She's got flatulence

[gggGary]

No not my wife, um well I'm not TALKING about my wife.

Going down hills using engine braking she's been farting. It's still got the air induction system (AIS) in place. Got the repair manual and diagrams out, not too much trouble shooting info in there. So found the valves with help of the diagrams, pulled the intake filter tube off the rear valve and used a mityvac on the vacuum tube I removed from the intake nipple. It pulled and held vacuum, I could feel the valve move with my finger in the intake side of the valve as the vacuum was applied and released.

You can also hear the valve move when vacuum is released. Went around to the other side for the front valve and it would't hold vacuum, quickly found a slice in the hose right at the tip of the intake nipple. Clipped a bit of line off and reinstalled. While I couldn't get anywhere near the front valve, once the leak was fixed I could hear it click when I pulled and released vacuum with the mityvac and all is good now. I'm only getting backfires from too much pizza and beer.

Like MikeWa says I think keeping pollution controls working is the right thing to do.

Edited September 21, 2016 by gggGary

[MikeWa]

Good job Gary. I have always felt it is better to repair the AIS than just disconnect it.

 

Mike

[Flyinfool]

Nice work Gary.

It is obvious that you need to keep all the pizza and beer to yourself so that she does not backfire anymore.................

[Statussymbol]

Pizza Ranch?

 

Sent from my SM-G930V using Tapatalk

[gggGary]

Well round two I'm worried she's a gonna bust open the mufflers, guess I gotta go through it again. Anyone ever win at keeping backfires away with the valves still functional?

[vzuden]

How long has it been since you sync'd the carbs? That usually takes care of backfiring

[vzuden]

gggGary. If you need help with a carb sync, I live in Madison part time and can give you a hand.

[SilvrT]

Have you checked for a leak in the exhaust anywhere? If there's a small crack in the Y-pipe, for example, and it's sucking air, you'll get some backfiring.

[bongobobny]

Also, if your AIS system is not working properly, it will cause some backfiring, especially on Deceleration...