too little gas mileage, help!

soflop · 03-12-2011, 09:55 AM

Quote:

Originally Posted by sneaks

Soflop, you mentioned a different octane in response to my post, but i really meant leaded gas. I once knew a pilot that put 100 low lead from his airstrip into his car. It's great for performance.... horrible for cats.
You are right about the sensors, they SHOULD throw codes.
If there is an emission history, i would ask a dealersip for some history on your car.., they might help you out without charging you... or call customer support, they can pull all that info as well.
You might also want to spend some money on a well tenured mechanic that can understand proper engine performance, fuel adaptation values, if the engine is switching out of the warm-up enrichment mode....... Maybe $250 for a couple hours at the dealership might help you here.

Sorry, I don't know why the hell I put octane... I didin't know they even made gasoline with lead. Is it avgas you speak of? If it is, I had NO idea that had lead lol
and I dont know if they ever poured this. If they did, they're fckn retards cause it was unnecessary.

The warm-up enrich mode; is that when the car starts up cold and sounds weird and then just sounds normal after a few seconds?

micah_675 · 03-14-2011, 04:00 AM

Enrich mode? Maybe you need to learn about how O2 sensors work man....

As I said before, check your plugs. Look up pictures of what a normally worn spark plug looks like. If you were running rich you would smell gas in your exhaust which you have stated you do not. The only other option would be injectors. (your maf could be going bad but you would more than likely idle terribly).

micah_675 · 03-14-2011, 08:11 AM

You need to take an oil sample and get it analyzed. It would be able to tell if your car has had Leaded fuel ran through it.

soflop · 03-15-2011, 06:00 PM

Quote:

Originally Posted by micah_675

Enrich mode? Maybe you need to learn about how O2 sensors work man....

As I said before, check your plugs. Look up pictures of what a normally worn spark plug looks like. If you were running rich you would smell gas in your exhaust which you have stated you do not. The only other option would be injectors. (your maf could be going bad but you would more than likely idle terribly).

I know exactly how o2 sensors work. And I also know how to bench test one, which not many people do. I wonder what gave you the idea that I didn't know? I also know what fouled plugs look like. Its not giving faulty MAF symptoms. And if the case is that the MAF was bad, I'll definitely get the MIL due to mixture issues. I still think it has to do with the trans. or an ECU issue

Kikken · 03-15-2011, 06:31 PM

Quote:

Originally Posted by soflop

And I also know how to bench test one, which not many people do. I wonder what gave you the idea that I didn't know?

You answered your own question in the previous sentence.

At one point, someone in this thread said "I think we're just being trolled." I'm starting to agree with that person.

Fraggy · 03-15-2011, 06:55 PM

Im only geting 19.x on the 128 loaner manual.

soflop · 03-15-2011, 10:03 PM

Quote:

Originally Posted by Kikken

You answered your own question in the previous sentence.

At one point, someone in this thread said "I think we're just being trolled." I'm starting to agree with that person.

troll...

soflop · 05-09-2011, 10:33 PM

so after all the shit talking and trolling thats been going on in this thread by assholes who dont know jack shit about cars, and after a couple of months, my fuel issue seems to be coming to a halt. last fuel up i got 17.5 mpg and the previous fuel up, I got almost 16mpg. and by the looks of it (according to trip odo and fuel gauge), this one should get me at least 18mpg. It seems to be a contaminated fuel system, cause its gradually getting better. The only fuel I pumped was 93 octane Cheveron; seems to be doing the trick.

BimmerRob · 05-10-2011, 06:00 PM

Quote:

Originally Posted by soflop

so after all the shit talking and trolling thats been going on in this thread by assholes who dont know jack shit about cars, and after a couple of months, my fuel issue seems to be coming to a halt. last fuel up i got 17.5 mpg and the previous fuel up, I got almost 16mpg. and by the looks of it (according to trip odo and fuel gauge), this one should get me at least 18mpg. It seems to be a contaminated fuel system, cause its gradually getting better. The only fuel I pumped was 93 octane Cheveron; seems to be doing the trick.

I think I need to get mine checked too. I'm getting a dismal 14mpg in city, but my car's only a year old. avg. 35.6mpg on highway at 65mph around 2,300 rpm. I'm not smashing it in the city either... 91 octane after a fresh fuel change.

soflop · 05-10-2011, 08:49 PM

Quote:

Originally Posted by e92hobear

I think I need to get mine checked too. I'm getting a dismal 14mpg in city, but my car's only a year old. avg. 35.6mpg on highway at 65mph around 2,300 rpm. I'm not smashing it in the city either... 91 octane after a fresh fuel change.

Did you buy this car used? If so, how long have you had it?

03-14-2011, 04:00 AM	#90
micah_675 Second Lieutenant 71 Rep 282 Posts Drives: 2024 M2 Join Date: Sep 2010 Location: Georgia iTrader: (0) Garage List 2024 M2 [0.00]	Enrich mode? Maybe you need to learn about how O2 sensors work man.... As I said before, check your plugs. Look up pictures of what a normally worn spark plug looks like. If you were running rich you would smell gas in your exhaust which you have stated you do not. The only other option would be injectors. (your maf could be going bad but you would more than likely idle terribly).
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03-14-2011, 08:11 AM	#91
micah_675 Second Lieutenant 71 Rep 282 Posts Drives: 2024 M2 Join Date: Sep 2010 Location: Georgia iTrader: (0) Garage List 2024 M2 [0.00]	You need to take an oil sample and get it analyzed. It would be able to tell if your car has had Leaded fuel ran through it.
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03-15-2011, 06:55 PM	#94
Fraggy Brigadier General 193 Rep 3,469 Posts Drives: 2016 M3 Join Date: Jun 2005 Location: San Diego iTrader: (11)	Im only geting 19.x on the 128 loaner manual. __________________ 2016 Alpine White M3 (gone) 2019 Alfa Romeo Guilia (Totaled) 2020 Car-less 😁 (no more) 2020 M340
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05-09-2011, 10:33 PM	#96
soflop 3o5 24 Rep 150 Posts Drives: '07 328xi Join Date: Jan 2011 Location: Miami iTrader: (3) Garage List 2007 328xi [0.00]	so after all the shit talking and trolling thats been going on in this thread by assholes who dont know jack shit about cars, and after a couple of months, my fuel issue seems to be coming to a halt. last fuel up i got 17.5 mpg and the previous fuel up, I got almost 16mpg. and by the looks of it (according to trip odo and fuel gauge), this one should get me at least 18mpg. It seems to be a contaminated fuel system, cause its gradually getting better. The only fuel I pumped was 93 octane Cheveron; seems to be doing the trick. __________________ Grey BMW car // nice red interior // little screen with map that gives me directions // 2 doors // 6 cylinders // wheels with spokes // transmission that shifts itself // NOT RWD // gray springs that kinda lower the car, not the original black ones // cool sunroof // black roof with racks to put bicycles and maybe coffins // darker than factory windows // black kidneys // cool blue round lights in the front
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