stevestorms Posted April 8, 2008 Report Posted April 8, 2008 Hi I have serched the forum and couldnt find any pictures of where this N75 valve is located , has anyone got some or could someone just describe where I will see it as standing at front of car looking into engine bay, thanks for any help, cheers, Steve. Quote
stevestorms Posted April 8, 2008 Author Report Posted April 8, 2008 forgot to say my car is a 51 PLATE TDi :-) Quote
stevestorms Posted April 9, 2008 Author Report Posted April 9, 2008 My car is a 51 plate TDi where can I see this valve from??? just want to check the connections before I replace it Quote
ondra Posted April 9, 2008 Report Posted April 9, 2008 It is number 21/23 in the picture marked with blue arrow. Before you replace it give it a good clean it might help.. Quote
stevestorms Posted April 9, 2008 Author Report Posted April 9, 2008 Hey, thanks thats a big help :16: Quote
Smilge Posted April 9, 2008 Report Posted April 9, 2008 Steve I assume you are talking about the Turbo Boost Control Solenoid, if so, if you look centrally behind the engine on the bulkhead you'll see an aluminium shroud with three nuts. It's behind there so you'll have to remove the shroud to get to it. Quote
ondra Posted April 9, 2008 Report Posted April 9, 2008 Sorry Steve, Bleeno's right I pointed to MAP sensor. What are your symptoms anyway? Quote
stevestorms Posted April 9, 2008 Author Report Posted April 9, 2008 Ahh yes thanks guys im learning quickly :-) still I gave the other jobbie I nice clean will try and locate the boost jobbie thanks Quote
stevestorms Posted April 9, 2008 Author Report Posted April 9, 2008 symptoms are the car has done the usual boost working fine then I have nothing and after a trip to Oxford it went on the way home normally as stated many a time by lots of people turn off the ignition and then on again and its fine but for the past week I have nothing no boost atal it might think about it when you first set off in 1st maybe second gear then nothing and I have just tried it today and there is no boost atal, my friend has 2 Golf GT Tdis and he has replaced the boost solinoid on both his cars so I guess the Moneys on this? Quote
stevestorms Posted April 9, 2008 Author Report Posted April 9, 2008 Wow can see the aliminium cover! how do you get to that??? do you have to do it from under the car or do remove something to gain access? Quote
ondra Posted April 9, 2008 Report Posted April 9, 2008 I, ve had the same problems, and it was a vacuum hose from actuator on the turbo to the N75. If you have got car ramps, you should be able to check the connection from below without taking the undertray off the car. Quote
Smilge Posted April 9, 2008 Report Posted April 9, 2008 (edited) No, you can get to it from the top ...just remove the plastic engine cover and reach back, hee hee ...... Good tip though .... put something like a towel underneath the area of the solenoid to prevent the nuts from dropping down the back when you undo them. First things first ...... check the filter from the solenoid behind the MAF area, again on the bulkhead. Secondly, check all the pipes to from the solenoid paying particular attention to the one that goes to the VNT diaphragm which controls the VNT actuator that opens up the Turbo vanes. Have a search on VNT and this will give you an idea what I'm on about. http://www.fordgalaxy.org.uk/ford/index.ph...=62&t=5921# ......... have a read as you'll find it useful. Edited April 9, 2008 by Bleeno Quote
stevestorms Posted April 9, 2008 Author Report Posted April 9, 2008 Thanks you 2 will give it a whirl main ford agent has quoted Quote
Dodger Posted April 10, 2008 Report Posted April 10, 2008 I recently fixed my turbo by replacing the N75 valve. Symptom was no boost until about 3000rpm and tripping into limp mode when trying to pull up any hill. There are 3 pipes to the N75. What I did was: 1. Connect an extension pipe to the pipe that goes from the N75 to the turbo and try to blow down it. It should be air tight. If you can blow down there is a leak.2. Idle the engine and put your thumb over the pipe that supplies vacuum to the N75. Leave your thumb on it for 10 seconds or so and you should be able to feel the suction. When you take your thumb off you should hear a definite intake of air.3. Inspect the pipe that lets atomospheric pressure air into the N75. If it's damaged there's a chance that pieces of rubber tube have been sucked into the N75 blocking it.4. Disconnect the lead to the N75, idle the engine and measure the voltage. My meter read 9 volts. If all the above checks out then it's either a bad N75 or the VNT vanes on the turbo have got stuck. New N75 from Ford dealer cost Quote
stevestorms Posted April 20, 2008 Author Report Posted April 20, 2008 Thanks for that check list, I will try and run through that---but which one is the N75 VALVE?? THERE ARE 2 ! a left and a right behind the aliminium heat shield they both look the same :-( Quote
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