What Could Cause This Problem

RuBiX Q · January 7th, 2012, 10:52 PM

I have a 01 GT auto and I get about 195 miles out of a full tank. Engine is completely stock with a drop in K&N filter. Car runs smooth, no check engine light, no leaks, no smells or anything. I only drive from work and home and I rarely, if ever, step on it. Mostly highway miles as well. That's not normal gas mileage at all especially the way I drive. Anyone have any ideas or suggestions to help me fix this?

stal94gt · January 7th, 2012, 10:55 PM

be honest, you probably give it more go than you think. if not i would start simple and do a tune up. run some sea foam threw your motor.

RuBiX Q · January 7th, 2012, 11:05 PM

Originally Posted by stal94gt

be honest, you probably give it more go than you think. if not i would start simple and do a tune up. run some sea foam threw your motor.

Did all of that still no change. For the last two fill ups I didn't step on it at all because I was testing to see if it was because I was stepping on it, and no change in MPG. Maybe bad o2's? but would bad o2's cause a big decrease in MPG? I'm averaging like 11 MPG city-highway.

stal94gt · January 7th, 2012, 11:16 PM

o2 sensors can cause bad milage. when you installed your k&n filter did you happen to drive it for 200 miles then clean the maf? most filters are over oiled and dirty up the maf.

RuBiX Q · January 7th, 2012, 11:50 PM

Originally Posted by stal94gt

o2 sensors can cause bad milage. when you installed your k&n filter did you happen to drive it for 200 miles then clean the maf? most filters are over oiled and dirty up the maf.

No I didn't do that. I'll try that.

00MustangGtPremium · January 8th, 2012, 12:19 AM

bad coils. I get the same milage no matter what and half my coils are bad

1996 GT · January 8th, 2012, 12:43 AM

Try some injector cleaner, new plugs and wires, constant oil changes, maf cleaner as mentioned above and a new pcv valve. The o2's will pop a code.

January 7th, 2012, 10:52 PM	#1
RuBiX Q Regular 2001 Mustang GT Join Date: Mar 2011 Location: New York Posts: 137 iTrader: 0 reviews	What Could Cause This Problem I have a 01 GT auto and I get about 195 miles out of a full tank. Engine is completely stock with a drop in K&N filter. Car runs smooth, no check engine light, no leaks, no smells or anything. I only drive from work and home and I rarely, if ever, step on it. Mostly highway miles as well. That's not normal gas mileage at all especially the way I drive. Anyone have any ideas or suggestions to help me fix this?

January 7th, 2012, 10:55 PM	#2
stal94gt I Post Entirely Way Too Much 2003 mustang v6 ;) slow Join Date: May 2010 Location: eglin afb florida Posts: 10,197 iTrader: 2 reviews	be honest, you probably give it more go than you think. if not i would start simple and do a tune up. run some sea foam threw your motor. __________________ bone stock from the factory!

January 7th, 2012, 11:16 PM	#4
stal94gt I Post Entirely Way Too Much 2003 mustang v6 ;) slow Join Date: May 2010 Location: eglin afb florida Posts: 10,197 iTrader: 2 reviews	o2 sensors can cause bad milage. when you installed your k&n filter did you happen to drive it for 200 miles then clean the maf? most filters are over oiled and dirty up the maf. __________________ bone stock from the factory!

January 8th, 2012, 12:19 AM	#6
00MustangGtPremium Regular 2000 Mustang Gt no clue Join Date: Mar 2011 Location: Naples, Fl Posts: 349 Blog Entries: 3 iTrader: 0 reviews	bad coils. I get the same milage no matter what and half my coils are bad __________________ Just because your cars loud doesnt mean its fast

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January 8th, 2012, 12:43 AM	#7
1996 GT Traction...? 1996 GT/ 2008 GT Vert Join Date: Nov 2010 Location: Canada Posts: 2,207 iTrader: 0 reviews	Try some injector cleaner, new plugs and wires, constant oil changes, maf cleaner as mentioned above and a new pcv valve. The o2's will pop a code.

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