i got a 97 dx ek hatch that i recently put a gsr swap and will like to know what vtec motor harness i could use. try using the old one from my car but the idle sensor has 3 wires and b series only two. WHAT HARNESS WILL FIT THAT IS VTEC PREWIRE FROM EX COUPE? AND WILL THERE BE MODIFICATIONS TO DO FOR IT TO WORK THANK YOU

 

5 speed '96 - '98 EX harness requires the least amount of modification, you will need to add the IAB wiring and extend a few wires to reach certain sensors.

 

i bought a 97 ex harness but one of the plug that goes to the ecu is bigger, all the plugs the same as my old harness except one. will it work if i buy a jumper harness for the ex harness

 

EX uses the same ECU plugs, i'm assuming you didn't actually end up with a '96 - '98 harness, post pics of the ECU plugs.

 

the new harness that i got wont fit on the single cam computer, but the automatic ex harness fits on it will post pictures later on

 

You should just look for a gsr harness it will be alot more easier

 

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dont think you can use gsr harness on 96+civic.

96-98 civic ex/dx/lx harnesses should be the same at the ecu plugs.
and i think you can just cut one wire off the 3 wire and run it like that.
might have to use the plug for the gsr one.and just splice wires.leave that one wire unhooked, if it dont plug in.

are you trying to use your original civic ecu?
was you car automatic before?

 

Theres your problem, if you use an automatic EX harness the only real advantage is that vtec is prewired, you still have to convert the harness for a 2 wire IACV. 5 speed EX harnesses are already setup for a 2 wire IACV.

 

my car is originally 5 speed and im going to use a chip ecu so dont need o2 sensor and others, i had bought a jumper harness that fitted on my original harness but the 97 civic ex harness that i just bought the plugs fit except one, the only harness that fits perfect on original sohc ecu and jumper harness its the automatic. if i get the right jumper harness for that ex harness will it work properly?

 

i got the same prob 96 civic b16 i need a obd2a harness 5 speed i found one but its auto will it work ???