What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[the_tool_man]

Yes hemholtz chamber aka ¼ wave. It works pretty well considering i didn't do any math i just copied what some of the guys on one of the forum's for a Silverado in my searching. My 2k rpm drone is gone. My afm still is annoying but will be going away eventually.

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They're pretty effective over a fairly wide range of RPM. So getting the length exactly right isn't that important. On my car I had to make the tubes a little shorter than theoretically optimum, because the transmission crossmember was in the way. And besides, the exact frequency depends on the temperature of the exhaust gasses, which I could only guess at when doing the math. Still, it worked very well.

The only downside was trying to sell the H-pipe later. No one could understand what the pipes were for, and didn't want to buy it modded. The guy who bought it cut them off.

 

[Sam Harris]

They're pretty effective over a fairly wide range of RPM. So getting the length exactly right isn't that important. On my car I had to make the tubes a little shorter than theoretically optimum, because the transmission crossmember was in the way. And besides, the exact frequency depends on the temperature of the exhaust gasses, which I could only guess at when doing the math. Still, it worked very well.

The only downside was trying to sell the H-pipe later. No one could understand what the pipes were for, and didn't want to buy it modded. The guy who bought it cut them off.

Morons!

 

[iamdub]

...It works pretty well considering i didn't do any math...

 

[Derick]

Got the burb back from the mechanic. Installed junkyard diff with a warranty, and it doesnt seem like it drives on rumble strips anymore. Just had a drive home, so need to put more miles on it to get a full feel of it.

 

[PG01]

Got the burb back from the mechanic. Installed junkyard diff with a warranty, and it doesnt seem like it drives on rumble strips anymore. Just had a drive home, so need to put more miles on it to get a full feel of it.

And you were gonna sell it..... c’mon.....

 

[Derick]

And you were gonna sell it..... c’mon.....

Still nothing saying I wont, but I cant sell it with a hosed front diff.....I looked back, I've put 10k on it since April, so I'm going to drive it into the ground I think,

 

[Derick]

Le sigh. Now I have a misfire. fml.

Actually, its somewhat of a good thing. This MIGHT have been a long standing issue with my truck and an odd, non linear power curve. It would get up to 3k just fine...then kinda stumble, and then kinda sorta pickup again after 3700...it felt like a minor problem, but never ran rough and never threw a code. So now, I'm hoping it's just the coil pack and that will sort out a long standing issue.

So right now, if I get my foot into it, full steam, once it hits the 5k redline, it throws a code. So I'm really thinking bad coilpack.

 

[Doubeleive]

Le sigh. Now I have a misfire. fml.

Actually, its somewhat of a good thing. This MIGHT have been a long standing issue with my truck and an odd, non linear power curve. It would get up to 3k just fine...then kinda stumble, and then kinda sorta pickup again after 3700...it felt like a minor problem, but never ran rough and never threw a code. So now, I'm hoping it's just the coil pack and that will sort out a long standing issue.

So right now, if I get my foot into it, full steam, once it hits the 5k redline, it throws a code. So I'm really thinking bad coilpack.

whats the code?

 

[Derick]

P0306 and a new coil didn't help it any. Goes and hard shifts too.. But sometimes clears itself

 

[Derick]

whats the code?

I put lots of troubleshooting stuff in here if you feel like sniffing around;

https://www.tahoeyukonforum.com/threads/lets-talk-about-a-misfire-code.121675/