Car shaking

[rberns]

Yesterday I took the Camaro out of the garage for a little drive. When I came to a stop light it seemed like the car would vibrate a little more than usual and then it would settle back down. When I would get on the throttle the exhaust started crackling. I put on some American Racing Headers about 150 - 200 miles ago, but during those miles it never crackled before.

I still have not gotten around to getting the car tuned yet. Any ideas on what is causing this? I understand the exhaust popping on when slowing down, but never expected it to pop while getting on the throttle.

2011 Camaro SS L99
ARH 1 7/8
CAI w/scoop
RX CC
3025 miles

[nyrfan]

Get it tuned.


Sent from my 2SS/RS

[Sftshldr]

Originally Posted by nyrfan

Get it tuned.


Sent from my 2SS/RS

Sell him your AFM delete.

[Neriah]

Maybe running lean cause of the headers. Get it tuned.... I mean hey... with my cam my car shakes and pops all the time! LOVE it.

[nyrfan]

Originally Posted by Sftshldr

Sell him your AFM delete.

My range is up for sale.


Sent from my 2SS/RS

[rberns]

Originally Posted by Neriah

Maybe running lean cause of the headers. Get it tuned.... I mean hey... with my cam my car shakes and pops all the time! LOVE it.

From my understanding headers won't make you go lean, but a cold air intake would. However, from what I have read Cold Air Inductions wont screw up your AFR.

[nyrfan]

Originally Posted by rberns

From my understanding headers won't make you go lean, but a cold air intake would. However, from what I have read Cold Air Inductions wont screw up your AFR.

But maybe a combination of both can cause an issue?


Sent from my 2SS/RS

[Sftshldr]

True, but while sitting idle at a stop sometimes the engine will drop into 4 cyl mode or under a light load and this can cause some vibration as well as exhaust note / tone changes which with a factory exhaust is not as noticeable. The range device makes the engine stay in 8 cyl mode ... always and does not mess with the factory tune.

[nyrfan]

Originally Posted by Sftshldr

True, but while sitting idle at a stop sometimes the engine will drop into 4 cyl mode or under a light load and this can cause some vibration as well as exhaust note / tone changes which with a factory exhaust is not as noticeable. The range device makes the engine stay in 8 cyl mode ... always.

This is true, I forgot about that. That's the reason the L99 has the flexible cats. OP, you may be feeling the effects of AFM.


Sent from my 2SS/RS

[rberns]

Originally Posted by Sftshldr

True, but while sitting idle at a stop sometimes the engine will drop into 4 cyl mode or under a light load and this can cause some vibration as well as exhaust note / tone changes which with a factory exhaust is not as noticeable. The range device makes the engine stay in 8 cyl mode ... always and does not mess with the factory tune.

Originally Posted by nyrfan

This is true, I forgot about that. That's the reason the L99 has the flexible cats. OP, you may be feeling the effects of AFM.


Sent from my 2SS/RS

Good point. Didn't think about that. Any further ideas of why all of a sudden my exhaust is popping when I get on it?

[nyrfan]

Originally Posted by rberns

Good point. Didn't think about that. Any further ideas of why all of a sudden my exhaust is popping when I get on it?

I've read that headers make the exhaust pop more. Can't say for sure, but ill be able to tell you tomorrow as my headers are going in.


Sent from my 2SS/RS

[rberns]

Originally Posted by nyrfan

I've read that headers make the exhaust pop more. Can't say for sure, but ill be able to tell you tomorrow as my headers are going in.


Sent from my 2SS/RS

I guess I'm fine with the popping, but I just thought it was unusual that it just started as opposed to when I put them on 200 miles ago. Definitely scared the crap out of me because i wasn't expecting it. Thought I hit something at first.

[nyrfan]

Originally Posted by rberns

I guess I'm fine with the popping, but I just thought it was unusual that it just started as opposed to when I put them on 200 miles ago. Definitely scared the crap out of me because i wasn't expecting it. Thought I hit something at first.

Well if you want to avoid tuning but want to get rid of the AFM I am selling my range device for $150 shipped.


Sent from my 2SS/RS

[rberns]

Originally Posted by nyrfan

Well if you want to avoid tuning but want to get rid of the AFM I am selling my range device for $150 shipped.


Sent from my 2SS/RS

Thanks for the offer, but I am planning on tunning it sometime this year. I have stuff going on right now...basement got some water in it, wifes pregnant...yada yada yada. Unfortunately the nearest dyno tuner is about 2 1/2 hours away.