06SilverG85
05-24-2009, 05:39 PM
First off, I have searched and searched trying to find problems similar to mine and I'm still scratching my head. Car is an 06 SS/SC with 80k miles.
First off, the engine started losing power under hard acceleration above 3500 rpms. This would cause the engine to start to buck. I naturally brought it back to idle and it idled very rough and varied between 1200 and 500rpms. I think got a CEL and went into reduced engine power. I wasn't able to get the engine codes at that point. Clearing the CEL and reduced engine power, the car is entirely driveable below 3000 rpms with very slight throttle application.
Now the other day I was able to get my Tech 2 and monitor the car. Of course now the engine didn't act the same. I revved it up past 4000 and felt the immediate power loss, but I also started to hear a sharp clattering sound as well as a weird sound out of the intake as if the supercharger was laboring to go faster. I let off as soon as I heard the loud clattering and the engine died. I got codes P0068 Throttle Body Airflow Performance and P0101 Mass Air Flow Sensor. I cleared the codes and was driving on the highway when it started to lose power entirely and blow smoke out the exhaust. After clearing the codes, the car was again driveable with part throttle. I did notice while babying the car around, my coolant temperatures are elevated. Running 180 while moving, but it quickly jumps to 200 whenever I stop (faster than it normally rises).
I really have no idea whats going on with it. I cleaned the MAP, SCIP, TB, and MAF and reinstalled them. Monitoring them with the Tech 2, none are throwing out crazy readings. Testing the car in the driveway after cleaning those sensors, it does the same clattering noise and loss of power, except now I can't get any CELs. I can gingerly give it throttle and it will rise up to 5500rpm before it starts to die and the rpms come down even with the same throttle applied.
All help is really appreciated. This is the first time I've ever had problems with the car and its really shaking my confidence in it. That clattering noise is scaring me, I am hoping it isn't anything terminal as its not repeatable at the same RPM. I'm wondering about the throttle body, the boost bypass valve or even maybe the supercharger clutches...
First off, the engine started losing power under hard acceleration above 3500 rpms. This would cause the engine to start to buck. I naturally brought it back to idle and it idled very rough and varied between 1200 and 500rpms. I think got a CEL and went into reduced engine power. I wasn't able to get the engine codes at that point. Clearing the CEL and reduced engine power, the car is entirely driveable below 3000 rpms with very slight throttle application.
Now the other day I was able to get my Tech 2 and monitor the car. Of course now the engine didn't act the same. I revved it up past 4000 and felt the immediate power loss, but I also started to hear a sharp clattering sound as well as a weird sound out of the intake as if the supercharger was laboring to go faster. I let off as soon as I heard the loud clattering and the engine died. I got codes P0068 Throttle Body Airflow Performance and P0101 Mass Air Flow Sensor. I cleared the codes and was driving on the highway when it started to lose power entirely and blow smoke out the exhaust. After clearing the codes, the car was again driveable with part throttle. I did notice while babying the car around, my coolant temperatures are elevated. Running 180 while moving, but it quickly jumps to 200 whenever I stop (faster than it normally rises).
I really have no idea whats going on with it. I cleaned the MAP, SCIP, TB, and MAF and reinstalled them. Monitoring them with the Tech 2, none are throwing out crazy readings. Testing the car in the driveway after cleaning those sensors, it does the same clattering noise and loss of power, except now I can't get any CELs. I can gingerly give it throttle and it will rise up to 5500rpm before it starts to die and the rpms come down even with the same throttle applied.
All help is really appreciated. This is the first time I've ever had problems with the car and its really shaking my confidence in it. That clattering noise is scaring me, I am hoping it isn't anything terminal as its not repeatable at the same RPM. I'm wondering about the throttle body, the boost bypass valve or even maybe the supercharger clutches...