F4i - Main Forum Main F4i discussion board

Poor MPG

  #1  
Old 04-18-2011, 09:50 PM
Junior Member
Thread Starter
Join Date: Mar 2011
Posts: 19
Default Poor MPG

Hey guys,
I have had to fill up my tank 3 times this season and am getting about 30mpg. I have also noticed that on the takeoff if I accelerate hard it will kind of hesitate a little before it really takes off. Also, after a 20 minute ride or so, when I come home my girlfriend and I notice that I smell like gas (not extremely strong, but its there).

I am thinking maybe new spark plugs and air filter will be the key? What do you guys think

01 F4i with 18,4XX miles on it.

Edit: I do not ride hard every time I hop on the bike. Sometimes I get on it but I never go past 10k shifts and normally I am riding around 5.5k
 

Last edited by schnezy; 04-18-2011 at 09:53 PM.
  #2  
Old 04-18-2011, 09:58 PM
Ironmang
Join Date: Jul 2005
Location: Bostic, NC
Posts: 1,811
Default

Usually 2 main culprits for poor MPG on an F4i:

-Power Commander... if you have one of course. Poor MPG is usually one of the first signs of a power commander that's about to kick the bucket

-Fuel pressure regulator.... they stick and make it run rich


But a good tune up with plugs, air filter, valve check, etc wouldn't hurt anything either if it hasn't been done yet. But if you don't have a PC, I'll bet on the fuel pressure regulator being the culprit. If you do have a PC.... unplug it entirely from the system and see if the MPG changes or stays the same
 
  #3  
Old 04-18-2011, 10:04 PM
Junior Member
Thread Starter
Join Date: Mar 2011
Posts: 19
Default

I do not have a PC, but the FPR seems like it may be the problem since I have low MPG and i smell like gas once I'm done riding.
 
  #4  
Old 04-19-2011, 01:31 AM
mchl_daly's Avatar
Member
Join Date: Mar 2011
Location: Albuquerque, NM
Posts: 47
Default

Huh...I didn't know the PC can go bad and do that. I'm glad I read this.
 
  #5  
Old 04-19-2011, 11:47 AM
cynicalrider's Avatar
Senior Member
Join Date: Jan 2010
Location: Nor*Jers
Posts: 217
Default

What is everyone supposed to be getting MPG wise? I think I was only getting around 32 myself.
 
  #6  
Old 04-19-2011, 12:21 PM
Ironmang
Join Date: Jul 2005
Location: Bostic, NC
Posts: 1,811
Default

I usually average 40-42..... have for the last 6.5 years. I've had lower when I was pushing it harder, and higher when I was going real easy (as high as 47, or maybe even 50 before I forget)
 
  #7  
Old 04-19-2011, 01:18 PM
cynicalrider's Avatar
Senior Member
Join Date: Jan 2010
Location: Nor*Jers
Posts: 217
Default

I think I just have a throttle control issue. I usually always start hard, even if it's just to get to the speed limit. Just gives me the little thrills I need.
 
  #8  
Old 04-19-2011, 08:07 PM
Senior Member
Join Date: May 2007
Location: Appleton, WI
Posts: 419
Default

I always get 35-40 no matter what.
 
  #9  
Old 04-24-2011, 02:58 PM
supersnake83's Avatar
Senior Member
Join Date: Oct 2008
Location:
Posts: 533
Default

I have a similar issue as the original post. Sometimes my bike hesitates when I take off or if I am riding and slow down (but not enough to go to the next lower gear) then pick up the acceleration and my bike will hesitate.

I too smell like gas/exhaust after I am finished riding.

My bike only has a slip on exhaust in terms of performance or aftermarket power/electrical related parts.

Any ideas?

Thanks.
 

Last edited by supersnake83; 04-25-2011 at 08:47 AM.
  #10  
Old 04-24-2011, 03:07 PM
Senior Member
Join Date: Apr 2011
Location: Atlanta, GA
Posts: 143
Default

is it weird that my bike will only take 2.5 gals at every fill up? i usually go about 100-115 miles before having to head to the gas station
 

Thread Tools
Search this Thread
Quick Reply: Poor MPG


Advertising
Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.