Power out on Free­lander

Land Rover AFRICA Magazine - - TECHNICAL -

I just want to say, I love my mag­a­zine and can­not wait when you go monthly. I have a 2005 Free­lander Td4 with power is­sues. It seems to be fine from pull off but as soon as I reach 100km/h, it seems to lose power. Do I need to re­place the turbo? I have done over 160 000km on the clock.

- Fred­er­ick Bouwer Ed – First check for split turbo hoses. A tell-tale sign for this is ex­ces­sive smoke and a whistling noise. The Td4 has a vari­able noz­zle turbo and is con­trolled by a boost so­le­noid (it is a black plas­tic unit close to the turbo). It ap­plies a vac­uum to the turbo via a small pipe. When the vac­uum is ap­plied, the turbo ex­haust side vanes close, and it uses more ex­haust gas to pro­vide more boost. If the so­le­noid has failed it will con­stantly sup­ply boost to the turbo, op­er­at­ing at max­i­mum boost all the time. The ECU will sense this and at high speeds it will sense the over­boost and cut the fuel in or­der to pro­tect the sys­tem. Test the so­le­noid by pulling off the pipe to the turbo and if you have nor­mal power at high speeds, then the so­le­noid is faulty. It is easy and cheap to re­place. Good luck!

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