2011 CST-V - Mid life crisis car?

Well I did a thing. 2011 ctsv coupe, 95k miles. 

Price was RIGHT. I have been having the fast car itch for awhile. It needs some work. Rear end is whiney. Interior needs a detail, front bumper lip is gone. Headlights foggy. 

Rear end is the priority. Dealer quoted 6k. Likely going used (I have a line on a 53k unit.) 

Should I add a diff cooler while I'm in there? 

RV is going up for sale is anyone is interested. 

Hey, another member of Irate. Seen your thread over there on this.

That is bada$$. Those are very fast. 

In reply to untchabl :

Ha yep! Been on irate since pirate went down. 

In reply to OjaiM5 :

I need more seat time. But it will blow the tires off at a 40mph roll! 

Welcome to the LS darkside. If the diff is that beat check on that trans fluid asap. The 6L90 in the CTS-V is quite a bit stronger than the 6L80 but those 6 speeds are pretty picky about fluid and heat.

In reply to RacetruckRon :

I will do that! Thank you. 

Went out for a rip, service traction control keeps popping up with a flashing check engine light..... 

I'd check for a misfire, the GM's like to flash a service traction control message when there's a misfire. 

In reply to java230 :

I hate to ask, but any idea on price for the rv?

In reply to rico750sxi_2 :

I will check, there was a stored misfire code when I got it. I cleared them all. I'll have to see if it's back. Scanner is at the shop.... 

Coil packs? 

In reply to dculberson :

Listed previously, a few bites but no traction. Thinking of re listing at 75k.....

I had better hurry up on the mid-life crisis car, as it stands I have to live to 110. 

Get a good replacement diff and change the fluid on a regular basis, no need for a diff cooler unless tracking the car a lot.  My 2010 has almost 100K more miles and diff is quiet, most likely replaced early in its lifetime.   If you get a flair/slipping going into 3rd gear under power, the forward drum in the trans is leaking and will need to be replaced (this was the issue with my car).  You can see more on this in my project thread (a bit older now)  CTSV

In reply to 81cpcamaro :

Thanks, I will definitely be changing the fluid often.... Do you run the GM fluid or soemthing different? I was thinking perhaps over filling also, it seems the pinions dont get lubed well from my readings. No shift flare that I notice, but I dont have many miles on it yet.

I ran Amsoil fluid but didn't overfill it.  Been driving for a few years (will be changing it here soon) with several autox events without any issues.

P0300, misfire 

Electronic brake lock, one code that's unknown. 

Plugs first. Then perhaps coil Packs 

In reply to java230 :

Toss a decent plug at it like an NGK TR6. Those are kinda the go to for light boost LS stuff. 

In reply to RacetruckRon :

I picked up Bosch 9602, if those were a bad choice, someone tell me before this afternoon so I don't install them

In reply to java230 :

Those iridium OE style plugs should be good to swap out the existing plugs to make sure you don't have cracked porcelain that's causing that random multiple misfire code. If you have a misfire under higher loads that persists here's some good reading on forced induction LS car plugs https://sites.google.com/site/sloppywiki/everything-ls/spark-plugs .

In reply to RacetruckRon :

Thanks! I will give it a read.

I have the plugs already, so I will probably just swap them for the moment. I will look at the existing ones and see what they look like. I am hoping they are just original and toast....

In reply to java230 :

I'm hoping you find a plug with a visible crack in the porcelain or a burnt plug wire.  Do you have a code reader or scanner that can pull up individual cylinder misfire counts?  It would be nice to see if just one cylinder was misbehaving to narrow down the scope of what's going on.

In reply to RacetruckRon :

I do, Its smarter than me tho, I need to learn how to use it.... I believe it will log and save it also.

No idea how to export the logs, but misfire 1 3 4 5 6, 6 being the worst. 

I got service Stabilitrak this time, no flashing check engine light. It was a short trip

So it's got msd wire. With the factory heat shielding boot. 

Does that spring look like it would keep the boot from seating? The plug end of the wires looks pretty crusty