 » Site Navigation | | | | » Recent Threads | | | |  |  |  | |  10-15-2008, 06:36 PM | #16 | | Senior Member Join Date: Mar 2007 Location: Annapolis/College Park Posts: 337 |
Quote: Originally Posted by spidertri  MD has had 10% ethanol for a while now.
Quinn, my cat is pretty crappy yet I still manage ~33mpg (mostly highway), as you know, I'm waiting for it to implode one of these days. | Haha yeah Dave, you better be careful, it'll happen when you least want it to! Yeah I have no idea what the deal is. IMO 10% ethanol wouldn't lower mpgs by 10! (and you're right, we've had the lovely stuff for some time already) __________________ She's no longer mine, but I gotta keep the pic 
Current euro: Black MkIII VW Gti VR6 |  |  | | 10-15-2008, 06:50 PM | #17 | | Senior Member Join Date: Sep 2006 Location: Wisconsin Posts: 1,895 |
Copied this off a website:
Some of the symptoms of a bad O2 sensor are fluctuating fuel economy. One you get 30 MPG and then it drops drastically, later its not so bad and then goes down again. There can be other problems, but a roller coaster ride involving fuel economy can indicate a faulty O2 sensor. Poor drivability, jerky acceleration or loss of power can all be O2 sensor related. __________________ ...
ʎɐqǝ uo pɹɐoqʎǝʞ ɐ ʎnq ı ǝɯıʇ ʇsɐן ǝɥʇ sı sıɥʇ | | | | | 10-16-2008, 02:24 AM | #18 | | Senior Member Join Date: Apr 2008 Location: Austin Posts: 3,059 |
28-29 city? Holy crap how do you do it? I can barely get 20mpg with my airfilter recharged, MAF cleaned, and I'm now using a feather to step on my gas pedal instead of my lead foot. __________________ Come get a ti-shirt
Quote: | From the e30 M3, evolved the e36.
They were "Keepin it Real" when they introduced the 318ti ClubSport in '95 and the 318ti Sports from '96 to '99.
After that... well nothing else really matters. ~Jess | | | | | | 10-16-2008, 02:27 AM | #19 | | Senior Member Join Date: Sep 2007 Location: asdfasdf Posts: 10,002 |
might need a tune-up then, change plugs, wires, oil if it hasn't been done recently | | | | | 10-16-2008, 03:02 AM | #20 | | Senior Member Join Date: Apr 2007 Location: Elizabeth City, NC Posts: 3,877 |
Quote: Originally Posted by Maverix 28-29 city? Holy crap how do you do it? I can barely get 20mpg with my airfilter recharged, MAF cleaned, and I'm now using a feather to step on my gas pedal instead of my lead foot. | If you are truly driving the way you describe and getting that poor of mileage I would assume there is something wrong with the car. Go to Autozone or where ever and get it scanned for codes. __________________ ~Dave~
98 328ti Morea Grun slicktop
11 128i space gray slicktop
13 JGC WK2 Deep Cherry
Search | RealOEM | | | | | 10-16-2008, 06:41 AM | #21 | | Senior Member Join Date: Mar 2007 Location: Annapolis/College Park Posts: 337 |
Yeah dude, sounds like you're in the same boat as me. __________________ She's no longer mine, but I gotta keep the pic
Current euro: Black MkIII VW Gti VR6 | | | | | 10-16-2008, 03:02 PM | #22 | | Senior Member Join Date: Aug 2008 Location: Globally Posts: 1,162 |
Free scan codes as mentioned, Are you loosing coolant? aka is it disappearing? Maybe the HG is starting to weep, seems that M4X cars loose HG's often so might want to consider doing a coolant system check.
Coolant doesn't burn well...so mileage will decrease. Worth a shot to look. | | | | | 10-16-2008, 04:02 PM | #23 | | Senior Member Join Date: Sep 2004 Location: Manassas, VA Posts: 4,129 |
Keep leaning towards CAT & O2 sensors. I replaced my rear sensor, only to have it go bad shortly after, because the CAT was going bad. In other words, the CAT was the real problem, and it causes the rear sensor to go bad. Eventually, the CAT REALLY started going bad (falls apart inside), and I lost all power. When that happens, you better get a CAT immediately. Quote: Originally Posted by themightyquinn
The O2 sensors are OEM fitment...ordered from pelicanparts using the realoem diagrams/part numbers. I'm trying to get a hold of a scanner soon.
What do you guys think about a bad Cat? It seems a little down on power, and I'm not sure if the Cat was changed recently.
| __________________ 
1998 (July) 318ti, 5-spd
OEM Armrest Blaupunkt Heidelberg CD50 CD Player/Compact Drive MP3 Player Diamond Audio 5.25" rear speakers Navman ICN 530 GPS BMWALARM.COM (with comfort settings) after market alarm system Magnecor 8.5mm wires M-Z3 Shifter/Momo Knob Burlwood Dashboard Stromung Exhaust X-brace Racing Dynamics Front Strut Bar Carbonio C.A.I. 17" Rial Rims Vader Seats/Heated/Lumbar Support M-tech Steering Wheel/Front Sway Bar/Front & Rear Bumper Depos/w 6500K Angel Eyes/6000K HIDs Clear Corners M3 Mirrors UUC Light Weight Flywheel/M5 Clutch/M3 Clutch Slave E28 3.46 LSD/Mcoupe Cover/E30 Flanges & Halfshafts UUC S.S. Brake/Clutch Lines Hartge Roof Spoiler BavAuto Springs Bilstein Sport Struts/Shocks E46 M3 Rear Shock Mounts SPC Front Camber Kit Reiger Hatch Spoiler BavAuto Rear Camber Kit Dinan Stage II Software Turner Rear Sway Bar Reinforcements BMW E46 Auto dimming mirror with Clown Nose alarm Engine Compartment Light Heated Wiper Fluid Retrofit OEM Fire Extinguisher Da'lan Trailer Hitch Rear Sun Shade OEM Fog Light Retrofit H & R MZ3 Rear Sway Bar/ UUC Adjustable End Links Cruise Control Retrofit On Board Computer Retrofit M3 twistie style side skirts Carbon Fiber Hood | | | | | 10-17-2008, 03:11 AM | #24 | | Senior Member Join Date: Apr 2008 Location: Austin Posts: 3,059 |
Quote: Originally Posted by spidertri If you are truly driving the way you describe and getting that poor of mileage I would assume there is something wrong with the car. Go to Autozone or where ever and get it scanned for codes. | I'll get it checked out tomorrow. Keep in mind, I have a replaced engine. __________________ Come get a ti-shirt
Quote: | From the e30 M3, evolved the e36.
They were "Keepin it Real" when they introduced the 318ti ClubSport in '95 and the 318ti Sports from '96 to '99.
After that... well nothing else really matters. ~Jess | | | | | | |
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