'96 Ultra Glide Classic backfiring issues....

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Apr 6, 2010 | 01:40 PM

madmax4404

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Stage II

Joined: Apr 2010

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'96 Ultra Glide Classic backfiring issues....

I am having backfiring issues with my bike. It backfires when I let off of the throttle. I have had a compression test done and it was ok. I am kinda at a dead end as to what the problem may be. Anyone have similiar problems or know of a good solution?? Thanks in advance.

Apr 6, 2010 | 02:11 PM

EVOrider

Stellar HDF Member

Joined: Feb 2007

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From: Russellville, Arkansas

I had a crack at the Y-Pipe creating a pretty good exhaust leak. I would let off the throttle quickly and it would backfire. Repaired the exhaust and the backfiring went away...or at least I couldn't hear it anymore.

Is your bike EFI or carburetor? A few Glides had EFI at that time....and that old system was/is know to do funky stuff.

Apr 6, 2010 | 02:45 PM

madmax4404

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Stage II

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My bike is an EFI. What kind of funky issues is it known for?

I did have a crack in my y-pipe but it was repaired (welded) back in late '08. Thanks for your help. I am gonna take it off and check this.

Apr 6, 2010 | 02:47 PM

terry rowland

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96 ultra fuel injection

I have always had this problem. Eager to also find the answer.

Apr 6, 2010 | 04:38 PM

EVOrider

Stellar HDF Member

Joined: Feb 2007

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From: Russellville, Arkansas

The older EFI Magnetti Marelli definatley had its shortcomings....I've seen several backfiring issues due to the throttlebody. Check around the throttlebody for any intake leaks.....

If check engine light is on.....fix this first
I would start by cleaning the throttle body.....

Then make sure everything is adjusted properly.....cold/hot idle. Make sure the Idle Speed Control is working. A malfunctioned one can cause some really strange issues.

Rer-oute the crankcase breather so all the oil does not dump into the aircleaner.....for some reason, that itself cured many problems I use to have.

Anyways, check the throttle body really well.

Apr 14, 2010 | 12:34 AM

mkizer

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mine did it all the time and would die when stopping, replced the heat sensor on the front head and all was cured!!

Apr 14, 2010 | 02:28 AM

V2Evo96

Road Warrior

Joined: May 2009

Posts: 1,945

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From: Victoria, Australia

My 96 FLHT had decel pop below 2500rpm which turned out to be-- you guessed it--- crack at the Y pipe which on examination had been repaired before.

I nailed a complete system from an 02 model including heat shields, but excluding mufflers on Ebay USA for $60 USD-- cost me another $60 to get it here but well worth it.