Never said I was. All I said was it gave me an overheating messag and went into limp mode.

Still in the shop overnight. No source yet.

 

 

Hope you get the matter resolved quickly, Dude.

 

Make sure your intercooler is full. This is a big thing that slows these cars down.

 

No diagnosis on the overheating yet. Found a bad sensor in the accelerator pedal? Not sure how that adds up.

 

that was my reaction to this entire thread.

 

I don't understand how the thing overheats when the A8 is in the back. Even if you tell me that the car works harder I don't buy that because you can get the car to it's limits at a race track with a M7 and never get an overheat, just weird.

 

If the A8 is left in auto it will keep the engine running at high RPM as it is programmed for maximum performance. The LT-4 gets very hot at high RPM. In 2017 and later the M7 also gets a second engine coolant radiator where the A8 front cooler sits and this cooler can be easily added to 2015/2016 M7 cars but not to the A8. Adding this additional cooler moves the Z06 from insufficient to marginally sufficient cooling.

 

Your right someone told me this already I forgot thanks anyway...carry on!

 

I have a 2016 Z06 A8 and I notice that my cooling fan runs almost constantly when I shut the car off when I've driven the car in temps in the 80's and 90's. I run with a Novistretch bra on the car always. I am sure that the reduced airflow thru the material makes the temp go up past the 200 mark on my gauge. I find that the temp is always hotter when I run in paddle mode but I would expect that since my RPM's are always higher. Does everyone else's Z06 fan run when the car gets shut off and run for several minutes? I have never seen a code that shuts the car down so I assume I've never had the overheating issue that is talked about on this thread.

 

Mine does the same thing in temps of 90-100+ in TX. Along with the sizzling sound of the AC condensation.

 

Very seldom does the fan run after I shut mine off (2016 A8) but I am not running a front bra (which will greatly impede airflow) and although I do have a front plate I am using the Top Flight Repro which moves the plate down and away from the grill so it doesn't cover a large part of the grill like the "aero plate" mount that comes with the car.

Unless you are driving aggressively there is no need to paddle shift at higher RPM. I run mine in manual mode also but when in town at lower speeds I shift when the tach reaches around 2,000 in the lower gears. For the upper gears at light acceleration it is easy to just shift by the speedometer, 5th at 30, 6th at 40, 7th at 50, and 8th at 60.

The LT-4 does heat up in a hurry at high RPM and an oddity I noticed last summer that even in engine braking mode the temperature rises rather than drops when descending long grades in lower gears. I have never experienced this in any other gas or diesel powered vehicle I have owned. It isn't a large increase in operating temperature but it did rise above its usual low RPM cruising temperature.

 

A lot of the observations of abnormal temp rise can be attributed to the Desired Temp logic. Sometimes it desires 195 and sometimes 221 depending on conditions, so yes, it will seem to "heat up" but it's never hot. My 2014 stingray ran at 220 basically all the time until I added a 160 thermostat and readjusted the cooling logic and fan logic then it cruised at 175.

What I'm saying is, it's just the computer controlling the fans.

 

Happened to me once. But, it was 90 degrees out. Prob ran 4 hrs in manual mode on my A8. Prob did over 40, 120 -150 mph roll racing sprints. There were a few cool down breaks in between, but that night, boy, I was proud of the car. I thought for sure I'd blow the ****** up. haha. I do notice that when I'm using the paddles, temps run a tad higher than if I left it in Auto mode.

 

This will be true at part throttle because Auto mode is aggressive about keeping RPMs low, to the point it's annoying and why I dumped my 16 A8 for a 17 M7. Auto mode will keep RPMs far lower and get them there far quicker than a human would by shifting with the ear.

However, under road course conditions the A8 is the opposite style of aggressive, keeping RPMs as high as possible all the time and creating more heat than a human would with the paddles.

 

I'm in looking to move up to a ZO6 (since my '06 z51 was totaled last month by a sleep deprived driver) but that's another story. I've been looking at either a C7Z or a head "addressed" C6 ZO6. All these overheating issues are scaring the **** outta me. I know all about the accelerator pedal sensor, reduced engine power issues from my wife's Trailblazer, we use to own. All the best w/your issue...

 

Please know, this is largely a case of the sky is falling. There are very few who have actually put a car in limp mode. The majority have jumped on the bandwagon for other reasons; value, free parts, generally just want to whine and moan, etc. If you are going to track your car, don't buy an automatic, other than that don't let it cross your mind once.

 

Will the car be a street car only? If YES then don't worry. I was in stop and go traffic in 108 + 60% humidity and no issue. Over 1 year and 2 summers of daily street driving in FL with no issues. I run hard on the street too. Most days I see the fun side of 100 mph so not just some old man driver. (BTW My car is a 2016 A8 car. I was tired of driving a manual in heavy traffic.)

Will the car be tracked? If YES then consider a M7 car and ideally a 2017. I just did the Corvette class at Spring mountain. I was in a 2017 A8 Z06. I was the fastest driver in my class and the car ran flawless. In June in Nevada. No reduced power, no overheat. Interesting fact was a Z51 in my group DID overheat.

Make yourself feel better go to youtube and search for C7 Z06 track day. There are tons of examples of people running on the track and not overheating. It is an issue but driver, temp and car trim makes a difference.

On the street I am not sure how a properly running Z06 can overheat. I cannot run hard enough for long enough to see even close to high temps. This coming from someone that has been 165+ in the car. If I am driving normally the oil and water are almost always stuck at 200.

Moral of story is that it is not all doom and gloom. Tons of people enjoying their Z06 on the street and even on the track.

Car is not perfect and I am not discounting that people are having issues. Just want to say not everyone is.

 

'16 Z06 A8 upgraded power adding a Meth kit dropping my temps down to ALWAYS being in the 200-220 range in all driving conditions. My fan always shuts off with the car every time. I haven't had a full day on the track but from everything I've done the temps being so low all the time I'm confident any heat limp symptoms can not occur with temps so cool.