jumpy tach and sputter
 

so last week i took my car out for the summer turned on fine as i moved it i stalled wouldnt start back turned out it was the dizzy went to the jdm shop baught a brand new put it on ran fine for the first day next day when i took it out it was sputtering and the tach was jumping everywhere when i press on it plugs are new some said maybe injectors but got brand new grams injectors only 2000-3000km on them or fuel pump but the was changed last year to car was tuned last year never did this before im not sure where to start looking