Hi everyone,

I've been searching google and this forum for an answer to my question, but I've decided that asking my specific question might get me an answer quicker than deciphering other peoples' answers on other similar questions.

So....

I have a '95 Civic EX with a stock configuration. My goal is to be able to connect a ScanGauge II (http://www.scangauge.com/) to my car. Would it be easier to add in all the necessary OBD II components to allow my D16Z6 to work with an OBD II ECU **OR** would it be better to swap in a D16Y5 and just have a whole OBD II setup in my car?

Thanks in advance and I'm sorry if this has already been asked before. Like I said before, I found similar questions, but nothing that felt like it answered my questions fully.

 

It makes no sense, it doesn't benefit you at all.

 

if you want that useless guage just to show you your mpg than why not just do it the accurate why and fill your gas tank...reset your tripmeter...drive...and drive some more, refill your gas tank, look how many gallons it took to fill, and devide the miles on your tripmeter to how many gallons it took to fill.

if you want it to show your rpms and speed...just go get a vafc...does more than that little gadgit you want. Converting your motor to obd2 will be no picnic. There is not one success story I have ever heard of. You have to try and trick the ecu into what senors are there or not.

dumb dumb dumb idea....but hey you asked right?

 

It connects to the car not the ecu. Will not work.

 

Well, the scangauge connects through the OBD II port, hence why I was asking about converting my car from OBD I to OBD II. I know it is a lot more than just changing a couple parts, so that's why I wanted to ask the people of this forum which of the two options I gave would be easier.

The truly easiest way would be for me to buy a 6th gen HX. That would get me better fuel efficiency AND the OBD II port I need to hook up a Scangauge.

To answer the "Why?" about having a scangauge, I'd like to have a secondary measurement method or device to back up my manual calculations. I already use fuel receipts and my tripmeter to calculate my fuel efficiency. Also, having an instantaneous reading of my mpgs would help me to ease off on the gas even more than I already do. I currently average 42.4 mpg over about 2,000 miles and I'm hoping to improve that.

 

If you are so worried about a gauge showing you what is going on, you should buy a wideband oxygen sensor & something like a RD1 module.

Look here: http://www.hrtuning.com/pages/category/rd1videos
For more information....

 

Seriously, you want a gauge to tell you when to stay off the gas.....

By the time you figure out the money spent and time wasted on this conversion. I would figure that any gains in MPG that you might see from doing this with a 16 year old engine would be a moot point.

IMO you'd be better off taking the "truly easiest way". No need to reinvent the wheel here! "Work smarter, not harder"

that is unless you are doing this as a hobby or a school project. Doing it just to gain 1-2 MPG is a waste IMO.

 

I know it seems silly, but it's more of a personal challenge to myself to see how high I can get the mpgs on this car. However, the primary objective is to save money. I knew my ideas were a bit of a stretch and I was kind of blindly hoping someone would be able to tell me, "Oh sure! All you need is this $50 part."

I got my 95 EX for $1500, so it was a pretty good deal. The HXs seem hard to find in decent condition and for a low price. Like I said, saving money is my main goal. So, spending $3500 to get a 6th gen HX that may get up into the 50's (250-300 gallons per year) might not be as good as $1500 on a 5th gen EX that I've gotten into the low 40's (~360 gallons per year) now. Buuuut that upgrade would save me a few hundred bucks a year in fuel, especially with fuel prices continuing to climb.

I know you guys are tuners, so this stuff probably doesn't interest you in the least bit. Thanks for the answers, though!

 

All you need is this to tell you how much gas you are using lol:

http://www.phearable.net/shoppingcar...844-p-219.html

 

is not going to be as easy as slaping a $50 dollar price for starters OBDII have more system than OBDI
you would need to drill and tap your exhaust to put a raer O2 sensor, modify your charcoal canister to put a vent and purge valve, set your evap system so the ecu can do the proper test, depending on the system youmight need do change your egr system depending what your ecu requires if you even have an egr system on your vehicle right now, all the wiring for the new systems and sensors, depending on the ecu you might need do install wheel speed sensor, change the tps and gas pedal if the ecu is looking for an electronic control throttle plate, tempeture/pressure sensors if the new ecu requires them.
even with a swap you need a way to wire all the new sensors, o2's and evap system

if you really want do get better gas millage try testing differents brands and grades of gasoline belive it or not they are not all the same and some additives or grade of gas works better on different vehicles

your looking at thousands of dollars in parts and labor to save hundreds I personally see the point

 

get it tuned for $500 and gain a few mpg.