?
Blodge, i hear same whistle as well, but sound coming from belt side. So, probably tensioner. I checked and replaced all vacuum hoses. No vacuum leaks at all. I tried to start car with intercooler hose removed- then when i press accelerator a little i feel rough revving. MAF- new. Boost solenoid- new. Vacuum servo- tried another with no success. Interesting thing: if i connect turbo actuator to vacuum directly without boost solenoid- "arm" of actuator goes to lower limiter. When actuator connected to vacuum pump via boost solenoid- "arm" on the half on way. I posted video before, so maybe someone with td4 could check how they arm moves from start to revving up to 3.500 revs. All intake manifold gaskets new. EGR fully closed. Checked all connections from solenoids, sensors (fuel pressure as well) to ECU- zero ohms, so, problem somewhere else.
Car starting very good, i feel that some cylinders one second not working, but it can be plugs. And, i can see some unburned smoke right after start for some minutes. Maybe leaking injector? Or pressure too high?
oxygen
Active Member
Somebody tried this with Freelander?
Amazon product
Amazon product
oxygen
Active Member
Replaced 4th injector. Maybe engine works better but problem of unburned fuel smoke still exists.
Seems there is too less air for burning fuel.
I want to ask one more time:
Could somebody check (better- make video) how works they turbo actuator arm after engine starts. My actuator arm always near middle, boost solenoid new. This info for me would be super. Maybe new boost solenoid is bad.
Seems there is too less air for burning fuel.
I want to ask one more time:
Could somebody check (better- make video) how works they turbo actuator arm after engine starts. My actuator arm always near middle, boost solenoid new. This info for me would be super. Maybe new boost solenoid is bad.
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oxygen
Active Member
Today i disconnected maf, absolutely same.
Now situation maybe more clear:
Car starting nice, when cold- i can make revs higher without any strange smoke.
When engine getting warm- between 2000 to 3500 revs i feel misfires, after misfires unburned fuel goes to hot exhaust manifold and makes smoke.
Probably now i will take all injectors to bosch service for testing, if they ok- will measure compression.
Strange thing, seems Rover L and K series are not problematic engines at all.
Now situation maybe more clear:
Car starting nice, when cold- i can make revs higher without any strange smoke.
When engine getting warm- between 2000 to 3500 revs i feel misfires, after misfires unburned fuel goes to hot exhaust manifold and makes smoke.
Probably now i will take all injectors to bosch service for testing, if they ok- will measure compression.
Strange thing, seems Rover L and K series are not problematic engines at all.
oxygen
Active Member
TD4 still in garage. All injectors tested and are good, in specifications. Installed them back with new copper o-rings. Car still makes unburned fuel smoke, after 1800 revs works rough.
I tried all possible things, except compression testing (but car starts good, so it would be strange), and timing (maybe fuel injection too late?).
Now i'm thinking, maybe it could be Crankshaft position sensor ?
I tried all possible things, except compression testing (but car starts good, so it would be strange), and timing (maybe fuel injection too late?).
Now i'm thinking, maybe it could be Crankshaft position sensor ?
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