my 93 civic cx w/200,000miles needed a new motor. so i bought a d15b sohc vtec to replace my tired d15b 8 valve .the old motor was 70 horse. the new one is supposed to be 125,or the equivalent to a d16z6. i bought a wiring harness from a 95 ex to hook up vtec. i also bought a p28 ecu with the skunk2 program. header and msd sci ignition and ss coil. needless to say the car is not very quick and when i hit 6500 to 7000 rpms the cel comes on. until you turn the key off and then turn on the cel is gone. i replaced the vtec solenoid and still the same problem.a friend of mine has a 93 del-sol si with a stock d16z6 and it runs way stronger than mine. i dont think my vtec is working. slow civic in ky.

 

wire up vtec soleniod, vtec pressure, and knock sensor. you need to run these wires to the ecu.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by UNKNOWN_MEMBER &raquo;</TD></TR><TR><TD CLASS="quote">wire up vtec soleniod, vtec pressure, and knock sensor. you need to run these wires to the ecu.
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you need to run the wires from the shock tower to the ecu, also there is no Knock sensor, so don't waste your time with that one.

gl

 

vtec solenoid-A4
vtec pressure-D6

hope that helps

 

i did hook up the the 2 wires. vtec solenoid,yellow/green to a4 on ecu and vtec oil pressure switch blue/black d6 on ecu side. i used 18 gauge automotive wire to do this with liquid electrical tape then heat shrink tube then liquid tape again

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93civichat*****y &raquo;</TD></TR><TR><TD CLASS="quote">i did hook up the the 2 wires. vtec solenoid,yellow/green to a4 on ecu and vtec oil pressure switch blue/black d6 on ecu side. i used 18 gauge automotive wire to do this with liquid electrical tape then heat shrink tube then liquid tape again</TD></TR></TABLE>

maybe the chip in the ecu is bad also. what is the chip for 1.8 or 1.6. get another chip for your motor and try it out

 

i tried my ecu in my friends stock 93 del-sol si and you could really tell a difference the vtec pulled hard from about 5000 on. we put his ecu in my civic and still the same . no vtec . its like driving a d15 non vtec

 

maybe ur wires are bad then? try gettin new wires......if ur vtec isnt kicking in then ur gona have to go b ack and double check everything....try doing that.....

 

did u replace your tranny? if its still the stock cx tranny thats why you are not getting any pull... they have the longest gears of the d series... i can beat a z6 with cx tranny and i have a d15 non-vtec with dx tranny... if he had my tranny if would be an easy win for him... but if ur gonna swap your tranny then get a ex/si tranny... as for ur cel i dont know why that is