Valve rattling would be a separate problem, mostly due to oil problems but if the valve lifters are not working correctly with excessive noise, that can cause erratic idling and loss of performance.
How did you move the TPS? They are calibrated during installation and if it is the adjustable type, tampering with it can result in wrong signals being transmitted to the engine computer causing idling, startng and performance problems.
Disconnecting it does not really prove anything as the engine computer is programmed to guess the TPS position when signal from it is missing.
When doing diagnostics, guessing does not work. You need to start from possibilities and eliminate them systematically.
Wednesday, September 19th, 2012 AT 9:04 PM