My 04 950 has developed an intermittant backfire, usually at about 3800rpm, just as I begin to roll on the throttle in the apex of a corner. It's not a miss but an actual backfire. Upon testing the TPS, I find that the voltage is all screwed up. My voltmeter reads 4.4 volts at a throttle closed position and 1.1 volts at full open. The book says .6 volts at closed and 3.6 at full open. Anybody else had troubles with the TPS? I had a Yamaha WR400 that had a TPS go out, but it was a lot more evident than this. Anyway, I ordered a new TPS, just wanted to compare notes.