Audi TT V5 Turbo
Car misfiring and the engine wiring loom needs to be replaced as it's burnt. The mechanic will be replacing the air flow meter, which will make it better. Not sure whether I should sell it or try to find a wiring loom new or secondhand and have it installed. Please help
Check the loom on eBay. Should be available but be sure of the year and model
I think you should go for manual first after that it would be easy for you to solve your problem. I had visited this site past 2 months before for my vehicle and find it quite helpful may be you will also get something useful here
2001 Audi TTCoupe Workshop Repair Service Manual PDF Download
SOURCE: 2001 Audi TT - feels as if the turbo doesn't kick in???!!!
If you are shuddering, it's the MAF or bad spark.
If you have no boost, it can be many things.
-Vacuum Leak
-Bad MAF (ebay has them for us$90, just make sure you get the exact p/n)
-Bad wastegate controller (N75)
-Bad wastegate actuator (the actual wastegate valve, or the vacuum controlled plunger)
-Bad or stuck Blowoff/Diverter Valve
My TT just had the weirdest of "no boost problems". it would throw a code, saying the wastegate was stuck open, and i would have no boost. If I disconnect the battery and reconnect after 5 minutes, i would have full boost; and everything would work great for anywhere between 20 minutes-10 days!
It turned out to be a dirty Boost Pressure Sensor (aka Thrust sensor). It is a $130 part. I finally found the location of it on my 2001 TT Quattro (AMU), it's just below and in front of the battery between the driver's side intercooler and the intake manifold, connected to a hard black plastic intake pipe. It is held on with 2 silver-colored torx screws. It has a connector that gets plugged-in facing the passenger side of the car. Once you pull it off, you will see it has a funnel shaped tip. I took it off the car and poured isopropyl alcohol (99%) into the inlet hole on the funnel shape. I shook the alcohol around and then shook it out. I let it dry, put some silicone grease on the seal, and hooked it back up. The car has been working great so far. If it starts having problems again, i am just going to throw in the $130 new part, and hope for the best.
SOURCE: Audi TT 2004 1.8 turbo auto tiptronic transmission
It is not recommended by the manufacture to change it,They say it is lifetime fluid.
SOURCE: Need help with Audi A4 2000 1.8t Misfiring and Fuel/Air Problems?
replace the speed idle sensor
SOURCE: I have a 2001 Audi A6 2.8 Quattro that needs new oxygen sensors
YOU HAVE 4 OXYGEN SENSORS AND IF YOU HAVE A 2.7T YOU WILL HAVE TWO EXHAUST TEMP SENSORS ALSO . GET THEM FROM AUTOHAUSAZ.COM
Check the wiring to the coil
Check to make sure the fuel injector is working properly.
Check compression on the cylinder
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