I'm curious what a new owner of a car can do to a six (or seven) year old car where the previous owner had no issues during his/her ownership. This problem occurred in a 48 hour window and the dealer can find no issues and no problematic codes?

I don't think we're getting the whole story.

 

Something seems odd with this whole thread....

 

Did the new car euphoria wear off?
What happens when you floor it?

 

Here's an idea for the OP:

These cars supposedly will do 186 mph.

Find a nice suburban neighborhood with plenty of kids, bikes, dogs, etc. and has a long straightaway.

See if you can get close to 186 then post the results. That should tell us something.

 

Please feel free to go back and reread my posts as I gave an accurate as possible description of the timeline of events that led up to this and how I drove it before it broke honestly. Im dumbfounded by it myself. Im now in desperation for a solution. Corvette tuner shop are very far away im in rural n. carolina. Ill try diablo tuner but after two days of ownership the entire driving dynamics of the car did a 360 now its sluggish delayed and slight banging into gear . Smooth as silk, fast a hell acceleration and super smooth gear changes have completely vanished. Maybe they sold me a lemmon. I find it interesting that the car sat on te lot for months also

 

They have the best service ratings in my area I thought so anyways. I had no choice but to take it back cant force them to keep it. And when theres no code or no warning light on its not that extroidinary for a dealer not be able to diagnose the begining stages of a problem, until its broken down. Ive been driving for 25 years its not uncommon.

 

[QUOTE=Joe B.;1589710734]Did the new car euphoria wear off?
What happens when you floor it?[/QUO No not at all I dont floor cars I put it the pedal down about 75% with dramatically slower acceleration than it did for first two days with sluggish clunky knocking delayed shift cahanges feels slower than my old 300 hp Sl 500.

 

Yes it is odd ive lost a lot of seep over it. now that if diablo tuner is insufficient it will sit in the garage and rot not gonna drive a defective slow p.o.s.

 

I understand all that what im saying is that the car has done a complete 360 from the first two days of ownership it ran like deer for two days now it runs like s$!t.

 

Try running some injector cleaner through it, maybe when it sat around a couple months the tank may have had some contamination come up and its not letting the baby drink.

Make sure the engine is up to temps, mine sometimes has a rough time shifting if I take it out without letting it sit for a minute on cold days.

On that same note, if it hasn't been running long don't accelerate in a corner when it's on the verge of shifting. If i remember right it's supposed to hold whatever gear it's in during a turn, and if you don't expect the sudden shift that might happen as you come out of a corner it will feel clunky / jerky. Oh, and if you try shifting too early it will wait a split second to get closer to a proper shift point, at least in my experience, and that could also be causing the shifting issues in paddle mode.

If these don't sound like something you are having then try driving it the exact same way you did on the first couple days. Yes it's an auto, and yes it doesn't feel like 430+ HP when driving conservatively, but as soon as you push on it the baby will wake up in a damn hurry.

Also, what you feel that may be half throttle, is possibly only 1/4 or 1/3 throttle. Going full out does take some effort if you haven't done it before, I know it opened my eyes up real quick.

 

Reread my posts the car was running dramatically differant for the first two days of ownership now its running slow as dog crap with shift bang delayed acceleration slow or no throttle response at all . I press the gas half way down with absolutely no response at all or slow as crap acceleration.my argument is that car has done a 360 .

 

"Trans shifts into gear harshly, car feels sluggish off the line, No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only available gears, CEL is on: transmission is either in limp-home mode or has lost electrical power. If there are lots of error codes in the PCM, check the underhood fuse that powers the transmission, and if it pops again, look for a short in that circuit like an O2 sensor harness touching exhaust. Otherwise, check PCM codes for a particular fault in the transmission causing the PCM to put it in limp-home mode."

I found this on this website:
http://gmlongroof.4umer.com/t6394-common-4l60e-problems

You gotta be in in Limp Mode...

 

Have you tried changing driving modes??? Such as putting it into competitive mode?

