Civic EX AND HX transmission question..
07-18-2004, 09:25 AM
#1
Junior Member
Thread Starter
Join Date: Jul 2004
Location: Dallas, Texas, USA
Posts: 33
Likes: 0
Received 0 Likes
on
0 Posts
Civic EX AND HX transmission question..
im wanting to make automatic HX into a EX 5 speed.. i have Ex tranny and ecu already... will there be any problem i will run into??
07-18-2004, 12:14 PM
#3
Honda-Tech Member
Join Date: Jul 2003
Location: Orlando, fl, US
Posts: 5,103
Likes: 0
Received 0 Likes
on
0 Posts
Re: Civic EX AND HX transmission question.. (Mistamike17)
No problems. As long as you put everything in properly. And make sure you are running the right ecu.
07-18-2004, 04:44 PM
#4
Junior Member
Thread Starter
Join Date: Jul 2004
Location: Dallas, Texas, USA
Posts: 33
Likes: 0
Received 0 Likes
on
0 Posts
Re: Civic EX AND HX transmission question.. (sohcvtec1995)
what is the right ecu?? the hx or ex ecu? the hx ecu is an automatic one. and the ex ecu is a 5 speed one... both obd 2.... if it's ok for me to swap an hx automatic tranny out for an EX 5 speed tranny and ecu... then why is there a problem with me swapping my HX automatic for an EX automatic? any idea anybody?
Thanks
Kenny
Thanks
Kenny
07-18-2004, 04:47 PM
#6
Honda-Tech Member
Join Date: Jun 2004
Location: Louisville, KY, USA
Posts: 1,153
Likes: 0
Received 0 Likes
on
0 Posts
Re: Civic EX AND HX transmission question.. (Kennysr6)
Don't quote me on this as I am not sure, but it seems to me like you would probably need a manual HX ECU to get things going properly. Anyone back me up or am I totally off the mark with that?
07-18-2004, 05:19 PM
#7
Electrician
Join Date: May 2004
Location: Astoria, Queens,, Zoo York City, U.S.A.
Posts: 4,709
Likes: 0
Received 0 Likes
on
0 Posts
I'm not sure if you can use the EX ECU. Isn't the EX ECU programmed for VTEC and the HX is not? IMO, you need the Manual HX ECU. As long as you have all hardware, should be plug and play.
Trending Topics
07-18-2004, 06:55 PM
#9
Honda-Tech Member
Join Date: Jun 2004
Location: Louisville, KY, USA
Posts: 1,153
Likes: 0
Received 0 Likes
on
0 Posts
Re: (Ignitecivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ignitecivic »</TD></TR><TR><TD CLASS="quote">like they said, u will need the HX ecu, if ur gonna use the Ex, u will have check engine light and its annoying.</TD></TR></TABLE>
Not only that, but the y8 (EX) ECU is programmed just like Dimi said for VTEC, whereas a y5 (HX) runs VTEC-E. If you run a p2p (EX) ECU in place of a p2n (HX), you'll be throwing a lot more than codes... It will cause the VTEC-E to kick in around 5K and from around 3k (where VTEC-E SHOULD kick in) to the time when the VTEC-E kicks actually in, it will only be operating on 8 exhaust valves and will be VERY boggy. I really think you need the HX manny ECU (p2n is the code, I think).
Not only that, but the y8 (EX) ECU is programmed just like Dimi said for VTEC, whereas a y5 (HX) runs VTEC-E. If you run a p2p (EX) ECU in place of a p2n (HX), you'll be throwing a lot more than codes... It will cause the VTEC-E to kick in around 5K and from around 3k (where VTEC-E SHOULD kick in) to the time when the VTEC-E kicks actually in, it will only be operating on 8 exhaust valves and will be VERY boggy. I really think you need the HX manny ECU (p2n is the code, I think).
07-18-2004, 07:19 PM
#10
the 5 spd hx ecu will not work too well on the auto hx engine.
the 5spd has the wideband (5 wire) o2 sensor and a different egr valve and control system than the automatic hx engine.
the 5spd has the wideband (5 wire) o2 sensor and a different egr valve and control system than the automatic hx engine.
07-18-2004, 07:41 PM
#12
i did a swap a while back on a 5spd hx, it had the 5 wire o2 sensor, and an egr with lift control and lift sensor all in one unit, about 2 weeks ago i had an auto hx come in it had a 4 wire o2 sensor, and had an egr system like a civic vx or an accord, or even a crx hf. so it MAY work but it would take some interesting wiring to make it all happen.
07-18-2004, 07:44 PM
#13
Honda-Tech Member
Join Date: Jun 2004
Location: Louisville, KY, USA
Posts: 1,153
Likes: 0
Received 0 Likes
on
0 Posts
Re: (v4lu3s)
Hmmm... I really wonder what ECU he could use... I wonder if it would be safe to go with say a manny VX ECU and do the OBD1 swap? Don't VX's have 4 wire O2's?
