B16B VTEC problems??? help please!!!!

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mugenking

mugenking

New Member
I RECENTLY SWAPPED MY STOCK B16A1 W/ A JDM B16B CTR ENGINE INTO MY 99 CIVIC Si, EVERYTHING IS WIRED UP CORRECTLY ALTHOUGH OF COURSE THERE IS NO VTEC PRESSURE SWITCH ON THE CTR SOLENOID, IM NOT GETTING ANY CEL CODES FOR VTEC AND I HAVE TRIED MANY DIFFERENT THINGS W/ THE SOLENOID SUCH AS REPLACING IT WITH A USDM ONE THAT HAS THE SENSOR ALONG WITH MY STOCK USDM ECU BUT STILL NO VTEC!!!!! I AM CURRENTLY TRIENG TO DO A CONTINUITY TEST BUT CAN NOT FIND THE DIAGRAM FOR THE CTR ECU........... ANY COMMENTS WOULD BE GREATLY APPRECIATED
 
Just put a Switch in... Send 12v to the VTEC Solenoid...

You can use a Toggle Switch or a RPM Activated Switch
 
Sol O said:
Just put a Switch in... Send 12v to the VTEC Solenoid...

You can use a Toggle Switch or a RPM Activated Switch
Click to expand...
that still wont be true vtec and i would advise against it
 
Just to see if it works try taking the whole vtec assembly off your a2 and put on the b and use your a2 ecu and see if itll engage.
 
Are you throwing any codes? And if so what are they? Second just for giggles take the solenoid wire and extend it to the positive battery terminal and touch it against it, you should hear it click, (with the car off).
 
pooptugboat said:
Are you throwing any codes? And if so what are they? Second just for giggles take the solenoid wire and extend it to the positive battery terminal and touch it against it, you should hear it click, (with the car off).
Click to expand...

i actually did that yesterday it makes a click and no there arent any cel codes being thrown for vtec
 
Coolant fine?

The ECU looks for a couple of things before VTEC engages(coolant temp and speed IIRC).
 
K2e2vin said:
Coolant fine?

The ECU looks for a couple of things before VTEC engages(coolant temp and speed IIRC).
Click to expand...

if this were the case would it not be overheating??? the car does not overheat whatsoever it runs like a champ except for the vtec not working
 
No. A bad temperature sensor could cause it to not read correctly(IIRC there's two, one is for the gauge cluster and one goes to the ECU). Actual cooling devices (what keeps your car from overheating) are the thermostat(mechanical) and coolant fan switch(pretty much works like the thermostat).

IIRC there may be two of them; one on the side of the block(under the distributor) that goes to the gauge cluster, and one on the thermostat housing that goes to the ECU.
 
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now that you mention it after i swapped it i could not find a spot on the jdm motor for my water temp sensor!!!!! where is it located on the engine??? im throwing a cel code #6 could this be why vtec is not engaging???? isnt the sensor on the the the thermostat housing the fan switch????
 
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K2e2vin thanks a bunch for pointing me in the right direction!!!! i got the vtec working and removed all cel....!!!!! all it took was a simple swap of sensor clips, the vtec presseure switch which does not exist on my new motor is the exact same as the water temp sensor, just swapped them around reset my battery and like magic i have VTEC
 
Glad you got it working.

Yes, code 6 is [FONT=Verdana, Arial, Helvetica, sans-serif]engine coolant temperature.[/FONT]
 
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