MotoHouston.com MotoHouston.com
Register Members List Member Map Media Calendar Garage Forum Home Mark Forums Read

Go Back   MotoHouston.com > General Discussion > General Discussion (Moto Related)
Forgot info?

Welcome to MotoHouston.com! You are currently viewing our forums as a guest which gives you limited access to the community. By joining our free community you will have access to great discounts from our sponsors, the ability to post topics, communicate privately with other members, respond to polls, upload content, free email, classifieds, and access many other special features. Registration is fast, simple and absolutely free, join our community!

Register Today!

If you have any problems with the registration process or your account login, please contact us.


Like us on Facebook! Regular shirt GIVEAWAYS and more

Reply
Share This Thread: 
Subscribe to this Thread Thread Tools
Old 07-19-2013, 07:11 AM   #1
TheBeeDeeGee
Senior Member
 
TheBeeDeeGee's Avatar
 
Join Date: Jul 2012
Location: Katy
Feedback Rating: (0)
Posts: 529

Experience: 4 years
Trackdays: 3

Bike(s):
2005 CBR 600 F4i
2001 RC51 *sold :(
2002 VFR 800 *sold
2002 919 *sold
2006 599 * wrecked






Popping exhaust at idle and bad fuel mileage

I have an all stock 2002 6th gen VFR with 10k miles that just started making this *poomp *poomp deep pop sound randomly at idle. I haven't noticed any power drops, and the idle doesn't drop when it does this, but I'm not sure what it is. It also only seems to come from one muffler
At first I thought something was loose in the exhaust, but it's definitely not that.

any ideas?


I'm pretty sure it was after I came back from MSRH that it started, or at least I really started to notice it.

Also my MPG at my last fill up was 28! That ain't no good
TheBeeDeeGee is offline   Reply With Quote
Similar Topics
Thread Thread Starter Forum Replies Last Post
Exhaust popping/after fire Jcap Performance and Modifications 5 08-15-2015 09:10 AM
Small truck fuel mileage? CUSTOM ZX-14 Off Topic 38 05-13-2013 07:21 AM
bad fuel pump? gsxr Travis General Discussion (Moto Related) 11 02-08-2011 11:41 AM
Advertisement
Old 07-19-2013, 07:26 AM   #2
Bevo
Hook 'em!
 
Bevo's Avatar
 
Join Date: Mar 2009
Location: Houston-The South Loop
Feedback Rating: (0)
Posts: 24,296

Experience: 10+ years
Trackdays: 3

Bike(s):
'12 CBR1000RR Red/Black
'14 CB1000R Matte Gray
'10 CBR1000RR (destroyed)
'09 CBR1000RR C-ABS (sold)
'09 CBR600RR C-ABS (sold)

Member Garage





Quote:
Originally Posted by TheBeeDeeGee View Post
Also my MPG at my last fill up was 28! That ain't no good
Unless you constantly have WOT, something's up
__________________
Quote:
Originally Posted by bumblebee View Post
"I lack skillz"
Bevo is online now   Reply With Quote
Old 07-19-2013, 07:27 AM   #3
Chris_5.0
HalfFast
 
Chris_5.0's Avatar
 
Join Date: Jul 2011
Location: Katy
Feedback Rating: (2)
Posts: 12,385

Experience: 1-3 months

Bike(s):
1999 zx-9r
2005 gsxr 600
xr50r speed demond




Oil??
__________________
info@halffastgroup.com
Chris_5.0 is offline   Reply With Quote
Old 07-19-2013, 07:45 AM   #4
TheBeeDeeGee
Senior Member
 
TheBeeDeeGee's Avatar
 
Join Date: Jul 2012
Location: Katy
Feedback Rating: (0)
Posts: 529

Experience: 4 years
Trackdays: 3

Bike(s):
2005 CBR 600 F4i
2001 RC51 *sold :(
2002 VFR 800 *sold
2002 919 *sold
2006 599 * wrecked






I'm being told to check vacuum lines by others. If it was a cylinder not firing it would be really obvious I would think?

How would oil cause this?
TheBeeDeeGee is offline   Reply With Quote
Old 07-19-2013, 07:46 AM   #5
TheBeeDeeGee
Senior Member
 
TheBeeDeeGee's Avatar
 
Join Date: Jul 2012
Location: Katy
Feedback Rating: (0)
Posts: 529

Experience: 4 years
Trackdays: 3

Bike(s):
2005 CBR 600 F4i
2001 RC51 *sold :(
2002 VFR 800 *sold
2002 919 *sold
2006 599 * wrecked






Quote:
Originally Posted by Bevo View Post
Unless you constantly have WOT, something's up
and nah, this is in town commuting. I was getting about 35 mpg before the noise started. It isn't very loud, but still very noticeable.

Last edited by TheBeeDeeGee; 07-19-2013 at 07:50 AM.
TheBeeDeeGee is offline   Reply With Quote
Old 07-19-2013, 08:29 AM   #6
Truckin_Thumper
Senior Member
 
Truckin_Thumper's Avatar
 
Join Date: Oct 2012
Location: Dallas
Feedback Rating: (0)
Posts: 2,054

Experience: 1-3 months
Trackdays: 1

Bike(s):
El Tigre 1050
WR426 Blue Hooligan Motard ---once back together








First thing that comes to mind is plugs.

