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Old 09-24-2012, 11:06 PM   #21 (permalink)
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Black and Green - '98 Honda Civic DX Coupe
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Quote:
Originally Posted by darcane View Post
Do you know if this applies to the 7th Gen HX as well? I can feel my '01 HX stumble/surge as the rear O2 sensor drops to 0.000 and back, which I understand to be indicators of lean burn. The original owner of my car was in California, so I believe mine is a California car with Lean Burn. It even has a sticker on the window indicating ULEV - 50-state/CARB legal.
I don't know, but I believe the 2000 Insight had LB and was not only legal in Cali but was categorized as an ultra low emissions vehicle under state law. I would guess that Honda had figured out how to improve emissions enough to qualify all their lean burn engines in Cali and so, I guess, maybe that explains how the 7th gen Civic (2001-2005) was CARB qualified.

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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

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Old 09-27-2012, 01:38 PM   #22 (permalink)
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hX-TREME!!! - '97 Honda Civic HX
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Soo do you think you can send me a like to where you got your mpgino and where you got your calibration and instal info?
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Old 09-28-2012, 02:52 PM   #23 (permalink)
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I got the MPGuino from a user on this forum: JellyBeanDriver
let him know i referred you to him!

as far as the link for MPGuino calibration on a 2000 civic HX, here it is:
http://ecomodder.com/forum/showthrea...ures-8355.html


thinking more about what gauge i like better..... I basically use the UltraGauge for its digital tachometer function. by look at the digital tach, i can tell very accurately if i'm accelerating (slightly), or decelerating - and use that info to apply a hair more or less gas, depending on the road situation. the Ultra is also good to keep track of intake temp, and engine load. but the MPGuino is soooo useful for its fuel data that it gives.

example:
you are going up a hill. you want to be decelerating very slightly, so you watch the UltraGauge digital tach to make sure that is happening. as you crest the hill, you want to start to level out the tacho so you are not gaining or losing RPM. then on the way down the hill, you want to watch the MPGuino to make sure you are still getting good MPG when you *slightly* accelerate down the hill, once you have accelerated to your desired max speed, put car in neutral and coast down the rest of the hill (or EOC). and watch the MPGuino go to insane numbers for instant MPG, and your overall trip MPG will go up way fast as a result.
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2000 Honda Civic HX with mild aero mods


2006 Honda Insight
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Last edited by SpeedyCorky; 09-28-2012 at 08:56 PM..
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Old 09-28-2012, 11:01 PM   #24 (permalink)
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alright man, i ordered one up and told him you referred me, thanks again for answering all my idiotic questions!!!
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Old 09-29-2012, 12:06 AM   #25 (permalink)
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Quote:
Originally Posted by Jakins View Post
alright man, i ordered one up and told him you referred me, thanks again for answering all my idiotic questions!!!
he answered all of mine (JellyBeanDriver), so it all worked out in the end
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2000 Honda Civic HX with mild aero mods


2006 Honda Insight
MIMA, FAS, no passenger sideview mirror, race style drivers mirror, front and rear underbody aero, temporary front air dam
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Old 12-07-2012, 01:50 AM   #26 (permalink)
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Quote:
Originally Posted by Jakins View Post
Hey man, incase if you didnt know the 96-98 civics are obdII-a and the 99-00's are obdII-b. the plugs are very different on the ecu's. They make jumper harnesses for them but those are like 150 bucks at least I think..

Jakins,

I found a manual 96 HX Fed ECU on ebay for 30 bux (37820-P2N-A21). Thought I would try in my 00 hx Cali Ecu (37820-P2N-L32) . I was able to swap the 96 over to my 00 WITHOUT jumper harness. Will post up pictures soon
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Old 12-07-2012, 02:03 AM   #27 (permalink)
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Quote:
Originally Posted by im2s1ick4you View Post
Jakins,

I found a manual 96 HX Fed ECU on ebay for 30 bux (37820-P2N-A21). Thought I would try in my 00 hx Cali Ecu (37820-P2N-L32) . I was able to swap the 96 over to my 00 WITHOUT jumper harness. Will post up pictures soon
Sorry to double post. Here's the ECU comparison.
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Old 12-07-2012, 02:59 AM   #28 (permalink)
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Holly crap I feel like a total idiot for stearing you in the wrong direction. Check this out. Apparently 99-00 hx's are obd2a. Who would have thunk it? Idk. I just threw some of the other links on here for you as we'll. I don't want you car blowing up.

This is the thread about hx being obd2a What is the difference between OBD2A and OBD2B? - ClubCivic.com - Honda Civic Forum

http://ff-squad.com/tech/ecu/ecu.plugs.jpg

This is the obd2a wiring
http://www.ff-squad.com/technet/wiri...schematics.gif

Obd2b (very different excluding hx's apparently)
http://www.ff-squad.com/technet/wiring.obd2b.htm
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Old 03-27-2013, 04:13 AM   #29 (permalink)
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I just put in a 37820-p2n-A22 ecu from 97 hx m/t in my 96 hx. My hx is a california version
It just past smog a few weeks ago and I was surprized because I thought the nox from leanburn would show up too high but it was okay.California hx cars do have leanburn its just very very slight. My best trip avg was about 38mpg with the 37820-p2n-A21. So I was about to put in the new ecu when I realized the one in my car WAS a Federal ecu! How could I be getting such bad milage in a HX with fed ecu, and for that matter how did I pass California Smog Test? then it dawned on me that some one must have reprogrammed it, it drives fast and vtec is very easy to get into. I now have installed my new p2n a22 and its great! I took a 90 mile trip today and only used two gallons of gas= 45mpg. Cant wait to buy mpguino to fine tune my driving habits.
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Old 03-27-2013, 12:03 PM   #30 (permalink)
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^^^ good info

get a UltraGauge as well. the #2 o2 sensor reading will tell you when you are in lean burn. and the TPS will give you info too. below 20% it will pop into lean burn, above 20% it wont. once in lean burn, keep the TPS below 30% and it will stay in LB. getting into, and staying in LB is the key to MPG w/ the HX. the UltraGauge will help A LOT with this!

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2000 Honda Civic HX with mild aero mods


2006 Honda Insight
MIMA, FAS, no passenger sideview mirror, race style drivers mirror, front and rear underbody aero, temporary front air dam
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