Honda Civic (2001 - 2005) Coupe / Sedan / Hybrid (Includes Acura EL)

04 civic dx coupe swap

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Old Nov 1, 2015 | 09:40 AM
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Default 04 civic dx coupe swap

Whats up guys i have a automatic 04 honda civic dx coupe engine is going bad and theres no vtec i was wondering what other automatic engine can i throw in there with vtec
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Old Nov 1, 2015 | 10:02 AM
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Default Re: 04 civic dx coupe swap

Just the D17A2, really. You're not going to be gaining much aside from a slight fuel mileage improvement.
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Old Nov 2, 2015 | 06:42 AM
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Default D17a swap

So i have a 03 honda civic dx coupe im looking to get the jdm d17a engine and tranny im not going for any gains or anything my a1 is going so i want to swap it for a jdm d17a i was told i can use my engine harness from the dx but how would i wire vtec if the a1 is non vtec and would there be any other problems i woll run into with this swap
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Old Nov 23, 2015 | 04:43 AM
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Default Engine harness question

Ok so i have a 04 honda civic im swapping a d17a jdm into it and im getting a d17a2 harness and ecu but my question is what is the difference from the 2 door 03 honda civic ex harness which is part number 32110-plr-a51 and then the 2 door honda civic ex 04 which the harness for that is part number 32110-plr-a52 someone tell me the differnce pls
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Old Nov 23, 2015 | 06:39 PM
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Default d17a1 to jdm d17a

Ok so ive read on this plenty but cant sewm to find a straight answer and come on ht community we are here to help each other right ? So i have a 04 honda civic vp automatic i bought a d17a2 harness and ecu cos i heard there wont be to much problems when putting the jdm d17a in im getting engine and tranny for 700 bucks from my local import store i was wondering if im gonna run into anyother problem besides the reflash i have to do at the dealership to get it started cos of the immoblizer i read that since i have the a2 harness and ecu everything else should should just be a piece of cake someone pls let me know
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Old Nov 25, 2015 | 08:38 AM
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Default D17a ecu

So o have a 04 honda civic vp i have a d17a engine with d17a2 harness from 04 honda covic ex which a2 ecu can i get to work on here cos i know theres different ones i need a part number pls
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Old Dec 12, 2015 | 07:24 AM
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Default O2 sensor prob

I have a 04 civic dx vp it had a d17a1 in it blew a hole in the block so i bought a d17a no ht i did not do it for any gains so dont tell me im not gonna earn any gains cos that is not my intention i swapped it in switched exhaust manifold from the a1 to the d17a i have a d17a2 harness and ecu but only one o2 sensor plugs in why is that ?
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Old Dec 27, 2015 | 07:43 AM
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Default help a girl out

hi ht im new to the car scene i have a 04 honda civic coupe dx vp my d17a1 blew so i bought a d17a low mileage from a import shop motor and tranny for 700 bucks i bought a 04 honda civic ex at harness and ecu (which is d17a2 ecu and harness) plugged harness to engine and dropped it in i swapped my header from the a1 which has the cat built in on to the d17a so everything seemed to plug up besides the primary o2 sensor why is that there seems to be no where i can plug it into do i have to extend it to somewhere or what help me im stuck and are they anymore problems im gonna run into besides imm,obilizer issue which im gonna get programmed oat honda
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Old Dec 27, 2015 | 08:52 AM
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Default Re: 04 civic dx coupe swap

How many times do you have to make a new thread on the same topic? You're up to 7.
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Old Dec 27, 2015 | 09:27 AM
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Default Re: 04 civic dx coupe swap

Originally Posted by toyomatt84
How many times do you have to make a new thread on the same topic? You're up to 7.
instead of looking up my post douche bag how about a answer dont you think when i get a answer ill stop posting ?
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Old Dec 27, 2015 | 11:34 AM
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Default Re: 04 civic dx coupe swap

Originally Posted by 710dabber
when i get a answer ill stop posting ?
You promise?

Anyways, since I haven't owned a D17 for nearly a decade... I had to Google the majority of this information. It didn't take long, but since you're so desperate to be spoon-fed, here's the information you seek.

1. The D17A2 and D17A series VTEC engines have a Secondary O2 sensor much further downstream then the D17A1. This plug is actually mounted along the firewall, and the sensor is after the catalytic converter, which is located underneath the shifter box in the exhaust tunnel. The Primary O2 sensor port is still mounted on the topside of the transmission (see below):

D17A2:


D17A1:


2. Since you're probably fine with the Primary O2 sensor wiring, you're going to want to track down in your harness where the Secondary is wired to. You said you replaced your harness, but were vague as to which harness you replaced. If you only replaced your Engine harness, I don't believe you'll have any wiring for the Secondary O2 sensor and you'll either have to replace the Dash harness or wire it into the harness manually.
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Old Dec 27, 2015 | 12:25 PM
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Default Re: 04 civic dx coupe swap

Originally Posted by toyomatt84
You promise?

Anyways, since I haven't owned a D17 for nearly a decade... I had to Google the majority of this information. It didn't take long, but since you're so desperate to be spoon-fed, here's the information you seek.

1. The D17A2 and D17A series VTEC engines have a Secondary O2 sensor much further downstream then the D17A1. This plug is actually mounted along the firewall, and the sensor is after the catalytic converter, which is located underneath the shifter box in the exhaust tunnel. The Primary O2 sensor port is still mounted on the topside of the transmission (see below):

D17A2:


D17A1:


2. Since you're probably fine with the Primary O2 sensor wiring, you're going to want to track down in your harness where the Secondary is wired to. You said you replaced your harness, but were vague as to which harness you replaced. If you only replaced your Engine harness, I don't believe you'll have any wiring for the Secondary O2 sensor and you'll either have to replace the Dash harness or wire it into the harness manually.
I used a d17a2 harness and ecu but took the cat/manifold off of the d17a1 and put it on the d17a so i know the primary is on top which is plugged into the harness then there is the secondary which has no spot your saying im going to have to wire a o2 plug into the harness manually to the ecu ?
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Old Dec 27, 2015 | 06:16 PM
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Default Re: 04 civic dx coupe swap

Originally Posted by 710dabber
I used a d17a2 harness and ecu but took the cat/manifold off of the d17a1 and put it on the d17a
I realized what you had done throughout your previous posts. However, you still didn't clarify WHAT harness you got. A Dash harness is far different then an Engine harness.


Originally Posted by 710dabber
so i know the primary is on top which is plugged into the harness
In a previous post, you stated that you didn't get the primary O2 sensor wired yet.


Originally Posted by 710dabber
then there is the secondary which has no spot your saying im going to have to wire a o2 plug into the harness manually to the ecu ?
As I said earlier, if you didn't swap out the dash harness, I do not believe you have the wiring in place for the secondary O2 sensor.
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Old Dec 27, 2015 | 06:47 PM
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Default Re: 04 civic dx coupe swap

Originally Posted by toyomatt84
I realized what you had done throughout your previous posts. However, you still didn't clarify WHAT harness you got. A Dash harness is far different then an Engine harness



In a previous post, you stated that you didn't get the primary O2 sensor wired yet.




As I said earlier, if you didn't swap out the dash harness, I do not believe you have the wiring in place for the secondary O2 sensor.
Ok so can i buy any wore and have someone manually add it to my harness
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