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General Category >> Rubber Side Down! >> Stupid mistake, now backfire in acceleration.
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Message started by Dellik on 06/03/13 at 17:25:16

Title: Stupid mistake, now backfire in acceleration.
Post by Dellik on 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 :-[ 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

Title: Re: Stupid mistake, now backfire in acceleration.
Post by Dellik on 06/03/13 at 17:43:16

Forgot to mention, it starts up and idles just fine.

Title: Re: Stupid mistake, now backfire in acceleration.
Post by Serowbot on 06/03/13 at 18:19:11

The line is gone,... I hope you blocked the tap it used to attach to... :-?...

Title: Re: Stupid mistake, now backfire in acceleration.
Post by Dellik 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.

Title: Re: Stupid mistake, now backfire in acceleration.
Post by Super Thumper on 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.

Title: Re: Stupid mistake, now backfire in acceleration.
Post by Super Thumper on 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.

Title: Re: Stupid mistake, now backfire in acceleration.
Post by justin_o_guy2 on 06/03/13 at 20:48:58

Spray wd40 around the vacuum ports. If the idle changes, its leakingf,.

Title: Re: Stupid mistake, now backfire in acceleration.
Post by Routy on 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

Title: Re: Stupid mistake, now backfire in acceleration.
Post by Dellik on 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?

Title: Re: Stupid mistake, now backfire in acceleration.
Post by Jolly Executioner on 06/05/13 at 17:01:01

I believe those are vent tubes.

Title: Re: Stupid mistake, now backfire in acceleration.
Post by justin_o_guy2 on 06/05/13 at 17:01:30

Vents they are

Title: Re: Stupid mistake, now backfire in acceleration.
Post by 87 savage on 06/05/13 at 17:27:38

15343D3D381A383D3D3423510 wrote:

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.

Title: Re: Stupid mistake, now backfire in acceleration.
Post by Serowbot on 06/05/13 at 17:38:55

you may be confusing the two vent lines, and the vacuum line... :-?...

Title: Re: Stupid mistake, now backfire in acceleration.
Post by Dellik on 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.