Lack of JTD power problem solved!!!
Iím a first time caller long time listener. Just thought Iíd share my problems and solution to the JTD lack of power reoccurring problem thatís hitting 147, 156 and GT owners.
I started getting a lack of power under 2500 revs about 2 months ago followed by the engine management light switching on when I revved above 3000 rpm and I could not get any power on motorways.
So using this brilliant forum I found out how to:
Clean the EGR valve
Clean the MAF
Check all the pipesÖetc
Basically all the suggestions on the forum I tried but non made a massive difference.
Anyway Iíll get the point while attempting to clean the VNT solenoid I checked the very thin rubber piping for leaks and on first inspection it looked fine however for some reason I checked further down the pipe that leads to the turbo and this is where I found a tiny split in the pipe. The pipe in question leaves the VNT solenoid then joins a metal pine that leads it passed the radiator then another rubber pipe connects into the turbo I presume this is so a rubber pipe is not touching the warm radiator. Where the small rubber pipe joins the metal pipe this it where I found the split and not just at the top when I inspected underneath the car the end that connects to the metal pipe leading to the turbo also had a split!
Now Iím no expert I work in and office and manual labour is a swear word to me but I presume that the turbo is being told by the VNT via the ECU that X amount of pressure is coming from the engine but the air doesnít reach the turbo at X pressure it reaches it at Y pressure so the turbo tells to ECU that there is a conflict and guess what motor system control error (or maybe Iím completely wrong)
Either way untilI can get some replacement rubber pipe I have sealed the splits with insulation tape the duck taped over the top. Took the car out for a spin and instantly my baby was back in action!!!! That was Monday only used the car say 5 times since then but tonight (Wed) the car decided it was very happy and cleared the go to dealer fault code off the display so not only do I have full power back I donít get beeped at every time I get in the car.
For all you having the same problem I hope this helps
(PS the VNT solenoid is very easy to get to its located at the very front of the engine bay bolted just above the radiator just to the left of the bonnet catch. You will see a small black pipe coming from the top of the engine into the solenoid and another leading off to the metal pipe in front of the radiator.)