How 'bout a ScanGuage Thread?

[DFWDieselJet]

How about more x gauges, I need more, fuel temp, egr. Noone has them yet? thanks

Try this Xgauge, i THINK it shows EGR valve position. From what I've sen, it behaves like EGR (at least on my PD), but I haven't compared it to output from VAG-COM yet.

TXD: 686AF10111
RXF: 031004410511
RXD: 2808
MTH:006401000000
NAM: egr
Notes: %

Give it a try and let me know.

 

[TDIFred]

Is there a fast way to input fuel cost? Increments of 0.1 are not fast enough for me. Thanks!

 

[flyingnut40]

Hey! Does anyone have any idea how to recalibrate the MPG to Imperial Gallons for us old Cannuks that still think in terms of a 4.54L gallon, not a 3.91L US gallon?

 

[diesel_dog]

Try this Xgauge, i THINK it shows EGR valve position. From what I've sen, it behaves like EGR (at least on my PD), but I haven't compared it to output from VAG-COM yet.
TXD: 686AF10111
RXF: 031004410511
RXD: 2808
MTH:006401000000
NAM: egr
Notes: %
Give it a try and let me know.

I tried those numbers and got nothing, are they correct?

 

[NarfBLAST]

Try this Xgauge, i THINK it shows EGR valve position. From what I've sen, it behaves like EGR (at least on my PD), but I haven't compared it to output from VAG-COM yet.

TXD: 686AF10111
RXF: 031004410511
RXD: 2808
MTH:006401000000
NAM: egr
Notes: %

Give it a try and let me know.

I tried it and it shows me the exact same thing at Throttle Position Sensor? I wish I had more time to play with this stuff, I want to get EGR and MAF working... Will post as soon as I come up with anything.

 

[DFWDieselJet]

I'll check the gauge again...it might be a PD (BEW) only thing though.

 

[DFWDieselJet]

Yeah, I tried it again, and it sure looks like EGR valve position to me. Shows around 94% most of the time - always when accelerating. Drops sometimes under cruise, always drops significantly when decel. Has no direct correlation to TPS. I'm thinking it's a BEW-only reading...aren't they the only engine that had a butterfly valve in the intake for EGR?

 

[seftonm]

What led you to use 686AF10111 as TXD? That is the OBD PID for throttle position. 686AF1012C is the PID for commanded EGR.

http://en.wikipedia.org/wiki/OBD-II_PIDs

 

[DFWDieselJet]

What led you to use 686AF10111 as TXD? That is the OBD PID for throttle position. 686AF1012C is the PID for commanded EGR.

http://en.wikipedia.org/wiki/OBD-II_PIDs

2C is not supported on VWs...well, at least not on Diesel ones...never tried a gas VW: http://forums.tdiclub.com/showpost.php?p=2035899&postcount=3

I believe it's EGR valve position because on my BEW engine, 11 has no relationship to the actual throttle position. The one from the auto transmission (RXF 031A04410511) DOES match the throttle position, but the one from the engine controller (RXF 031004410511) behaves like EGR...which kinda makes sense since the EGR system on the BEW has a butterfly valve in the intake much like a "throttle" plate.

Here's an old thread about this: http://forums.tdiclub.com/showthread.php?t=193859&highlight=jumping+tps

 

[VW JUNKY]

I wish i had oil temp on my gauge. can that be programed in?
So far up to 400 miles since i reset everthing and it looks good.
Later
Erick

 

[McBrew]

I wish i had oil temp on my gauge. can that be programed in?

Nope. You'd need to add your own sensor and have a display for it. I don't see how this could easily be tapped into the SGII.

However, if you wanted to add an oil temp sensor, you could get a column gauge pod and put in 1 or 2 gauges -- oil temp, boost gauge, pyrometer, etc. http://www.kermatdi.com/servlet/-strse-133/A4-Dual-Column-Pod/Detail

 

[VW JUNKY]

I was looking at that gauge set from Kerma, it is on my wish list. What can't we get with Scangauge? Oil temp is one, did someone figure out boost for it?
thanks again,
Erick

Nope. You'd need to add your own sensor and have a display for it. I don't see how this could easily be tapped into the SGII.

However, if you wanted to add an oil temp sensor, you could get a column gauge pod and put in 1 or 2 gauges -- oil temp, boost gauge, pyrometer, etc. http://www.kermatdi.com/servlet/-strse-133/A4-Dual-Column-Pod/Detail

 

[DFWDieselJet]

What can't we get with Scangauge?
thanks again,
Erick

Here's what you CAN get:
http://forums.tdiclub.com/showpost.php?p=2035899&postcount=3

This is for the BEW engine; other engines may varsy slightly, but probabyl not much. If you have an manual transmission, you won't get the auto-trans values (obviously).

