Hey all, I am hoping to get some advice on the wife's "trusty" 'ol LS. Here's a little bit of backstory:
It's an 06 LS 3.9 with about 70K miles. Last summer we were getting the dreaded ETC failsafe mode and the car would not move at all. After using my scanner with live data I determined that the A/B of the TPS were not correlating. I replaced the the TPS and it was great until the fall. The 'ol ETC failsafe mode came up yet again, but the car was driveable (albeit at a slow speed). With all of the research about the coilpacks I replaced all 8 plugs and coils and it has been running just fine until last week.
Last week the check engine light came on while the wife was on her way to work, with no other symptoms. She drove it home with the light on all the way, with no other symptoms still. As soon as I got home I grabbed my code scanner and started the car where I was greeted with the lovely beeping coupled with ETC Failsafe and Service Parking Brake. I am getting codes P2100, P2107, and P2110 - with zero throttle response from the pedal. I have tried clearing the codes and even disconnecting the battery to no avail. One thing that I can note is that if I clear out everything, and turn the key on (without starting the car even) I am getting ETC failsafe. In digging deeper, I pulled off the throttle boot and have tried watching the throttle blade. I seem to remember (could be wrong) that as soon as you turned the key on, that the throttle blade would "bounce" a few times as sort of a self test - which it is not doing at all now. If this is the case, I am thinking that the throttle body may have bit the dust here.
Are there any tests that I can do on the throttle body itself or the harness going to it that would help me verify that it is the throttle body that is bad? Am I correct in assuming that I probably don't have another bad coil since the ETC is coming up without even attempting to start the car? I would think that there would be no voltage applied to the coils at key on engine off, so they wouldn't be generating any RF noise at that time.
I appreciate any insight that anyone has to offer with this issue! I also apologize for the lengthy post, but I figured it's best to start with what has been done already!
It's an 06 LS 3.9 with about 70K miles. Last summer we were getting the dreaded ETC failsafe mode and the car would not move at all. After using my scanner with live data I determined that the A/B of the TPS were not correlating. I replaced the the TPS and it was great until the fall. The 'ol ETC failsafe mode came up yet again, but the car was driveable (albeit at a slow speed). With all of the research about the coilpacks I replaced all 8 plugs and coils and it has been running just fine until last week.
Last week the check engine light came on while the wife was on her way to work, with no other symptoms. She drove it home with the light on all the way, with no other symptoms still. As soon as I got home I grabbed my code scanner and started the car where I was greeted with the lovely beeping coupled with ETC Failsafe and Service Parking Brake. I am getting codes P2100, P2107, and P2110 - with zero throttle response from the pedal. I have tried clearing the codes and even disconnecting the battery to no avail. One thing that I can note is that if I clear out everything, and turn the key on (without starting the car even) I am getting ETC failsafe. In digging deeper, I pulled off the throttle boot and have tried watching the throttle blade. I seem to remember (could be wrong) that as soon as you turned the key on, that the throttle blade would "bounce" a few times as sort of a self test - which it is not doing at all now. If this is the case, I am thinking that the throttle body may have bit the dust here.
Are there any tests that I can do on the throttle body itself or the harness going to it that would help me verify that it is the throttle body that is bad? Am I correct in assuming that I probably don't have another bad coil since the ETC is coming up without even attempting to start the car? I would think that there would be no voltage applied to the coils at key on engine off, so they wouldn't be generating any RF noise at that time.
I appreciate any insight that anyone has to offer with this issue! I also apologize for the lengthy post, but I figured it's best to start with what has been done already!
