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I use a large old screw driver with a slot ground in the end to release the stuck waste gate valve, this fits over the actuator rod to stop it slipping off. You can just see the rod and lock nut in the above picture. The waste gate actuator and rod are located behind the turbo (300 Tdi). If the waste gate is stuck shut it will cause the engine to over boost, and in turn damage the engine.
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This usually happens if the engine has not been run for a while. The picture shows the waste gate arm, it’s not very clear to see as its behind the turbo.Ī common fault with turbo charged engines is a stuck waste gate valve. I have never fitted a boost controller to any of my previous Land Rovers, so to put it to the test I have fitted one to our Discovery so I can assess whether they are worth fitting or not. I have heard many mixed reviews on this subject, if you search on the many Land Rover forums you will find tonnes of mixed opinions. The next part of this post covers fitting a Turbo Boost Valve. You can see that the plunger is now 90 deg turned to the right and that the diaphragm sits much lower in the housing, refit the cover and 4 screws.Īfter this work was completed, I took the Discovery for a drive to see what difference altering the injector pump had made, I can say that it’s like driving a different car, a much faster one at that! You will see it has an eccentric (off-centre) tapered shaft, refit the plunger with deepest off set towards the front of the engine, this will give maximum fuel boost, if there is too much black smoke you can turn the plunger back a bit. This is the plunger, on the back of the diaphragm. You need to turn the wheel clockwise to screw it down, use a flat blade screw driver and adjust until you have 4mm less rise, you can use a steel ruler to measure this. Now you can see the toothed adjuster wheel, this alters the spring height for the diaphragm. So in order to make this adjustment you need to mark the steel washer for its vertical position and now carefully remove the diaphragm and plunger, don’t lose the nylon spacer or spring! Now you can see the diaphragm, you will see that the diaphragm sits about 7mm away from the housing, it is this gap that needs adjusting, about 3mm is needed.
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You need to make sure that your Tdi is in good condition and the Cam belt has been changed at the specified service times, next you have to check what type of injection pump is fitted to your Tdi, your pump must have the square diaphragm housing as shown in the picture below, some later 300 Tdi’s have electronic control and must only be tuned by electronics like a plug in chip.įirstly you have to unscrew the 4 screws, you can leave the boost pipe on.
#Does apr tune make turbo spool earlier how to#
This is a subject I am asked about a lot, so in this post I will show you how to make your sluggish Tdi go like a chipped engine, with out the use of any electronics.įirstly you need to check a few things about your engine. Today’s How-to is all about Land Rover Tdi Tuning.