Air
Fire
Fuel

What about the air filter? Changed or cleaned lately?

You could try and run some of the Lucas fuel cleaner and see if that helps.
Truckin_Thumper is offline   Reply With Quote
Old 07-19-2013, 08:36 AM   #7
Flynjay
Senior Member
 
Flynjay's Avatar
 
Join Date: Nov 2011
Location: League City
Feedback Rating: (0)
Posts: 358

Experience: 5 years

Bike(s):
'07 Ninja 250 (sold)
'06 Ninja 650








Sticking valve? Popping is caused by unburnt fuel entering the exhaust and igniting.
Flynjay is offline   Reply With Quote
Old 07-19-2013, 09:07 AM   #8
Bevo
Hook 'em!
 
Bevo's Avatar
 
Join Date: Mar 2009
Location: Houston-The South Loop
Feedback Rating: (0)
Posts: 24,296

Experience: 10+ years
Trackdays: 3

Bike(s):
'12 CBR1000RR Red/Black
'14 CB1000R Matte Gray
'10 CBR1000RR (destroyed)
'09 CBR1000RR C-ABS (sold)
'09 CBR600RR C-ABS (sold)

Member Garage





Quote:
Originally Posted by Flynjay View Post
Sticking valve? Popping is caused by unburnt fuel entering the exhaust and igniting.
That makes sense, would hurt fuel economy as well
__________________
Quote:
Originally Posted by bumblebee View Post
"I lack skillz"
Bevo is online now   Reply With Quote
Old 07-19-2013, 09:11 AM   #9
Longdraw
Senior Member
 
Longdraw's Avatar
 
Join Date: May 2010
Location: Cypress, Tx
Feedback Rating: (3)
Posts: 3,972

Experience: 10+ years

Bike(s):
2007 KTM EXC 525
2007 VFR800, Interceptor
2003 Husky TE610/e-sold
2000 Husky TE410/e-sold
1998 Husky TE410-sold






Just get Lucar to put his lips on it. That might take care of the problem.

My 07 VFR does the same thing. But my gas mileage hasn't decreased. It doesn't do it all the time though. I don't worry about it too much but in your case you might want to look into it. Keep us posted!
__________________
Terlingua Dualsport Specialist

SDRC
Longdraw is offline   Reply With Quote
Old 07-19-2013, 09:21 AM   #10
cuong-nutz
Resident 250 guru
 
cuong-nutz's Avatar
 
Join Date: Mar 2009
Feedback Rating: (9)
Posts: 4,569

Experience: 1-3 months

Bike(s):
Ninjer 250









When was the last time you had your valves adjusted?
__________________
250cc's of pure Nutz
Ninjette Stunt Life Stunt Ride
cuong-nutz is offline   Reply With Quote
Old 07-19-2013, 09:23 AM   #11
Truckin_Thumper
Senior Member
 
Truckin_Thumper's Avatar
 
Join Date: Oct 2012
Location: Dallas
Feedback Rating: (0)
Posts: 2,054

Experience: 1-3 months
Trackdays: 1

Bike(s):
El Tigre 1050
WR426 Blue Hooligan Motard ---once back together








Quote:
Originally Posted by cuong-nutz View Post
When was the last time you had your valves adjusted?
10K on it, more than likely GTG....maybe
Truckin_Thumper is offline   Reply With Quote
Old 07-19-2013, 09:38 AM   #12
Longdraw
Senior Member
 
Longdraw's Avatar
 
Join Date: May 2010
Location: Cypress, Tx
Feedback Rating: (3)
Posts: 3,972

Experience: 10+ years

Bike(s):
2007 KTM EXC 525
2007 VFR800, Interceptor
2003 Husky TE610/e-sold
2000 Husky TE410/e-sold
1998 Husky TE410-sold






I have over 18K miles on my 07. Valves have not been adjusted. That is on my to do list in about 3K miles or so..
__________________
Terlingua Dualsport Specialist

SDRC
Longdraw is offline   Reply With Quote
Old 07-19-2013, 10:07 AM   #13
cuong-nutz
Resident 250 guru
 
cuong-nutz's Avatar
 
Join Date: Mar 2009
Feedback Rating: (9)
Posts: 4,569

Experience: 1-3 months

Bike(s):
Ninjer 250









Quote:
Originally Posted by Truckin_Thumper View Post
10K on it, more than likely GTG....maybe
Reading fail on my part
__________________
250cc's of pure Nutz
Ninjette Stunt Life Stunt Ride
cuong-nutz is offline   Reply With Quote
Old 07-19-2013, 10:08 AM   #14
TheBeeDeeGee
Senior Member
 
TheBeeDeeGee's Avatar
 
Join Date: Jul 2012
Location: Katy
Feedback Rating: (0)
Posts: 529

Experience: 4 years
Trackdays: 3

Bike(s):
2005 CBR 600 F4i
2001 RC51 *sold :(
2002 VFR 800 *sold
2002 919 *sold
2006 599 * wrecked






So I've been having an idle speed issue for a while (idle would drop too low with a hot engine), and I adjusted my idle with the adjuster screw, but now it doesn't turn anymore. ( I never turned it all the way up, but now it just won't turn anymore leading me to think there is a problem there)

I watched a video explaining how the starter valves on the VFR and adjuster screw work. What I'm thinking maybe happened is the adjuster is too far open? Meaning at idle the starter valves are too far open letting more air in, which in turn makes the ECU put more fuel in (too much) causing a rich condition and cause the exhaust popping.

