Quote Originally Posted by scttydb411
vtec controller wiring harness must be removed. map and vtec wires at the ecu must be re-connected (they get cut and run through vtec controller).

4200 is really low especially if the ecu hasn't been tuned. the tach jumping around sounds like a bad icm/dist. try changing w/ a known good dist and get it tuned.

i'm assuming you don't have any cel. if you do fix those first before doing anything else.
i bought a new ecu its doing the same thing. i ran it out the track friday and it was cuttin out bad. i dont know what it could be but it had no power the rpms where going all wack but i figurad it would of ran faster then 10s lol. my buddy has a stock single cam 4 door civic running 10.5 in the 8th so something is wrong