Any sifu here can tell me whether proton wira 1.3 can install tachometer in it?? I installed an external tachometer and the reading is realli unstable wen i start the engine it is almost 2k~3k rpm... wen i rev a little bit straight jump till 6k rpm == the ppl who install it told me tat it is normal cuz i don hav original rpm meter... any sifu here can teach me how to resolve the prob? T_T if not my $$ fly away. THX!

Realli? == the mechanic check all the wire n told me thy cant take reading frm carburetor so thy plug the wire bhind the dashboard n the reading is so inaccurate...