 

The bottom line is that the car is driving like complete crap than what it was for the first two days of ownership. I stopped driving it because power, smoothmess has completely vanished, now its a slow clunky jerky slow as crap p.o.s.. Dont have to be a mechanic to know that something went wrong, wich it clearly did thanks for your help my friend. P.s. i ran lucas cleaner through it and made it feel even less respnsive . Great car im so glad I bought one what a joke. Lesson painfully learned

 

Yes I did its significantly slower when other modes are engaged especially competative driving mode wich is the slowest and most sluggish. Feels like a 200 horsepower v6 all jokes aside its pathetic

 

Thank you for this is the best advice ive seen very comprehensive, ill have to have local shop do it, I dont know squat about motors aside from performance numbers id probably break it more.

 

I would go to your Chevy dealer - they have the Tech II to properly get the fault codes. Don't worry...they will fix it.

 

Little tidbits pop up from time to time, but he doesn't reveal it easily. Kinda like that fact that the car sat on the dealer's lot for months before he bought it. And that he ran Lucas cleaner through it which made the problem worse. Or the part about he filled the tank with 93 octane (no mention of how much), when that's normally what a dealer does when completing a sale. And that he paddle shifted to 1st gear at 50 MPH, which if it actually shifted would cause a mechanical over-rev and possibly done engine/trans damage that won't show up on a techII.

The weird part is that he's never gone WOT or exceeded 5000 RPM, yet believes he can accurately determine rates of acceleration by some magical means of precisely pushing a pedal to a specific percentage of distance. Like how can you know what 50% of something is, unless you know what 100% is? I fail to understand how you get "fast as hell acceleration" at part throttle.

Did he even have a mechanic drive the car? If so, did he go along for the ride? Did the mechanic go WOT? If there was a test drive and the mechanic felt it was fine, then maybe the OP's foot needs re-calibrated. If all the mechanic did was check for codes and saw no CEL, then the OP failed to present enough concern for his assumed problem.

Just a lot of gaps in the story and the biggest being what the circumstances were at the precise moment that this problem occurred.

Maybe someone local should take it for a drive if he fears WOT himself. Of course, he never filled out a profile, so other than this thread he's never revealed anything about himself (or herself) or the supposedly reputable dealer.

 

wow HOXXOH are you a detective working for GM service dept ? I need help not interrogation. Why do I need a profile Im not the one having mechanical issues my car is.Please feel free to ask any questions about gaps in my fabricated story cause I dont have anything better to do with my time. Anyway im trying to give relivant facts instead of writing a book you dig.If you must know all the details here you go : Dealer is Flow chevrolet in N.Carolina. No I didnt go on the test drive for they were busy and I was running late for work.Yes at part throttle it was snapping my neck back with instant powerband sord of speak now its not .I put cleaner in on empty tank then filled up 3/4 full per advice of product.Its real simple was running fine for two days now its running like complete s!#t .Ever heard of a lemon ? Not the kind you eat.Is that clear cut enough.Im very upset about my corvette is broken I didnt know you had to baby them like a toy , maybe thats why mostly senior citizens drive them. Im trying to compile enough data for process of elimination, so in the event I have to go to a private mechanic shop I wont get ripped off . But I have to agree the only other answer to this mystery is that the tranny has been compromised. This is what I thought all along from day one. Its just hard to fathom a couple of mild shifting mistakes can take down the almighty corvette overnight. I thought GM trannys were extremely strong. I seen people do much much worse to there cars and beat the snot out of there transmissions for years and not have a problem.The Bottom line is that GM products are **** poorly made. Quality control is ludicrous and primitive in comparison to foreign cars.I put my faith into Chevy one time and got a painfull and expensive lesson. I would like to thank everybody for taking the time to help me out unfortunately ive decided to dump it like the trash it is . And go back to foreign cars that Ive had so much succes with . Thanks again God Bless

 

Sell it and move on. It is obvious you don't like GM or Corvettes.