ok i swapped out the stock gsr IM and put in a Blox IM, now i plugged in a P73 ecu and there is no vtec now, i also tryed pluggin in a kenji chip ecu P06 with a single runner and a type-r maps still no vtec? ok but when i plug in the gsr ecu the freakin vtec works what is going on?....could it be my knock sensor some times it throws a CEL?..i just replace the TPS sensor, it was cracked, broke one of the silver tab(pin) inside, could that sensor not engauge vtec? if anyone could shed some light on this. thanks

 

Do you have a JDM or USDM engine? JDM engines do not use an oil pressure switch for VTEC and the USDM's do. IF you have a JDM engine and the ECU you have is from a US car, you will not get VTEC unless you add the pressure switch. I'd start there...

 

no i have a usdm b18c and the ecu is jdm but before i changed the IM i tryed the p73 and the vtec did work so but this is all before the knock sensor was going bad?
could a bad knock sensor make the p73 to not engauge vtec?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hYbRid_Eg6 &raquo;</TD></TR><TR><TD CLASS="quote">no i have a usdm b18c and the ecu is jdm but before i changed the IM i tryed the p73 and the vtec did work so but this is all before the knock sensor was going bad?
could a bad knock sensor make the p73 to not engauge vtec?</TD></TR></TABLE>

yes, a bad knock sensor can make vtec not engage

 

ok i'll try to get a new knock sensor and try again.

 

ok i unpluged the knock sensor and there was a pressure that came out is that suppose to happen? well repluged it back and started the car and no CEL, drove it a couple of days still and no CEL, swap out ecu and put in the p73..well the vtec kick in, it felt so good, i can tell that i lost a lil low/mid power but top end is great!! i need a set of cams thanks for your guys help.