Poor fuel economy 1.8T

[hooddub]

Re: Poor fuel economy 1.8T

My GTI had this same problem. That thing was an absolute pig on fuel. Part of ot was the humongous injectors that were on it but those got swapped out and still had poor fuel economy.

[MechEngg]

Re: Poor fuel economy 1.8T

Looks like I used recharge incorrectly. I have a dryflow filter.
Maf is brand new.
O2 sensors are coded out properly with Unitronic Stage 2
I used plug and play resistors from Urotuning for all deletes...could be possible I have a bad one....which sucks cause I just sold the 3 extra ones I had! haha

Is the engine running ok or does it seem to bog down at all? Like does it seem like it is getting too much fuel

Could be worth putting in a new primary O2 sensor too. They do wear out eventually and give poor economy.

Sean, the rear O2 sensor has no effect on how the engine runs, its merely there to ensure the cat is working properly

Right my bad. I agree a primary O2 could be giving incorrect readings and give poor economy

[jaysleeves]

Re: Poor fuel economy 1.8T

I assume since you are "recharging" your filter it is an oiled filter? I would recommend a dry filter or else that oil has a tendancy to coat the MAF sensor and give false readings. You could try giving it a clean in the MAF cleaning solution and see what happens.
Your fuel trim levels could be outta wack also and dumping in more fuel than necessary if your rear O2 is coded out and you haven't resistored the N80 properly and coded it out specifically. (your uni stg1+ won't have this unless specifically requested and paying for it usually)

In reference i have the Gonzo tune and got them tuned out accordingly and get ~600km/tank typically in the city and more on the highway

Looks like I used recharge incorrectly. I have a dryflow filter.
Maf is brand new.
O2 sensors are coded out properly with Unitronic Stage 2
I used plug and play resistors from Urotuning for all deletes...could be possible I have a bad one....which sucks cause I just sold the 3 extra ones I had! haha

[onceover]

Re: Poor fuel economy 1.8T

Could be worth putting in a new primary O2 sensor too. They do wear out eventually and give poor economy.

Sean, the rear O2 sensor has no effect on how the engine runs, its merely there to ensure the cat is working properly

[MechEngg]

Re: Poor fuel economy 1.8T

I assume since you are "recharging" your filter it is an oiled filter? I would recommend a dry filter or else that oil has a tendancy to coat the MAF sensor and give false readings. You could try giving it a clean in the MAF cleaning solution and see what happens.
Your fuel trim levels could be outta wack also and dumping in more fuel than necessary if your rear O2 is coded out and you haven't resistored the N80 properly and coded it out specifically. (your uni stg1+ won't have this unless specifically requested and paying for it usually)

In reference i have the Gonzo tune and got them tuned out accordingly and get ~600km/tank typically in the city and more on the highway

[jaysleeves]

Hey guys just a quick inquiry. I searched a bit about bad fuel economy and found some things I can check out. Basically since I did the whole SAI/N249/N80 and added the catch can and 2.0T coil packs I'm only achieving about 300km's per tank, I used to get about 425 or so even with the roof rack.

Gonna try a couple things:
clean and recharge air filter
replace fuel filter
remove "T" from line at FPR for boost gauge. When I put it in car was basically stock, now I have open ports on the intake mani so I'll try that.

Any other suggestions? I don't smell gas. Car seems to run pretty normal. Idles normal although every once and awhile at a light I'll feel a quick stutter...nothing serious.

Thanks!