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Stupid mistake, now backfire in acceleration. (Read 175 times)

Dellik

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Boise, ID
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Stupid mistake, now backfire in acceleration.
06/03/13 at 17:25:16

I have a 1987 Savage with 22000 miles. I installed the Raptor Petcock a couple of days ago, new spark plug(Champion RA6HC), new oil(Rotella t6). No carb adjustments or mods. When I installed the petcock I forgot to plug the vaccuum line Embarrassed

and I rode on it for a little while, parked it, started it up again and it backfires like crazy when I accelerate and sustain speed, I plugged the line and I still does it. Do I need a carb rebuild? :'(

Boise, ID

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Dellik YaBB Newbies Offline Rock and Roll Posts: 6 Boise, ID Gender:	Re: Stupid mistake, now backfire in acceleration. Reply #1 - 06/03/13 at 17:43:16 Forgot to mention, it starts up and idles just fine.
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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28674 Tucson Az Gender:	Re: Stupid mistake, now backfire in acceleration. Reply #2 - 06/03/13 at 18:19:11 The line is gone,... I hope you blocked the tap it used to attach to... ...
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Dellik YaBB Newbies Offline Rock and Roll Posts: 6 Boise, ID Gender:	Re: Stupid mistake, now backfire in acceleration. Reply #3 - 06/03/13 at 18:28:51 I forgot to block it and rode for about 20 miles no problems, the backfire started happening and I blocked it and it continues to backfire.
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Super Thumper Senior Member Offline 2001 LS650 With 97mm Big Bore Kit, Stage III Cam. Posts: 469 Windsor, Vermont Gender:	Re: Stupid mistake, now backfire in acceleration. Reply #4 - 06/03/13 at 19:50:32 I think you still have a vacuum leak...I don't recommend you plug the line, especially with a bolt.....remove the vacuum hose and use a properly sized vacuum cap on the carb's vacuum fitting.
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Super Thumper Senior Member Offline 2001 LS650 With 97mm Big Bore Kit, Stage III Cam. Posts: 469 Windsor, Vermont Gender:	Re: Stupid mistake, now backfire in acceleration. Reply #5 - 06/03/13 at 19:56:38 I forgot to mention....you might want to check the spark plug to see if it shows a white insulator tip (instead of tan or light brown)...this means a hot/lean condition and could be caused by a vacuum leak.
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Stupid mistake, now backfire in acceleration. Reply #6 - 06/03/13 at 20:48:58 Spray wd40 around the vacuum ports. If the idle changes, its leakingf,.
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Routy Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 2280 Winston Oregon Gender:	Re: Stupid mistake, now backfire in acceleration. Reply #7 - 06/04/13 at 08:53:51 You dint hurt anything by running it 20 minutes w/ the vacumn line open,.....if that was your question
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Dellik YaBB Newbies Offline Rock and Roll Posts: 6 Boise, ID Gender:	Re: Stupid mistake, now backfire in acceleration. Reply #8 - 06/05/13 at 15:53:59 The two lines coming off of the top of my Carburator are not drawing any air, are these vaccuum lines?
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Jolly Executioner Junior Member Offline Posts: 58 Waiuku, New Zealand Gender:	Re: Stupid mistake, now backfire in acceleration. Reply #9 - 06/05/13 at 17:01:01 I believe those are vent tubes.
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Stupid mistake, now backfire in acceleration. Reply #10 - 06/05/13 at 17:01:30 Vents they are
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87 savage

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Re: Stupid mistake, now backfire in acceleration.
Reply #11 - 06/05/13 at 17:27:38

Dellik wrote on 06/03/13 at 18:28:51:

I forgot to block it and rode for about 20 miles no problems, the backfire started happening and I blocked it and it continues to backfire.

Ok, just so we're clear, when you rode it for 20 min with the vacuum line NOT plugged you had zero problems then shut the bike off. You started it back up and then it started to backfire? Or, did you ride it with the vacuum line NOT plugged and after 20 min it started to backfire so you shut it off and plugged the line. And now it continues to backfire? Oh, and is it backfiring from the exhaust, or is it popping out of the carb? I'd definitely take a look at the plug.

His: 1987 LS650F stock except for 98 engine, Dyna muffler. Hers: 2008 S40 with factory bags, windshield and sissybar.

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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28674 Tucson Az Gender:	Re: Stupid mistake, now backfire in acceleration. Reply #12 - 06/05/13 at 17:38:55 you may be confusing the two vent lines, and the vacuum line... ...
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Dellik

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Boise, ID
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Re: Stupid mistake, now backfire in acceleration.
Reply #13 - 06/05/13 at 17:45:32

Rode fore 20 min without plugging the vaccuum line. Parked the bike for two minutes. Started the bike up and accelerated, started to backfire sporadically, definitly out of the pipe sounds like a gun going off. Parked it again, plugged the vaccuum line, still backfires out of the pipe. I replaced the spark plug with the Raptor so it still looks new.

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