i've been rebuilding my '97 gsr(from a wreck) and ran into a new problem. i've just about got everything back together and running well...until now. Here's the problem: When v-tec engages (around 57-5900, I'm assuming a little late, b/c it's stock and hasn't ever been tuned...150k miles) the tach needle jumps from 6 to 7000 and kind of bounces around. At the same time the needle jumps the check engine light, on the dash, start surging/flashing. The only reason the CEL is on is, b/c the o2 sensors are not installed. Important fact: the car still pulls hard throughout the entire powerband, so I'm assuming v-tec is still working. The car has been running well for a couple of months, since i put it back together. this just came out of the blue. Any thoughts? Thanks.....