bg164

SOLUTION - The IAT sensor had come out, once I put it back in everything was fine.

ORIGINAL POST

Hi, I've got a 2008 W164 with the OM642. I've been fighting a boost leak and have fixed a couple, one at the turbo to charge air pipe connection and another at the connection to the intake manifolds. This morning, it was running great, holding solid pressure and then I hear WHOOOOSSSHHHH and lose power. I've taken the Y pipe off the turbo and connected my boost leak tester plugging up the pipe that comes out of the intercoooler and I can pressurize it up to 25PSI and it holds so, my leak has to be past that. The problem I'm having is I don't know where to plug the system up beyond that to be able to build pressure again. If I remove the cap from the intercooler pipe and reconnect it to the intake, I can't build any pressure at all. Where else can I plug this up to check pressure at least up to the intake?

Thank you!