GrumpyGel
Well-Known Member
You can usually find them if you follow the exhaust. Unless they are sitting on the workbench.
Thank you
Ian burritt
Active Member
Well, thanks all of you for your inputs.
I`m still learning about my hippo being owned by me now about 4 months.
but thanks must go to the very first well explained post way back awhile
I`m still learning about my hippo being owned by me now about 4 months.
but thanks must go to the very first well explained post way back awhile
Bootes
Member
Hello all, just thought i'd update you on the cause of my lack of power issues with my Td4 03MY in case it helps anyone.
I initially had a split turbo hose whilst on the M6. It was the short 90 deg hose. Symptoms were initially lack of power, and then black smoke and air whistling sounds. Bought a new one of those for under a tenner and fitted it.
Unfortunately it didn't fix the lack of power over 70mph, but at least there was now no smoke. Symptoms now were that on a slight gradient on the motorway the car would start to lose power and thus speed. There was also a slight noise but not the same as the air noise from the split before.
The Td4 turbo is variable geometry and is controlled by the boost solenoid (see black plastic unit in the picture). It applies a vacuum to the turbo via pipe 1 in the photo. When the vacuum is applied the turbo exhaust side vanes close and it uses more exhaust gas to provide more boost.
My solenoid had failed so that it constantly applied vacuum to the turbo, and thus operated it at max boost all of the time. What then happens is that when you get a high speed / load condition i.e. 70mph and a hill, the ecu senses that the turbo is over boosting and derates the engine by cutting the fuel in order to protect it from damage. It will then speed up again when you get back onto the flat.
The solenoid is STC4198, cost £34, took 15mins to fit (don't need undertray off). Fitted and all working perfectly now.
So if you have lack of power on hills at 70mph, try this test. Pull pipe 1 off the turbo and drive a 70mph hill and see if it cures your issue. If it does, voila it's the boost solenoid. With the pipe off it will be a little sluggish at low speed accels as it won't be able to close the vanes for full boost, but it's fine to drive in order to do your 70mph test.
For info pipe 1 is solenoid vacuum to turbo, pipe 2 is vac supply to solenoid from the plastic reservoir at the side of the engine, pipe 3 is the solenoid vent to fresh air via the little filter. Check these for holes as they rub various engine parts. Also worth checking that your boost solenoid filter isn't blocked, as this would prevent the solenoid from releasing the vacuum and cause the same symptom. Fair chance it's ok though and your solenoid is bust.
Good luck !
Wow, just found your post, so informative. Tomorrow weather permitting I'm under 'Bender' again.
Thank you so much.
Hi All,Hello all, just thought i'd update you on the cause of my lack of power issues with my Td4 03MY in case it helps anyone.
I initially had a split turbo hose whilst on the M6. It was the short 90 deg hose. Symptoms were initially lack of power, and then black smoke and air whistling sounds. Bought a new one of those for under a tenner and fitted it.
Unfortunately it didn't fix the lack of power over 70mph, but at least there was now no smoke. Symptoms now were that on a slight gradient on the motorway the car would start to lose power and thus speed. There was also a slight noise but not the same as the air noise from the split before.
The Td4 turbo is variable geometry and is controlled by the boost solenoid (see black plastic unit in the picture). It applies a vacuum to the turbo via pipe 1 in the photo. When the vacuum is applied the turbo exhaust side vanes close and it uses more exhaust gas to provide more boost.
My solenoid had failed so that it constantly applied vacuum to the turbo, and thus operated it at max boost all of the time. What then happens is that when you get a high speed / load condition i.e. 70mph and a hill, the ecu senses that the turbo is over boosting and derates the engine by cutting the fuel in order to protect it from damage. It will then speed up again when you get back onto the flat.
The solenoid is STC4198, cost £34, took 15mins to fit (don't need undertray off). Fitted and all working perfectly now.
So if you have lack of power on hills at 70mph, try this test. Pull pipe 1 off the turbo and drive a 70mph hill and see if it cures your issue. If it does, voila it's the boost solenoid. With the pipe off it will be a little sluggish at low speed accels as it won't be able to close the vanes for full boost, but it's fine to drive in order to do your 70mph test.
For info pipe 1 is solenoid vacuum to turbo, pipe 2 is vac supply to solenoid from the plastic reservoir at the side of the engine, pipe 3 is the solenoid vent to fresh air via the little filter. Check these for holes as they rub various engine parts. Also worth checking that your boost solenoid filter isn't blocked, as this would prevent the solenoid from releasing the vacuum and cause the same symptom. Fair chance it's ok though and your solenoid is bust.
Good luck !
I’ve came across a similar problem with my TD4. The symptoms are similar to those mentioned but are intermittent. I can go driving for an hour, for example, and get away with it without any problems. It can happen indiscriminately at any engine condition. When it does, the old girl goes into a limp mode with no power. I let it idle for a moment and squeeze the go go pedal where it revs sluggishly to approx 2000rpm. Then it bursts into life and can be driven under load. I’ve tried injector cleaner and all sorts as fuel additives. Do you think this could be attributed to an intermittent issue with the boost solenoid?
Thanks for the advice! I’ll get an ecu read through the OBD port. No MIL warning on dash when it starts to misbehave.
Hello everyone. Advice has been amazing so far,thanks very much.I have followed all the tips so far,including cleaning LOADS of gunk from EGR and Manifold.Makes a nice difference, but I still cant climb hills.Freelander 1 2006 model.Startss,idles like a dream.I can rev her up to 5/6 Rpm easily.Pulls away in 1st with loads grunt,but then she wont accelerate .My foot is flat to the floor,makes no difference. I did the turbo test and pulled turbo solenoid pipe off,makes no difference either.Would appreciate some expert advice(new air cleaner installed/new glo plugs/oil filter etc.New fuel pump too.Its a cheap Ridex and yes,it screams like a siren,new Pierburg has been ordered).
Thanks in advance
Thanks in advance
Alibro
Well-Known Member
Probably better to start a new thread for this issue.
andyfreelandy
Well-Known Member
Back to the original thread subject!
Had this problem on a vehicle this week. Cleaned MAP, cleaned inlet manifold, changed turbo solenoid and all good.
My question is:
Do we know how the turbo solenoid works?
It seems that you can blow straight through the failed one, the input and air comes out of servo output. Didn't check the replacement but does it close with a signal or close without a signal? Anyone know what the supply voltage looks like?
Thought I'd make a test rig to test them.
Had this problem on a vehicle this week. Cleaned MAP, cleaned inlet manifold, changed turbo solenoid and all good.
My question is:
Do we know how the turbo solenoid works?
It seems that you can blow straight through the failed one, the input and air comes out of servo output. Didn't check the replacement but does it close with a signal or close without a signal? Anyone know what the supply voltage looks like?
Thought I'd make a test rig to test them.
