Civic EG

ok so i have a b16a in my 93 civic cx and mt v-tec wont kick in! it kist sputters as it tries to engage and disengage . the only CEL is code 23 for the knock sensor and i have the correct sensor in and my car seems to run fine also when i did the swap i bought a 95 civic ex wire harness so i dont have to worry about a wire loose,...right? alll help is greatly appreciated

well i think i may be thinking gsr but i think besides the knock sensor there is another thing not on a ex/si harness that you will need to pin into the ecu as well as i think you may need to move a couple of ecu wires around you may have knock sensor and a good one but just may not be in the right spot.....

also I had this very problem in my Cx even bought a si harness but this was for a 1.6l sohc d and still didnt work right but yea id first check your plug n make sure its on there good and besides that i would probaly just look up pin out diagrams n make sure your getting a connection form the inside of the car (ecu plug to the knock sensor wire. you may be shorting out somewhere....

knock sensor is a must for v-tec
ex harness wont have knock sensor

are you sure a ex harness doesnt have a knock sensor plug cause there is one hanging in the perfect sport that plugs into my knock sensor and the auction on ebay that i bought that harness said it was off a 95 civic ex with v-tec cause i didnt wire in v-tec.

93hatcheg wrote:are you sure a ex harness doesnt have a knock sensor plug cause there is one hanging in the perfect sport that plugs into my knock sensor and the auction on ebay that i bought that harness said it was off a 95 civic ex with v-tec cause i didnt wire in v-tec.

92 to 95 EX, SI civics are vtec but they are obd1 vtec harness which doesn't have knock sensor plug bcus obd1 engines don't need a knock sensor.

So you bought an ex harness which its not going to work.

Am guessing you're using a p28 ecu. So what you do is extend the knock sensor wire through the cars chassis or through that original harness loom all the way to the ecu. You are going to connect the extended knock sensor wire to the number 3 hole on the D plug the connects to the ecu.

ok cool thanks alot man ill definatly try that, just out of curiosity tho is there any plugs on the ex harness that a b16a doesnt have a sensor for?

93hatcheg wrote:ok cool thanks alot man ill definatly try that, just out of curiosity tho is there any plugs on the ex harness that a b16a doesnt have a sensor for?

Nah bro all plugs should plug in. You would just add wires for the vtec selenoid, oil pressure switch and knock sensor straight to the ecu and that's it.

Ok cool man thanks sooo much. I just have one more question tho. If I buy a obd1 gsr harness will I need to wire anything in? Oh and I'm using a virgin p30 ECu

93hatcheg wrote:Ok cool man thanks sooo much. I just have one more question tho. If I buy a obd1 gsr harness will I need to wire anything in? Oh and I'm using a virgin p30 ECu

no

93hatcheg wrote:Ok cool man thanks sooo much. I just have one more question tho. If I buy a obd1 gsr harness will I need to wire anything in? Oh and I'm using a virgin p30 ECu

No bro you don't need to. You better off with this set up. Its just plug and play. No need for wiring.

Ok cool so I'm going to order a obd 1 gsr harness then. That is what you ment about thgat setup being best right? Thanks for all the help man I appreciate it.

That harness its gonna cost you a pretty penny. I thought you already had the harness.
If you have bank I say buy the gsr harness but if you in a budget I say just wire it up.

But either way good luck.

Na I don't have bank I just came up on a deal for a gsr obd1 wire harness for 45 bucks and I suck at wiring so I don't wanna try to wire my own in.

45 bucks???!!
You lucky bastard...
That's coo, then you're set.

Haha yea I guess I came up pretty good but hey thanks so much for all the help