[whitbomb07]

Hi all

Today I noticed a funny thing with my scan gauge, it only shows correct engine Load and instantaneous LHK when the Air con is ON!

Driving down the highway (straight and level, 100km/h) today I got the shock of my life when I looked at the scangauge and it had engine load at 99% and LHK at 10+LHK! As soon as I switched the air con on it returned to proper readings.

Has anybody else noticed this? Any explanation? I don't know about any other gauges, didn't have time to go through all of them, but speed and IAT didn't change.

Also what's the highest acceptable temp that IAT should be? On Friday it was over 30 degrees up here and after a few separate mountains climbs I saw it hit 75 almost instantaneously at the top of the hills and then drop off, had me rather worried that I was cooking the poor girl........

Your help and advice is appreciated.

Regards

Daniel

[Thumper]

IaC for me sits around 5-7 degrees above ambient when cruising on a warm day. It will go up to around 75-80 degrees C when climbing long steep hills (Like Brown mountain, or the Clyde mountain) This is on a 36 degree C day.

Have you adjusted your ScangaugeII yet? It is listed in the Scangague thread on how to adjust, and by what amount.

We all have found that during normal operation, it reads properly, but when you put the aircon on, just about every readout reads lower by a certain percentage than it should.

I'm just surprised the TPS function doesn't work. (Since the CRDi uses fly-by-wire throttle)

Hi all

Today I noticed a funny thing with my scan gauge, it only shows correct engine Load and instantaneous LHK when the Air con is ON!

Driving down the highway (straight and level, 100km/h) today I got the shock of my life when I looked at the scangauge and it had engine load at 99% and LHK at 10+LHK! As soon as I switched the air con on it returned to proper readings.

Has anybody else noticed this? Any explanation? I don't know about any other gauges, didn't have time to go through all of them, but speed and IAT didn't change.

Also what's the highest acceptable temp that IAT should be? On Friday it was over 30 degrees up here and after a few separate mountains climbs I saw it hit 75 almost instantaneously at the top of the hills and then drop off, had me rather worried that I was cooking the poor girl........

Your help and advice is appreciated.

Regards

Daniel

Daniel,

Thumper has summed it up for you quite well.  I have calibrated the Scangaue to give accurate fuel consumption readings when the aicon is off.  Look at the thread Thumper has mentioned.  The only guages that I have observed to be affected by the aicon are related to fuel consumption.  You may also notice a slight jump in MAP when the aircon comes on.  This we assume is a boost in turbo pressure to compensate for the extra load of the aircon compressor.

I guess you could calibrate the fuel consumption based on the aircon being on, but I can't be _ _ _ _ ed doing it and I just live with the issue as I am more interested in the other feature offered by the Scanguage II, such as speed, MAP, post intercooler temp, etc.  Interesting about the load guage though - I've never noticed that because I rarely use it.

Bob

[whitbomb07]

Thanks guy's

I have gone back and re read the dedicated scangauge pages.

The thing is load and fuel consumption seem correct currently with air con on. In the trip section the avg consumption agrees with the cars trip computer.

Seeing as 95% of the time aircon is on. (I normally have it on auto 22c and it's normally AC with one bar of fan. I can't seem to get comfortable with any other setting.

So I think I'll leave it the way it is. Just live with the quirk if he air con is ever off.

Regards

Daniel

[whitbomb07]

Ok now i'm really confused

Cruising at 40km/h in 3rd 1600rpm I had air con blasting (really hot in the car, outside its 30 alone).

Switched air con off and after a brief spike LOD and L100km went lower!

I haven't changed a thing on the SG but now it's doing the exact opposite of a few days ago? 

HELP!!!!!!!!

Anyway now I gotta worry about driving the poor car this arvo up a few hills (I'm scared to see what IAT will be......... )

Regards

Daniel

[Rubix]

One word: Reset button.

... ok 2 words. But try a reset and reprogram.

[whitbomb07]

Update on this issue.

It appeared that right after my 7500km service was done this issue was resolved and regardless of whether air con was on or off I was getting correct data.

Had my 15,000km service last week and now the problem is back again. LOD and inst LHK are now reading alot higher than they should with AC off, but accurate with AC on.

GRRRRRRRRRRRRRRRRRRRRRRRRRRRRR 

Spoke to the servicing department and they agreed with my suspicions that whilst they didn't edit the ECU software, the ECU flash that they do at each servicing could be what has caused this.

So now my SG is again partly U/S and I have another 14,500km to wait and see if the next flash fixes it again!

I've now done a reset (hoping to wipe everything and start with a clean slate) but it appears the SG still recognises the vehicle as the trip section still registers my current tank data. Only stuff like engine capacity, fuel type etc etc changed. The problem still occurs.

I really don't know what else to do.

Regards

Daniel

Daniel,

Mine has always been RS.  I have taken particular notice after services, but nothing has changed for me.  I am on good terms with the service manager and will mention what has happened with yours after services.  He asks me every time how the scanguage is going.  I've told him of the issue I have with fuel economy. 

I would say it is possible to set the % correction for a/c off and get correct figures, and to set the % correction for a/c on and get correct figures, but I have never tried it out.  I have mine set to be correct for a/c off.

It is a pain in the BS.  The scanguage works a treat in our petrol Getz.

Bob

[whitbomb07]

Bob

What is the % correction your talking about? Something in the setup section or the value when you fill up, or something else?

What ever the case, it would be a massive pain in the rear to have to constantly keep changing it whenever I turn the air con off/on.

Thanks for the help. Much appreciated.

Also I know the topic has been raised before, but I can't find it. When coasting down a hill the SG is reporting 0.0 inst LHK. Is this actually true? Is fuel flow completely shut off and simply the kinetic energy/momentum of the vehicle keeping the engine turning?

Regards

Daniel

Also I know the topic has been raised before, but I can't find it. When coasting down a hill the SG is reporting 0.0 inst LHK. Is this actually true? Is fuel flow completely shut off and simply the kinetic energy/momentum of the vehicle keeping the engine turning?

This was mentioned by Thumper (I think) somewhere.

And if you stay on the overrun and allow it to slow down until the revs reach 1000 RPM then the fuel will switch from none to whatever is required to hold 1000 RPM.  It's very interesting to gently apply the brake when it's doing this - particularly in a low gear. 

Bob

What is the % correction your talking about? Something in the setup section or the value when you fill up, or something else?

What ever the case, it would be a massive pain in the rear to have to constantly keep changing it whenever I turn the air con off/on.

Thanks for the help. Much appreciated.

Also I know the topic has been raised before, but I can't find it. When coasting down a hill the SG is reporting 0.0 inst LHK. Is this actually true? Is fuel flow completely shut off and simply the kinetic energy/momentum of the vehicle keeping the engine turning?

Regards

Daniel

Daniel,

The % correection is the % you get when you fill up and adjust (based on the fuel you have put in the tank).  From memory, mine is on -35% (it could be up or down on this but not by much).  This gives me accurate LHK with the a/c not running. 

Yes, it would  be a pain changing this %, particularly as it would reset the tank reading to full on the guage.  And what would you do when the climate control cuts the a/c in and out.  I just hope one day that Hyundai does an ECU flash which fixes the issue.  Obviously there trip computer works differently to the Scanguage.

It is my opinion that the fuel supply is shut off when coasting.  This is the same in the Getz we own.  Electronic fuel injected engines these days have it all over carby naturally aspired engines that continued to use fuel regardless of the whether you were coasting or not.

Bob