Sound possible?

TheBeeDeeGee is offline   Reply With Quote
Old 07-19-2013, 12:21 PM   #15
SideVinder650
Senior Member
 
SideVinder650's Avatar
 
Join Date: Jun 2011
Location: Houston
Feedback Rating: (0)
Posts: 1,290

Experience: 7 years

Bike(s):
Suzuki SV650 2nd gen









i would say your def. on to something, why dont you bring it by Motorcycles Unlimited and let them tell you what the deal is with the idle adjuster screw
__________________
242fqkn
SideVinder650 is offline   Reply With Quote
Old 07-24-2013, 09:17 PM   #16
TheBeeDeeGee
Senior Member
 
TheBeeDeeGee's Avatar
 
Join Date: Jul 2012
Location: Katy
Feedback Rating: (0)
Posts: 529

Experience: 4 years
Trackdays: 3

Bike(s):
2005 CBR 600 F4i
2001 RC51 *sold :(
2002 VFR 800 *sold
2002 919 *sold
2006 599 * wrecked






Well I figured it out tonight. Came across this blog post about a bad FPR on a VFR800.
http://www.nashvillemotorcyclerepair...nning-problem/

I pulled the vacuum line.....turned the key and fuel came out the line. BAD FPR. Just ordered a new one. Now I just gotta figure out how to clamp the fuel line closed so I can disconnect it and install the new FPR once it arrives
TheBeeDeeGee is offline   Reply With Quote
Old 07-24-2013, 09:52 PM   #17
CraigRR
CMRA # 147
 
CraigRR's Avatar
 
Join Date: Mar 2011
Location: Crosby
Feedback Rating: (3)
Posts: 8,866

Experience: 10+ years
Trackdays: 10+

Bike(s):
2009 Honda CBR 1000RR ABS
2011 EX250NinjaR
2001 Yamaha TTR-L (sold to Jimrad)
2015 KTM RC 390 CUP






Quote:
Originally Posted by TheBeeDeeGee View Post
Well I figured it out tonight. Came across this blog post about a bad FPR on a VFR800.
http://www.nashvillemotorcyclerepair...nning-problem/

I pulled the vacuum line.....turned the key and fuel came out the line. BAD FPR. Just ordered a new one. Now I just gotta figure out how to clamp the fuel line closed so I can disconnect it and install the new FPR once it arrives
You can google it.
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	40
Size:	13.5 KB
ID:	71026  
__________________
BRAWP
CraigRR is offline   Reply With Quote
Old 07-24-2013, 09:59 PM   #18
CraigRR
CMRA # 147
 
CraigRR's Avatar
 
Join Date: Mar 2011
Location: Crosby
Feedback Rating: (3)
Posts: 8,866

Experience: 10+ years
Trackdays: 10+

Bike(s):
2009 Honda CBR 1000RR ABS
2011 EX250NinjaR
2001 Yamaha TTR-L (sold to Jimrad)
2015 KTM RC 390 CUP






Also a small c-clamp will work. Just be careful not to damage the fuel line.
__________________
BRAWP
CraigRR is offline   Reply With Quote
Old 07-24-2013, 10:08 PM   #19
buddha429
Reformed Track Addict
 
buddha429's Avatar
 
Join Date: Jun 2006
Feedback Rating: (6)
Posts: 2,884

Experience: 1-3 months

Bike(s):
at the junkyard









small vise grip will work also, like craigRR stated, be careful not to damage the line. if you're quick, disconnect and stick a screw in it.
buddha429 is offline   Reply With Quote
Old 07-25-2013, 05:33 AM   #20
Bevo
Hook 'em!
 
Bevo's Avatar
 
Join Date: Mar 2009
Location: Houston-The South Loop
Feedback Rating: (0)
Posts: 24,296

Experience: 10+ years
Trackdays: 3

Bike(s):
'12 CBR1000RR Red/Black
'14 CB1000R Matte Gray
'10 CBR1000RR (destroyed)
'09 CBR1000RR C-ABS (sold)
'09 CBR600RR C-ABS (sold)

Member Garage





Quote:
Originally Posted by buddha429 View Post
small vise grip will work also, like craigRR stated, be careful not to damage the line. if you're quick, disconnect and stick a screw in it.
Or a golf tee
__________________
Quote:
Originally Posted by bumblebee View Post
"I lack skillz"
Bevo is online now   Reply With Quote
Reply


Thread Tools


All times are GMT -5. The time now is 07:38 AM.


MotoHouston.com is not responsible for the content posted by users.
Privacy Policy