 

[mobe]

... did someone figure out boost for it?
thanks again,
Erick

Yes, there a link to Boost as a Gauge, see post #73 of this very thread.

 

[02 jetta]

I would like to get the gauge for automatic trans. temp guage but i don't understand what PID before the numbers means don't you need a number for TXD,RXF,RXD,and MTH to enter an x guage

 

[DFWDieselJet]

I would like to get the gauge for automatic trans. temp guage but i don't understand what PID before the numbers means don't you need a number for TXD,RXF,RXD,and MTH to enter an x guage

Here is the "official" doc that included the trans and coolant temp xgauges:
http://www.scangauge.com/support/pdfs/XGAUGE.pdf
...scroll down to the VW ISO section.

As for the PIDS, the PID is the last two digits of the TXD AND (in the case of the VW) the RXD.
The third and fouth digits of the RXD determine which controllers value will appear on the XGAUGE - 10 for engine, 1A for transmission.

 

[02 jetta]

I entered the numbers for trans. temp. off scangauge.com and the reading is the same as the coolant temp. reading on the scangauge that was already programed into it when it was new.

 

[MPLSTDI]

I agree I worked with Scanguage to get that one. But I don't think it works either. I tried a lot of different things. One thing I have been meaning to try is to put mine back to normal from fast and see if it works. When our scanguage requests engine temp it gives both first the engine temp and than the trans temp. This is all done without asking for the trans temp. VW is the only one that does it this way.

Scanguage states that if you have both on at the same time it should work, but it doesn't for me. (using the wtr xguage not the preprogramed one) Also a side note, the engine coolant is run to the DSG to heat it up when it's cold, and cool when it's hot. (I'm told)

 

[NarfBLAST]

Scangauge xGauge Coding for MAF

Some folks over at CLEANMPG.COM had a gread discussion on how the coding works...

http://www.cleanmpg.com/forums/showthread.php?t=8280&highlight=xgauge+coding&page=2

Here is how my MAF xgauge is set up...

TXD 686AF10110 ;reads OBDII MAF
RXF 044145100000 ;the number 4 in the 5th position gives you two decimal
RXD 2810 ;specifies scangauge to read 2bytes (0 to 655.35)
MTH 000100010000 ; math is simple, multiply by 1, divide by 1, no adder

Works on my car, only problem is that this is an OBDII reading with untils of grams/second but VAG-COM users are used to readings with untils of miligrams/stroke(edit: its stroke not rotation)

I need to find some time to connect VAG-COM and see what my MAF is actually reading these days but the requesting readings should be (according to my math, someone please correct me):

take mg/R multiply by rpm and divide by 30,000 to get g/s

here is the normal MAF test range (if you don't have the VAG-COM EGR adaptation, idle = ~230mg/R or 6.9g/s) c

idling with egr operating ~370mg/R @ 900rpm = ~11.1g/s
3rd gear accelerating wot >800mg/R @ 3000rpm = >80.0g/s

I know my MAF reads too high (possible bad maf or egr not working which is what I would like to troubleshoot if these kids and my wife ever give me an hour alone with my car!) but here are my numbers:

idle: 14.6g/s @ 900rpm (edit: turns out my EGR was not working)
max: 103g/s @ 3000rpm

Anyone else want to try it and post the numbers? Input appreciated.

 

[NarfBLAST]

mg/R where R is what now?

I found a working MAF! (VAG-COM says its readings are right near requested)

So now my MAF reads 340mg/R to 900mg/R according to VAG-COM.
and MAF xGauge reads 9.5g/s to 84g/s (aprox, one quick run in a 60 zone)

So perhaps i wasn't reading the "R" right, is that a stroke? If so then my equation needs to include two strokes per rotation right?

g/s= (mg/R * 2(rpm)) / 60000

so here are the new EXPECTED numbers:

idling with egr min 230mg/R @ 900rpm = 6.9g/s
idling with egr max 370mg/R @ 900rpm = 11.1g/s
3rd gear accelerating wot >800mg/R @ 3000rpm = >80.0g/s

 

[Blue_Hen_TDI]

Scangauge gets a mention on CNN: http://www.cnn.com/2008/LIVING/personal/03/24/gas.tips/index.html

I love advice #1: Find least expensive station.

Boy, is the American public really that dumb?


Please, don't answer!

 

[NarfBLAST]

Scangauge gets a mention on CNN: http://www.cnn.com/2008/LIVING/personal/03/24/gas.tips/index.html

I love advice #1: Find least expensive station.

Boy, is the American public really that dumb?


Please, don't answer!

That article was pretty lame... I disagree that a $150 is expensive! You can save that much in fuel pretty quickly.

