Are you getting some sort of check engine light? Is it possible the ECU is in limp mode? What ECU are you using and what speed are you going when the VTEC wouldn't engage in 4th gear?
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Andy - Reinstated
Hybrid Forum Moderator
'06 Subaru Legacy Spec B - Stock, for now
'98 Civic EX - CTR headlights and grill, Kosei K1's, for sale
'90 240SX - SR20DET that will never get installed, project car.