Hey guys, I have a 03 1.8T with APR stage one plus, last night i was driving from a stop sign and all I heard was a pop then I lost a lot of power. If I try to hit the gas pretty hard all I could hear was a very loud hissing noise coming from the back of the engine bay. So this morning I drove it and it was better but still had that noise, could it be a check valve? I looked at them and they seemed fine. What would cause a vacuum leak at the back of the engine? Thanks!

 

theres a pankcake valve back there that cracks and losses pressure. Should be almost right ontop of the temp sensor flat on top. Check around that for cracks.

 

Do a boost leak test to find where it is coming from if you can't find it.

http://www.a4mods.com/index.php?page...tml&category=5

 

found the problem guys, turns out that the shop who switched out my fuel injectors didnt bolt them down, so fuel was spraying everywhere, I am lukc my engine did not go up in flames, you think there should be any recusion to this as far as saying something to the shop that didnt do it?

 

I would go back to the shop and ask for AT LEAST a partial refund since that is a major safety hazard. If somthing had happened due to the fuel rails not being installed properly, it would have fallen entirely on the shop.

 

wow thats a pretty big thing to forget to do.