Anybody sporting the ScanGuage II?

[wing_gundam]

Well now I'm at

Scangauge 2, car 0

I hooked it up to my gf's Mazda 3 to find a code. She too has a EGR valve issue. What's the deal man? haha.

Finding the port in the Maz3 was funny. I spent 10 min looking under the steering wheel and even the passenger side and under the hood.

Finally it turns out the port is sitting in the roof of one of those cubbies to the left of the steering wheel.

[wing_gundam]

I'm also sitting at like 4.4% accuracy now... idk why it keeps going down?

[OrdnanceMarine]

Originally Posted by wing_gundam

I'm also sitting at like 4.4% accuracy now... idk why it keeps going down?

Usually it's fuel trim settings that are adjusting. Maybe you've got an injector or injectors that are not spraying as well as they used to? Might want to give a bottle of injector cleaner a try.

[wing_gundam]

Well the thing is, is that the numbers on the gauge are accurate, so its not a reading error - its just matching what the car is doing closer to what the gauge was set at.

[Logan176]

The maintenance light has been popping on in my wife's Civic. I was thinking about getting the ScanGuage II mainly for mpg data. I know that the SGII also reads engine codes. I know how to change the oil and check the fluids, but I don't know how to do anything mechanical.

If I bought a ScanGuage (or other code reader) how would deciphering the engine codes help me when I'd just have to take it to the shop anyway?

Thanks

[whtdvl]

saveyou $75+ for the shop to tell u what the SGII can..the way i see it...in clearing two codes the SGII would in a way have paid for itself

and when you take it to the shop you will have a better idea of what needs to be replaced instead of just taking their word for it when they tell you that it will cost $1,000 for nothing

[Logan176]

Originally Posted by whtdvl

saveyou $75+ for the shop to tell u what the SGII can.

So are you saying that if I had the SGII, I would read and write down the codes, then bring the codes to the shop? Do shops normally take your word for it or do they still check using their own scan tool anyway?

[whtdvl]

when my wife's car threw a code i wrote it down and looked it up on the internet...

my uncle owns a mechanic shop and i told him the code number and what i found on the internet and when he scanned it he confirmed exactly what i found on the internet...

if you have a shop that you trust then i'm sure they will...some places will cut you a break it you have the problem fixed after having it scanned...

if you scan it yourself and you look it up and see it's nothing major...like a bad o2 sensor(which won't kill the car, it just won't be perfect) then you can clear it if you want...or just leave it on...it gives me piece of mind knowing what is wrong...i'm not worried about clearing as much as knowing what it is

[wing_gundam]

you take the code and look it up on Troublcodes.net Trouble Codes OBD & OBD2 Trouble Codes and Technical info & Tool Store. By BAT Auto Technical

then you just book an appt with the dealer and say what's wrong

if its under warrenty then there's no issue really,

but if its out of warrenty than they'll just order the parts and do the replacement for you (yes you'd pay for that) but you'd save the $75-100 the dealer charges for reading the code with their scan tool.

[camaroto07si]

so if i get a CEL i can delete it with this thing right? say if i have a header w/ angled defouler and i get it then it will tell me? adn will i be able to delete it? and if it does delete it then will it never come up again or will i have to jsut keep deleting it?

[oj88]

Originally Posted by camaroto07si

so if i get a CEL i can delete it with this thing right? say if i have a header w/ angled defouler and i get it then it will tell me? adn will i be able to delete it? and if it does delete it then will it never come up again or will i have to jsut keep deleting it?

Yes, you should be able to delete it. However, if the ECM sensed that the problem persists, it will light up the CEL again.

[mattsbobo]

So, after owning the Scangauge II forever now, I just started using the MPG function. Can somebody explain how you get an acurate reading from it? You guys who have been using this gauge know what I'm talking about: it'll read 99999, then 26.7, then something else.

I literally JUST now started using this gauge (after setting the fillup), and filling up my tank. So will it give me an acurate reading at the tail end of my tank, or will it just keep flipping different numbers while I'm driving?

[mrbill]

If you are looking at the instantaneous MPG, then yes, it will read what you are doing right now. 99999 is what it shows with fuel cut.

If you want to look at average MPG, you need to go to "TRIP" and look at Tank, Current, or Today.

If you have the newer firmware, you can program the gages so that BOTH instantaneous and average are displayed at the same time.

-mr. bill

[OrdnanceMarine]

Originally Posted by mattsbobo

So, after owning the Scangauge II forever now, I just started using the MPG function. Can somebody explain how you get an acurate reading from it? You guys who have been using this gauge know what I'm talking about: it'll read 99999, then 26.7, then something else.

I literally JUST now started using this gauge (after setting the fillup), and filling up my tank. So will it give me an acurate reading at the tail end of my tank, or will it just keep flipping different numbers while I'm driving?

9999 is the reading you'll get when the fuel injectors cut off and this will generally happen when you take your foot off of the gas in gear over 1500 RPM or so. A cold engine will raise the RPM that this takes place. Honda has added this feature to help save some fuel. Do yourself a favor and put GPH up on your ScanGauge along with MPG and you'll see what's going on. At freeway speeds in 6th gear you will see numbers from the high teens all of the way up to the 100's in normal driving. Coast in neutral and you'll see 200-300 MPG.

The ScanGauge will be just as accurate (or inaccurate if you're calibration is off) when your tank is full as when its empty since it uses fuel injector pulse width to determine how much fuel is being burned which isn't affected at all by the amount of fuel in the tank.

[oj88]

Originally Posted by mattsbobo

So, after owning the Scangauge II forever now, I just started using the MPG function. Can somebody explain how you get an acurate reading from it? You guys who have been using this gauge know what I'm talking about: it'll read 99999, then 26.7, then something else.

I literally JUST now started using this gauge (after setting the fillup), and filling up my tank. So will it give me an acurate reading at the tail end of my tank, or will it just keep flipping different numbers while I'm driving?

What you're seeing right now is the realtime MPG. The values will definitely fly as it reflects instantaneous MPG value.

What you need is to use the XGauge function (assuming that your SGII firmware already has it) to call up the Current Trip's MPG as well as the Tank MPG and have it shown as a gauge. The Current Trip MPG will show you your average MPG for the current trip. While the Tank MPG will show you how much fuel economy you're getting from your current tank of gas.

Also, calibration is important. Make sure you do it right as some calculations like cost per mile, distance to empty and time to empty (among other things), are dependent on it.

[R18Nighthawk]

Is that data from the SGII off if you use aftermarket wheels?

[oj88]

Originally Posted by R18Nighthawk

Is that data from the SGII off if you use aftermarket wheels?

Depends on the circumference of the aftermarket wheels compared to the stock wheel's. If the aftermarket tires have a bigger circumference, speedo reading will be lower than your actual speed and vice versa.

[mikehmike]

thats pretty sweet, I may have to look into buying this =)

[R18Nighthawk]

Originally Posted by oj88

Depends on the circumference of the aftermarket wheels compared to the stock wheel's. If the aftermarket tires have a bigger circumference, speedo reading will be lower than your actual speed and vice versa.

Yeah I know it affects the speedo, but does that mean it affects the Scangauge II readings as well?

[anavrin351]

^^yes the scangauge gets what the ECU is telling it, and the ecu reads wrong. There may be a correction factor for MPH in the scangauge, but i'm not sure about that