 

[McBrew]

That article was pretty lame... I disagree that a $150 is expensive! You can save that much in fuel pretty quickly.

I'll take it a step further... a ScanGauge performs the same functions as a $50 code reader/clearer... so you can virtually take that out of the cost. The trip meter and gauge functions costs an additional $100. Even quicker payback!

 

[GreeningTX]

I've been using SGII for about 6 months or so. Over the first few tanks, progressive adjustment of gallons consumed at fill-up seemed to be pretty effective at zeroing in; and for a while I didn't pay much attention to the calibration. But then the "current" mpg figure began displaying much higher than normal (upper 50s and low 60s instead of ~50), and at the next fill-up I found that I had to adjust from around 27% (forgot to record the number) way down to 17.4%. And ever since, the fill-up adjustment has been jumping around wildly. The sequence over 5 fill-ups was: ~27%, 17.4%, 13.8%, 19.8%, 24.2% (can't recall if this is + or -, but it's always been the same). So now I'm back up to almost where I started.

Caveats: (1) I fill up fairly consistently at the same pump with the same technique and orientation, but I do not vent. (2) In making adjustments at fill-up, I've always gone all the way to the calculated figure, not half way as some folks have recommended. (3) I've never adjusted SG's mph reading using GIS.

Is it reasonable that the necessary adjustment varies so widely? Advice?

 

[VW JUNKY]

dude you might try venting to get more of a accurate setting. Fill up till you see it. Still only on my 2nd tank and it seems good so far. I run with the current mileage on the trip setting to see how high I can get it like going and coming to work. Kind of like a game. The tanks are lasting longer and I am getting more miles per gal. Last tank, 680 miles 14.9 gal. Not bad as mostly around town. I have lots of 45 MPH zones with no stop lights so the mileage is really good then. At highway speed the mileage goes down. I like my Yokohama tires but I might have to go with some harder higher mileage producing tires the next time.
later

 

[Jarhead96]

Great thread guys! Just thought I'd post a pic of how I mounted my Scanguage II in my Beetle. I made an extention over my XM Satellite Radio mount. Works pretty good so far.

 

[NarfBLAST]

I've been using SGII for about 6 months or so. Over the first few tanks, progressive adjustment of gallons consumed at fill-up seemed to be pretty effective at zeroing in; and for a while I didn't pay much attention to the calibration. But then the "current" mpg figure began displaying much higher than normal (upper 50s and low 60s instead of ~50), and at the next fill-up I found that I had to adjust from around 27% (forgot to record the number) way down to 17.4%. And ever since, the fill-up adjustment has been jumping around wildly. The sequence over 5 fill-ups was: ~27%, 17.4%, 13.8%, 19.8%, 24.2% (can't recall if this is + or -, but it's always been the same). So now I'm back up to almost where I started.
Is it reasonable that the necessary adjustment varies so widely? Advice?

You have collected enough data over 5 tanks and you average is 20%. Set her at 20% and leave it there. Mine is 20% too! Do you have any modifications?

I am pretty sure it is NOT a progressive adjustment. Its is a per tank adjustment... Therefor if you set it wrong for the previous tank then the next tank will seem to be off in the other direction (just like if you wrote down too little fuel this tank, you'd be like "wow, my consumption went down" but then the next tank you would be like "wow my consumption is way up!!"

I am confident that you will find that if you set it at 20% then then next few fillups will be pretty close.

 

[GreeningTX]

You may be right about 20% being the best overall adjustment, and I'll give it a try. But I guess I'm still a bit baffled/frustrated by the thing. Is SG, or is it not, getting a direct reading on the amount of fuel that's actually pumped? If, as some users have suggested, SG is doing some sort of calculation based on speed, that seems bizarrely indirect and a recipe for ongoing confusion and slippage. Does the onboard computer not provide a data feed on fuel pumped? That seems like an absolutely fundamental data point. The fact that the adjustment procedure is so loose-ended suggests that there is some sort of calculation going on, though.

I have a hard time believing that venting is the key. I'm getting at least a 12-13% spread, which over a tank is more than 1.5 gallons per fill-up. Surely I'm not getting anywhere close to that much variation from fill-up to fill-up when I use the same pump.

I suspect the cause is a combination of variables operating independently: SG doing some sort of calculation + inaccuracy in fill-up data + expansion/contraction of fuel volume + moon phase or who knows what.

2004; no mods.

 

[97TDIStu]

My '97 Passat Manual says my tank is 18.5 gallons and the reserve is 2.6 Gallons. Should I use 18 on the scanguage or 21?

 

[jayb79]

My '97 Passat Manual says my tank is 18.5 gallons and the reserve is 2.6 Gallons. Should I use 18 on the scanguage or 21?

It only effects your distance until empty.