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07-13-2012, 07:57 PM | #1 |
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Location: hadley,pa
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popping and backfire
Just installed vance and hines slash cuts on 11 voyager now have pop and snaps when decelerating. any suggestions?
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Jim hadley,pa. 2011 Voyager 1700 VBA. #01941 ROK Login or Register to Remove Ads |
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07-13-2012, 08:11 PM | #2 |
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Location: Utah
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Do you have a power commander or a cobra FI2000 installed? I believe after changing out your exhaust from stock to either a V&H or Cobra, and not adding one of those listed above, the popping noise is normal for that situation. I am sure others will jump in and expalin why this happens.
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2006 Nomad KawaNow #01849 |
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07-13-2012, 08:24 PM | #3 |
Join Date: May 2009
Location: Montreal QC
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Or, leaks in the exhaust pipe connections.
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Norm Ward 2008 blue / silver nomad kawanow / VBA #01136 |
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07-13-2012, 08:37 PM | #4 |
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Location: Utah; 2004 Nomad 1500
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It's likely caused by unburned fuel in the exhaust, common after installing new exhaust. You don't hear it with the OEM system. Gadget's site has the fix, worked for my '04, way before I installed a PCIII.
http://www.gadgetjq.com/smogstuffremove.htm |
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07-13-2012, 11:17 PM | #6 |
Join Date: Aug 2007
Location: Newmarket Ontario Canada
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You most likely have an exhaust leak at the header gaskets, sometimes it takes a couple attempts to get them to seal.
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2002 Nomad aka Bountyhunter VBA #27 VROC #18951 |
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07-14-2012, 08:04 AM | #7 |
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As they are fairly inexpensive, I would get a new pair of crush gaskets if you didn't when you installed the new exhaust. Check the torque specs for the headers also.
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07-14-2012, 09:31 AM | #8 | |
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Quote:
or eliminating popping on decel. RACNRAY
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"TRUE HAPPINESS IS IN THE HEART, NOT IN THE OUTSIDE FIXES" WITH OVER 46 YEARS AS A MOTORCYCLE TECHNICIAN/HI-PO SHOP OWNER I AM A PURVEYOR OF FACT NOT FICTION! "WE LIVE OUR LIVES IN CHAINS NEVER KNOWING WE HAD THE KEY" |
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07-14-2012, 11:01 AM | #9 |
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Location: Utah; 2004 Nomad 1500
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Exactly, I used the marble method mentioned on Gadget's site and it worked fine.
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07-14-2012, 03:54 PM | #10 |
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Location: hadley,pa
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looked at gadgets fix but i think the 1700 is different could that be possible
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Jim hadley,pa. 2011 Voyager 1700 VBA. #01941 ROK |
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08-18-2013, 06:45 PM | #11 |
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Location: Houston, TX
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Is this also the case if you have the Vance and Hines slip-ons with the Dyno Jet PC on a new 2012 Vaquero?
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09-21-2013, 09:10 PM | #12 |
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Location: Lake Mary Florida
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I have the same issue after installing the V&H slash cuts. i also thought gadgets remedy was for an older carburated vulcan? did you ever find a resolution to the popping?
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04-29-2014, 03:45 PM | #13 |
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Join Date: Apr 2014
Location: Calgary Alberta Canada
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I just installed vance and hines pro pipe chrome full system, made sure all bolts and nuts were tight, engine backfires on slow speed decelerating, 3-1 gear. No backfires on acceleration. Any suggestions????
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04-29-2014, 04:49 PM | #14 |
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Do you have an aftermarket intake or a fuel processor? Need more info.
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Dave "(dshelly)" Shellenberger 2014 Harley Ultra Classic 2007 1600 Nomad (Black) Shellenberger Machine Belgrade, MT Various Bagger Member (Harley Chapter) VBA # 2395 |
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04-29-2014, 05:55 PM | #15 |
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You wouldn't happen to have a picture of this hose would you? I'm trying to figure out where it is on the air box
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