Question about Harley Davidson FLHTCUI Electra Glide Ultra Classic Motorcycles

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Throttle position sensor noisy

Just had a set of Vance and Hines true duel pipes fited and a high flow HD air filter along with a retune using a screaming eagle race tuner problem is that now what sounds like the throttle position sensor is very noisy when i turn the ignition on ( sounds like it is going to full on and back to off ) , is this due to the retune , the lack of the original air filter back or is the position sensor on the way out . The bike seems to running ok starts well and definatly has more low to mid range power and the bonus of better fuel economy , the engine fault light and security light both go out after the prescribed 4 secs so there seems to be no faults , bike is a 2007 FLHTCU .

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  • 409 Answers

Are you sure it's not the idle air valve as they can sound louder after changing to a high flow filter...take the filter off and shine a light in the intake when turning the ignition on and off. The idle valve is just inside the intake in a hole at the top...see if it moves in time with the noise that you hear

Posted on Mar 24, 2014

  • Peter Luyks
    Peter Luyks Mar 25, 2014

    Good tip , I'll give that a go on the weekend and let you know how I go


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Posted on Jan 02, 2017

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SOURCE: 2007 night train vance & hines pipes &

It probably isn't oil, it's more than likely fuel mixed with carbon due to running too rich. check your settings on the fuel pak.

Posted on Aug 27, 2009

  • 1 Answer

SOURCE: Backfire and popping after installing vance & hines longshots

Let me know via if you get a solution, Mine is doing similar but mine is holding back at half throttle to, Wont rev high at all just chokes under load

Posted on Oct 20, 2009

  • 1 Answer


Hi Ken, my 2001 RK did the same thing until I had the Rinehart Tru Duals and mufflers put on AND a Thunderslide with Dynojet jet kit. That was the big problem the stock slide even though Harley supposedly reworked the carb when the 95" big bore kit was installed. Well it had the wrong jets and the stock slide. I have 35k miles on the bike. It now dynos at 82HP 94 Torque at 96 degree air temp. It runs great and no pops, backfires or misses except at slow speed because of the cams it will lope or surge.

Posted on Apr 27, 2010

SOURCE: i have a 2008 flhx

I've heard great things about the Terry components tuner but havnt used one yet. If u plan on doing any motor work or anything in the future I would use the hd super tuner. The power commander is also really nice and there are alot of maps available online for free. If u have a local dealer or shop u like using, see what they prefer to tune with on their dyno, that way if u have an issue with the bike they will be familiar with the component. Good luck!

Posted on Sep 04, 2010

  • 500 Answers


Settings ?? TFI .. I have same bike K&N ac wild pigs 2 1/4 bafle dealer down load my settings 2.5 ..3..4.... I hear burbling not backfiring .. I have welded a splitter at end of baffle ..

Posted on May 05, 2011

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1 Answer

I resently install a new screaming eagle high flow intake along with new pipes and had the bike tuned, if I went back to the stock air cleaner would the bike need retuned again 2010 Electra glide

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1 Answer

Back fire with vance hines pipes

Sounds like it is running lean. The ECM must be remapped for a performance breather and/or free flowing pipes. I would use H-D Super Tuner or have a dealer do a digital download to remap the ECM properly for the changes you have obviously made. You may do great harm to your engine if you run it without the mapping change as the VE will be changed and the ECM doe not know what is physically going on with VE if it is not mapped into the ECM

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My 97 fat boy seems to run lean and has a hesitation when the tap is opened. Works fine with the choke on. No induction leaks that I can find. Has stock carb, vance and hines 2-1 exhaust.

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I have a 2005 vrscb v-rod and vance n hinces pipes with a vance n hince feul pack and my plugs are burning white

did you doing the fuelpak settings yourself?
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If you don't have the sheets with the values go to the V&H website and you can enter your data there and download the proper settings
hope that helps

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1 Answer

I have a 2000 Honda VT1100 Sabre Shadow. It's got aftermarket Vance and Hines pipes. It continues to have a backfire when moving up through the gears. I've had the jets (and K&N filter and plugs)...

When you installed the Vance and Hines pipes did you use new gaskets? Popping and backfiring is often caused by leaking copper o-rings in the head to head pipe connection , or head pipe to muffler gasket. Sealing the system will prevent oxygen igniting the unburned fuel in the exhaust pipe. Hopefully , this is all you need to stop the popping.

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2007 night train vance & hines pipes & fuel pack w/K&N air filter. Just discovered oil on top of rear cylinder

It probably isn't oil, it's more than likely fuel mixed with carbon due to running too rich. check your settings on the fuel pak.

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3 Answers

Backfire and popping after installing vance & hines longshots

Let me know via if you get a solution, Mine is doing similar but mine is holding back at half throttle to, Wont rev high at all just chokes under load

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