So my friends 93 Del sol is in the hop and it has a 94 GSR motor. Upgrades are skunk2 intake mani and Greddy header. After they installed the intake mani the car will no longer go into Vtec.. just looses power. Checked to see if it was throwing any codes but its not. Knock sensor has been replaced already. Clueless as to what else to check. If anyone has any ideas let me know thanks a lot...

edit: forgot to mention car was running fine until recently. It has the GSR ecu also and problems didnt arise til intake mani was put in. Everything seems to be in order.

James