i swapped a b16a2 from an em1 into an ej8, im using the p2t ecu with the wiring harness off the b16. the car i swapped it into didnt have vtec, and i was wondering if i had to phisically wire up for vtec. ive seen threads on here with the exact pinouts on the ecu, but i couldnt find any. could someone plz post up the link. thnx

 

yes you have to physically wire the vtec IF your engine harness came from a non vtec motor.. meaning using a separate wire line and wiring that directly to the ecu.. if its a jdm ecu then only the vtec solenoid needs to be wired. If its a usdm ecu then the vtec pressure switch and the vtec solenoid needs to be wired..

96-98 civic = http://www.phearable.net/tech/wiring/wiring.96-98_2.jpg
99-00 civic = http://www.phearable.net/tech/wiring/wiring.99-01_2.jpg

 

you have to do that eventhough both the harness and ecu are both already wired for it?
i dont know so im just asking

 

ooops.. sorry about the first post let me correct myself.. you only do the vtec wiring and the other mods IF your wire harness came out of a non vtec motor mostly single cams..

if you already have a engine harness that came out of a vtec motor then you dont have to worry about wiring it.. unless you have a jdm engine and running a usdm ecu then the CEL will come on for VTPS or vtec pressure switch because the jdm engines dont use VTPS.. theres also a trick to bypass this method..

http://www.phearable.net/tech/wiring/vtpsbypass.gif

 

For original poster.. YOUR FINE. Use that b16 harness and you shouldnt have to think about wiring anything.. it will all work fine.. If you get any check engine lights then come back and tell us.

 

yea, im using the harness that came withe b16. i was just wondering cause my friend basically has the same swap, and u can defenatly tell wneh vtec hits.

 

you cant tell on yours? any check engine lights? is your speedo working? put it on second gear and hold it until around 5000rpms and see if you hear a difference.

 

cel is on, my speedo isnt working and thats because i need a vss, but i didnt know that that had anything to with it

 

Bingo! thats your problem. Vtec doesnt work if your speedo isnt working. Besides you dont have a VSS thus your speedo isnt working. You need to find a VSS asap and THEN vtec will work I guaranteed it!

 

+1

To further explain, VTEC won't engage if you are below a certain speed. Since your VSS is missing or whatever, the ECU doesn't know how fast you are going and thus VTEC won't engage.

 

thnx guys im going to order one from autozone asap

 

just got the vss today and put it on. speedo works and vtec hits hard now.

 

if VTEC "hits hard," you've got some problems.

 

I told you sweety :]