2014 GU Fault Diagnosis

[Wildthing_507]

Hi Foggs,
I was hoping to improve my economy from 12.5 L/100 around town to 11 or so. 18-20 is over the top. I got 15 towing a camper trailer, 4 kids and my girlfriend in the car and a bit of gear in the roof rack from Darwin to El Questro and back. That was before the egr mod.

It's only been in for a few weeks and part of the first tank was without it but still got around 12 with the chip still in. Then the light came on in the middle of the next tank and when I disconnected the battery to clear the dash light I lost the trip meter. I have a full tank now and I'll let you know. I also took the chip out when the light came on. The chip gave it heaps of down low grunt and smoother driving but actually took the fuel economy up to 13+. I'll put it in after the light is cleared to try it again but to be honest, it seemed to make a big difference when I put it in before the egr plate but having taken it out, it doesn't seem much different.

Exhaust is definitely on the list but like you, money is stopping me at the moment. I should have done that before the chip but it would have driven me insane wondering about the chip.

[Wildthing_507]

Thanks Foggs for posting the info about the Torque pro and dongle. I'm still waiting for mine but at least it's looking hopeful of clearing the dash light and future codes.

Also, any feedback on anyone else' economy with or without mods would be great to gauge where I'm at.

[foggs]

..hoping to improve my economy from 12.5 L/100 around town to 11 or so.

The chip gave it heaps of down low grunt and smoother driving but actually took the fuel economy up to 13+....

12.5, wow I'd be stoked with that. Funny thing is I took it to an independent 4x4 mechanic and they couldn't find any faults with ecomony.. "how high is too high?" they said to me.. Also took it to Nissan and they checked everything out and still couldn't find any issues. Seriously not happy about that, but I'll persist.

I'm not that interested in performance as for me it seems to have heaps of power and pickup, just hope to get to the bottom of this fuel economy. I've been following a couple of other posts with interest this one and also another from another forum. Not sure if I'm allowed to post the link here from the other forum but in a nutshell, they found the type of tyre they're running (265/70/16) seems best, installing a snorkel, partially blocking the EGR, Installing a fan on intercooler for city driving, reducing radiant heat, running fuel from the majors rather than independants seems to have made an impact on fuel economy.

I just double checked my Android app on the car deck as I realised I had cleared the codes with another app called DashCommand. I find DashCommand has a nicer interface, however does not seem to have all the PID's that Torque has. DashCommand is also around $10 from Play Store. I also just loaded Torque again and re-scanned for the faults. It came up with fault code again, not sure whether it was stored from previous scan or not, but I was still able to clear it through Torque too.

[Wildthing_507]

Bummer about the fuel economy but I'm glad to hear the apps are working for you. Can't wait to get mine.

[thefattymatty]

i got my EGR block yesterday and it's going in tomorrow, when driving to canberra(from melbourne) my fuel economy was roughly 15l/100 sitting on 110(cruise control of course) up the hume but on the return drive i was getting 13l/100 sitting on 100 i have a roof top tent and it creates a lot of drag so the fuel economy is not that great, when i first brought the car it was about 16l/100 without the tent but it's run in now so economy is better.mat becsta adventures (618).JPG

[thefattymatty]

The EGR block went in this arvo(no hole) and I took it for a 20 kay drive no fault light as yet there was a tiny bit of oil in the intercooler inlet and outlet but nothing alarming I am doing a drive to the big dessert NP next weekend and doing border track so I will see if the economy improves on the drive there.

[foggs]

Since blocking the EGR and installing a snorkel, it seems my fuel economy has not improved at all for city driving. Prior to the mods, I used to get 500km out of the main tank straight after the fuel light came on (which is roughly 80L) equating to 16L/100km.

After the mods I'm almost half way through the main tank and have done almost 250km.. which is once again tracking for 500km/80L or 16L/100km..... arghhhhhh

[jack180]

Since blocking the EGR and installing a snorkel, it seems my fuel economy has not improved at all for city driving. Prior to the mods, I used to get 500km out of the main tank straight after the fuel light came on (which is roughly 80L) equating to 16L/100km.

After the mods I'm almost half way through the main tank and have done almost 250km.. which is once again tracking for 500km/80L or 16L/100km..... arghhhhhh

Interesting. I was getting about 16l/100 before i blocked the egr and fitted all the nads - no change. Then i fitted a new higher flow intercooler (just a cheap one from ebay) and a fan under the intercooler, and noticed a slight improvement.

But then i bought some MAF cleaner and gave my air flow sensor a really good clean - was always a bit worried to do this in case i stuffed it up.

Now im getting 13l/100. I do a mix of country and city stuff. If im doing just a long country run it drops to 11l/100

[Wildthing_507]

Finally got the obdII reader and app. Light cleared by itself prior to that but when it came on again I cleared it with the torque pro app. Fuel economy seemed great after first doing the egr block but now that I've done accurate consumption figures it still sits around 12.5l/100k's.

The power's great but I expected to see some improvement in economy with the engine running so much more cleanly.

I put the chip back in also and contrary to all the claims from the supplier, the economy is worse. It's a little more powerful all be it subtle. It's definitely nicer to drive with the chip but I'm disappointed that the economy didn't improve. I know that I'm pumping more diesel in to achieve the extra power but what they said made sense also, that now the extra power was there that I wouldn't have to change down gears as much and that would increase the economy. They were right about the extra power down low and staying in a higher gear for longer but I was already 'driving miss Daisy' and so haven't gained, but lost about 0.5-1l/100k's.

[threedogs]

FYI on the Hume going from Melb to the border Albury/wodonga its all up hill.
Going to the Murray my figures are always better coming home be it the Patrol
being a bit lighter