Vtec not engaging after tranny swap?

[devstar66]

hey whats up guys so i recently swapped my tranny out and made it 5spd but now i get no vtec anymore before it used to engage at different points now i dont get anything anyone know whats up with that?

oh FYI i had to get a new ICM as well mine failed shortly after the swap

[deevergote]

Is your CEL on? If so, VTEC will usually not engage.
Is your oil level low? Is the engine fully warmed up?

[devstar66]

oil level good and no CEL

[Losiracer2]

speed sensor is working? I know when I put my JDM M2B4, it came with a bad VSS and if the speedometer isn't working the VTEC won't engage at all.

[HATCHing]

Did you swap to a manual ecu as well?
What engine? ecu you running? vtec cross over point?

[devstar66]

JDM H22A i havent swapped the ecu still runing auto one ECU is a P13

[devstar66]

speed sensor is working? I know when I put my JDM M2B4, it came with a bad VSS and if the speedometer isn't working the VTEC won't engage at all.

spd sensor was unplugged but i connected it still no vtec what im wondering is when i used to floor it when i had the auto maybe i thought what was vtec was actually my auto tranny pulling

[pedroalcala]

the ecu, even if auto or 5speed, dosent have to do anything with vtec...it wil still engage.

try checking if you ECU will even get vtec to kick in, i know that my ecu was from an auto and vtec wouldent kick in. Then i tried a different ECU and it worked! (was from a 5speed), but vtec should still work even if the ECU is auto...

[deevergote]

The ECU does have to do with VTEC... just not the difference between auto and manual.

You are letting the engine reach full operating temperature, right? VTEC won't engage if the engine is cold.