sumocivic

Ok I did a mini-swap in a 96 dx I used the y7 dizzy and harness. The head, intake manifold, and computer are from a 96 ex civic the car idols fine but when you drive it it will not rev past 4800 - 5000 rpms changed the iacv from the three wire to two and still no change please help first swap started with some simple before putting my other motor in (GSR head b20 block)

landon2992

is it reading any codes??

sumocivic

Just for the O2 sensors and the IAT sensor but nothing that would keep my car from going over 5000 rpm it will just keep v-tec from cracking ( I think) when I plug in my y7 ecu it goes over 5000 (run rough like a truck) I've tried two other ecu that I know work and the samething

apexi_rsx

what dizzy are u using? y7 i dont think is going to work you need a y8

sumocivic

A y7 dizzy. I thought the same thing but if you use the y7 harness you can't use the y8 dizzy and after doing some research the only thing the the housing and the plugs are the harness

apexi_rsx

a y8 dizzy plugs rite in just make sure it comes from a 96-98 civic

sumocivic

I got one from a 98 ex and it will not plug into my y7 harness

EJ6-2nr

this is a good one
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myflyintegra

had a friends car doing the same. but wouldnt go over 3000rpm, never could figure it out so he sold it, other dude rebuilt it and problem was TRASH in fuel rail. like dirt, maybe clean ur fuel system out.

apexi_rsx

strange... try taking the blue plastic inner out of your y7 harness plug with needle nose and try it. it might not be seated correctly and not allowing it to clip in.

sumocivic

I checked the intake manifold and it has a huge leek I'm going to replace the gasket tomorrow and see if that helps any when I change the gasket I will clean out the fuel rail and the injectors. I went to the honda dealership and priced a new never used y8 harness and guess how much $130 but a v-tec dizzy was like $389 wow......

EJ6-2nr

well at least its nothin major, and ya thats a good price on a new oem harness go figure lol

turbodelsolb16a2

i had a mini me swap to and it did the same thing but they had a p72 ecu from a 98 gsr???? idk i put the stock ecu the p2e and it would go to 7k i think but no vtec....

apexi_rsx

if your running a p2p ecu are you running a knock sensor? if not it could cause this as well.

turbodelsolb16a2

yea double check your codes..

speedooo

knock sensor

sumocivic

I thought the samething one wire was out the plug for the knock sensor but I replaced it and the code for it went away but still can't go past 4900 rpm just when I put the y7 computer in