07-18-2004, 09:10 PM
#14
Honda-Tech Member
Join Date: Aug 2003
Location: San Marcos, TX
Posts: 3,116
Likes: 0
Received 0 Likes
on
0 Posts
Re: (Mistamike17)
VX is 5 wire too I beleive
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mistamike17 »</TD></TR><TR><TD CLASS="quote">Hmmm... I really wonder what ECU he could use... I wonder if it would be safe to go with say a manny VX ECU and do the OBD1 swap? Don't VX's have 4 wire O2's?</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mistamike17 »</TD></TR><TR><TD CLASS="quote">Hmmm... I really wonder what ECU he could use... I wonder if it would be safe to go with say a manny VX ECU and do the OBD1 swap? Don't VX's have 4 wire O2's?</TD></TR></TABLE>
07-19-2004, 05:42 AM
#16
i would either do an EX head swap with it, or get teh 5 wire o2 sensor, the 5spd egr valve, and the 5spd harness.
the ex head swap seems better to me.
though it makes me wonder if a just an ex cam will work....
the ex head swap seems better to me.
though it makes me wonder if a just an ex cam will work....
07-19-2004, 06:18 AM
#17
Honda-Tech Member
iTrader: (11)
Join Date: Dec 2003
Location: Midwest USA
Posts: 6,671
Likes: 0
Received 0 Likes
on
0 Posts
Re: (v4lu3s)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by v4lu3s »</TD></TR><TR><TD CLASS="quote">i would either do an EX head swap with it, or get teh 5 wire o2 sensor, the 5spd egr valve, and the 5spd harness.
the ex head swap seems better to me.
though it makes me wonder if a just an ex cam will work....</TD></TR></TABLE>
If you swap the ex head and run the ex ecu, then everything would work correctly assuming everything was installed properly?
the ex head swap seems better to me.
though it makes me wonder if a just an ex cam will work....</TD></TR></TABLE>
If you swap the ex head and run the ex ecu, then everything would work correctly assuming everything was installed properly?
07-19-2004, 06:30 AM
#19
Electrician
Join Date: May 2004
Location: Astoria, Queens,, Zoo York City, U.S.A.
Posts: 4,709
Likes: 0
Received 0 Likes
on
0 Posts
That might take care of your VTEC engagement issues but you still have the O2 and EGR issues that need to be looked over. You'll probably need to rewire those, THEN call it a day. You don't want to overlook O2s either. With those not working properly, your car will run horrible.
07-19-2004, 09:01 AM
#20
Junior Member
Thread Starter
Join Date: Jul 2004
Location: Dallas, Texas, USA
Posts: 33
Likes: 0
Received 0 Likes
on
0 Posts
Re: (Dimi)
thank you guy's for all your info's... i think im just gonna find me a 5 speed HX ecu.. and rewire the o2 sensor... think im gonna be ok... by the way... which one put's more power, EX or HX motor...and are u guy's sure i can use the HX 5speed ecu... and rewire the o2 sensor and im done?....
Thanks
Kenny
Thanks
Kenny
07-19-2004, 09:04 AM
#21
Honda-Tech Member
Re: (Kennysr6)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kennysr6 »</TD></TR><TR><TD CLASS="quote">thank you guy's for all your info's... i think im just gonna find me a 5 speed HX ecu.. and rewire the o2 sensor... think im gonna be ok... by the way... which one put's more power, EX or HX motor...and are u guy's sure i can use the HX 5speed ecu... and rewire the o2 sensor and im done?....
Thanks
Kenny</TD></TR></TABLE>
The EX will put down more power. It's more performance orientated.
Modified by Spade at 8:32 AM 7/20/2004
Thanks
Kenny</TD></TR></TABLE>
The EX will put down more power. It's more performance orientated.
Modified by Spade at 8:32 AM 7/20/2004
07-19-2004, 12:49 PM
#23
Junior Member
Thread Starter
Join Date: Jul 2004
Location: Dallas, Texas, USA
Posts: 33
Likes: 0
Received 0 Likes
on
0 Posts
Re: (v4lu3s)
what will i have to do?? daymm honda's!!! why so differcult.... daymmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm mmmmmmmmmmm
07-19-2004, 01:54 PM
#24
Honda-Tech Member
Join Date: Aug 2003
Location: San Marcos, TX
Posts: 3,116
Likes: 0
Received 0 Likes
on
0 Posts
Re: (v4lu3s)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by v4lu3s »</TD></TR><TR><TD CLASS="quote">an HX 5spd ecu is setup to run a 5 wire o2 sensor...which does not exist on an auto HX
</TD></TR></TABLE>
That bewilders me. Why would a A/T HX have a 4wire and a M/T hve a 5wire when they are the same damn engine
</TD></TR></TABLE>
That bewilders me. Why would a A/T HX have a 4wire and a M/T hve a 5wire when they are the same damn engine
07-19-2004, 04:35 PM
#25
Honda-Tech Member
Re: (specv5150)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by specv5150 »</TD></TR><TR><TD CLASS="quote">
That bewilders me. Why would a A/T HX have a 4wire and a M/T hve a 5wire when they are the same damn engine</TD></TR></TABLE>
I was incorrect in my earlier statment and assume it has something to do with the fact that the AT is a CVT.
Modified by Spade at 8:33 AM 7/20/2004
That bewilders me. Why would a A/T HX have a 4wire and a M/T hve a 5wire when they are the same damn engine</TD></TR></TABLE>
I was incorrect in my earlier statment and assume it has something to do with the fact that the AT is a CVT.
Modified by Spade at 8:33 AM 7/20/2004