Question about 2003 Honda VT 750 CD Shadow A.C.E. Deluxe

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Engine miss fire and occasional backfire.

Bare with me on this description. It is a specific situation when I am getting the missfire. Sometimes i get engine miss when almost coasting. At that point when you are going down hill but just giving enough throttle to maintain speed. There are only a few hills around where I live that I get to exprience this on but it is annoying. I have changed the plugs and that didn't help. Starting to think it might be a timing issue. Because like the miss I occasionally get a really loud backfire when letting off the throttle going into a coast. Any Ideas?

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  • Anonymous Apr 07, 2009

    I dont have the missing problem but i do have the backfire poping. I have a shadow ace 1100cc. I have put on vance and hines pipes which look good and are loud but they will pop when I back off on the throttle. I have had my carbs jeted and i have a k&n airfilter. I also did a compression check to make sure nothing was wrong. And i know for sure that it is not the back pressure any ideas?

  • n8081xrey May 25, 2009

    i have 2002 750 it also runs good with throtal on. going slow light throtal it will backfire inintake and **** driveline. it does not do this with choke on.

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Hi and welcome to FixYa,

Initially, a couple of ideas you may want to consider/explore:

  • if still using carbs, then lean air/fuel mixture or if using aftermarket filters such as K&N, then rejetting required;
  • if using injectors, exhaust issue, aftermarket muffles/pipes are installed with no re-mapping done.
Good luck and Thank you for using FixYa.

Posted on Jan 04, 2009

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750cc engine is back firing changed spark plugs twice tried different gaps but still back firing

Posted on Oct 24, 2009

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