hi mates...
few days ago my car jumped on a speed hump...
yea that was my fault i didnt see it...
muffler has a crack and sounds like a fart can now...
apart from that a thing came up later this week
the tachometer is dancing sometimes at the beginning of this drama,
it's like the pin dances/jumps around the actual rpm i m doing but not lower than that.
i thought it was some electrical issues at first...
now it has developed to miss-firing when i push it hard when warmed up,
it idles fine but it did stall once when i was crusing at 100ks.
vtec still kicks in fine but i can feel there's a flat spot/choking at abt 4500rpm...
anyway, no clue on wt's going wrong.
dizzy? spark lead? ECU? vacuum leak?
any replies will be highly appreciated.

cheers,
derek