found it. crack in flex section of exhaust manifold. sounded lower down in the exhaust with the heat shields on

No abnormal noises really. I get some pops from the exhaust on decel at times. Under boost I can hear the turbo. When leaving a stop, if I attempt to leave like normal the car almost bogs down. I have to feather the throttle to get the revs up and then continue on. I will double check both vacuum an...

In this log you revved the car stationary... it's really hard to figure out anything from such a log with 500+ rpm increase per log line. And yes it is normal for the ECU to command 100% ebcs duty when you press the acceleration hard until the desired targets are reached. If the car driver and reac...

So I rebuilt the hpfp with all new components. Runs a slight bit better, but not great. I checked all vacuum lines from the turbo to and from the actuator and solenoid, and all seemed good. Here is another log from after rebuilding the pump. I noticed the ecu is commanding 100% ebcs duty cycle as so...

Thanks Mituc. Yes, I noticed the engine temp rising quickly as well. I replaced all timing components when I replaced the head gasket except the variable timing actuator on the intake cam. I will service the hpfp and take a look at the hoses going to the wastegate and solenoid as well, and report ba...

Here's a log from a third gear roll on

I have a '08 MS3 I just replaced the head gasket on. Stock inlet pipe broke so I replaced with JBR pipe and intake hose, but kept stock airbox. The car breaks up on light throttle at low rpms. I have checked for vaccuum and boost leaks and found none. I have no codes. Would I require a tune even tho...