Issue: Netural coasting at any speed, high idle 2K rpms, until a dead stop, idle is back to normal: 650.
Troubleshooting:
TPS: switched out with ported TB, checked the % using HP tuners..
Close: 20%
Idle: 15%
High Idle 2K rpms: 22% <---Can happen while turn on of the car, with 176 temp, rev up the engine, rpm will stay stuck above 2K
TPS: back to stock <<<<------ same as above..
Fuses: Removed the ECM fuses from the engine bay and below the passenger dash, turn on, reached 176 temp, turn off and then turn on again, ====same issue...
Pedal: Changed the pedal: same issue
Why the change: because I saw Pedal 21% and TPS 21% while high idle, either moving or not moving the car...
ECM: Checked for loose connection <---sucker is very tight..
Reflashed the ECM using stock configuration, no change, change MAF to stock and Stock TB same issues, Stock MAF with ported TB same issue..
Check my buddy's corvette: Auto 2007 vette, pedal % and TPS % is the same normal temp, 19% if you want to know..
Checked for leaks using a smoke machine.. no joy,, no leaks http://www.hptuners.com/forum/images/smilies/crazy.gif
Changed the PCV plastics to actually vacuum lines, no joy.. covered all vacuum lines using a golf tee.. no joy...
I have looked everywhere expect for change the ECM... how many of you will change the ECM after everything...
oooo by the way I have not gone to the dealership to complete the Idle relearn,, that will be monday... i'll let you know what happen...
If after that does not fix it.. then I have to order an ECM and replaced and reflash it <<<---- I dont think I have to do that.. but I may have tooo