99 Ex with 99 Si swap.
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Honda-Tech Member
Joined: Jun 2002
Posts: 3,651
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From: Honkville, PA, USA
99 Ex with 99 Si swap.
I just recently did a 99 Si swap into 99 Civic Ex. Used the stock ex harness and 99 si ecu.
Codes-
10- intake temp sensor
20- electric load detector
41- primary o2 sensor heater
65- secondary oxygen sensor heater
The speedometer goes nuts when driving (the needle bounces around), but...the car runs perfect. Does not skip a beat, vtec engages perfect, and the swap runs perfect throughout the redline. I reset the ecu and codes are still comin up. Any help is appreciated. I thought about getting a 99-00 stock Si harness, but don't want to spend the cash if I don't have to. Thanks!
Codes-
10- intake temp sensor
20- electric load detector
41- primary o2 sensor heater
65- secondary oxygen sensor heater
The speedometer goes nuts when driving (the needle bounces around), but...the car runs perfect. Does not skip a beat, vtec engages perfect, and the swap runs perfect throughout the redline. I reset the ecu and codes are still comin up. Any help is appreciated. I thought about getting a 99-00 stock Si harness, but don't want to spend the cash if I don't have to. Thanks!
MiG-21 superfan
Joined: Mar 2001
Posts: 8,628
Likes: 3
From: near the ocean, Moderator City, NJ
Re: 99 Ex with 99 Si swap. (its **** yoO)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by its **** yoO »</TD></TR><TR><TD CLASS="quote">I just recently did a 99 Si swap into 99 Civic Ex. Used the stock ex harness and 99 si ecu.
Codes-
10- intake temp sensor
20- electric load detector
41- primary o2 sensor heater
65- secondary oxygen sensor heater
The speedometer goes nuts when driving (the needle bounces around), but...the car runs perfect. Does not skip a beat, vtec engages perfect, and the swap runs perfect throughout the redline. I reset the ecu and codes are still comin up. Any help is appreciated. I thought about getting a 99-00 stock Si harness, but don't want to spend the cash if I don't have to. Thanks! </TD></TR></TABLE>
sounds like you have some real wiring or ground gremlins...that should AFAIK work w/o any problems, like, plug and play for sure. they both you intake tube iat's, they both your the same o2 sensor plugs and wire order, the ELD code, i'm not sure about that one...i def think you have a ground or alternator issue considering you are having the ELD and speedo issues. go over the grounds several times to make sure they are all good.
Codes-
10- intake temp sensor
20- electric load detector
41- primary o2 sensor heater
65- secondary oxygen sensor heater
The speedometer goes nuts when driving (the needle bounces around), but...the car runs perfect. Does not skip a beat, vtec engages perfect, and the swap runs perfect throughout the redline. I reset the ecu and codes are still comin up. Any help is appreciated. I thought about getting a 99-00 stock Si harness, but don't want to spend the cash if I don't have to. Thanks!
</TD></TR></TABLE>sounds like you have some real wiring or ground gremlins...that should AFAIK work w/o any problems, like, plug and play for sure. they both you intake tube iat's, they both your the same o2 sensor plugs and wire order, the ELD code, i'm not sure about that one...i def think you have a ground or alternator issue considering you are having the ELD and speedo issues. go over the grounds several times to make sure they are all good.
Honda-Tech Member
Joined: May 2005
Posts: 703
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From: Columbus, ga
My 97 Cx had the ELD code going when i first swapped the motor. The lights would dim in and out on the dash and the speedo would bounce around like crazy. Did some research and found out that there is a fuse under the dash in the fuse panel that controls that. Replaced that blown fuse and it fixed that code.
Thread Starter
Honda-Tech Member
Joined: Jun 2002
Posts: 3,651
Likes: 0
From: Honkville, PA, USA
Re: 99 Ex with 99 Si swap. (builthatch)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by builthatch »</TD></TR><TR><TD CLASS="quote">
that should AFAIK work w/o any problems, like, plug and play for sure. they both you intake tube iat's, they both your the same o2 sensor plugs and wire order.</TD></TR></TABLE>
could u re-type that? Im lost.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EFvtec Yo! »</TD></TR><TR><TD CLASS="quote">My 97 Cx had the ELD code going when i first swapped the motor. The lights would dim in and out on the dash and the speedo would bounce around like crazy. Did some research and found out that there is a fuse under the dash in the fuse panel that controls that. Replaced that blown fuse and it fixed that code.</TD></TR></TABLE>
alternator fuse? I replaced that cuz it was blown...or are you talking about another fuse? Thanks for your help.
that should AFAIK work w/o any problems, like, plug and play for sure. they both you intake tube iat's, they both your the same o2 sensor plugs and wire order.</TD></TR></TABLE>
could u re-type that? Im lost.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EFvtec Yo! »</TD></TR><TR><TD CLASS="quote">My 97 Cx had the ELD code going when i first swapped the motor. The lights would dim in and out on the dash and the speedo would bounce around like crazy. Did some research and found out that there is a fuse under the dash in the fuse panel that controls that. Replaced that blown fuse and it fixed that code.</TD></TR></TABLE>
alternator fuse? I replaced that cuz it was blown...or are you talking about another fuse? Thanks for your help.
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Jun 27, 2006 03:26 PM
