^i say that sounds about right

 

Only one way to find out.

 

I can't take that chance LOL

 

This would be great to know. This would finally set everyones IDEAS to rest. It would be nice to know which is the way to go, tune with extra ECU or just tune it and go back to stock. As many times as the tune subject has been brought up, you would think someone would know if their warranty would be voided from getting a tune then going back to a stock tune or getting a tune and a seperate stock ecu.

Please let us know which is the way to go, more than likely I will be waiting on my tuning until I know pretty much for sure which is the way to go. I will not waste my money on the stage one tune. It is not worth nearly $1k just to have 30hp.

 

false, trifecta takes data logs of your car and then tunes it, its not a canned tune at all. Vince is a great tuner and has been getting better numbers than alot of dyno tuned ss/tc's. The only canned tunes are superchips and the hahn tune i think?? Trifecta is not a canned tune. HPtuners is not a big waste because people can take their tunes and adjust them slightly if they get a new mod. ITs cheap and it works.

 

If there is a dyno shop charging $125 for a full dyno tune or any type of real tune. The cheapest I have ever heard of for a tune is $250. Full dyno tunes are generally $400-500. Retunes are generally $150-200.

 

Reading comprehension > You

I said Buying HP tuners is a waste 700$ when you can get a real tune for 1/2 the price $350,

Then I said retunes at any reputable shop should be around 125$

 

Correct until GDS rolls out then its a whole different ballgame. Spare ECM is still the way to go.

 

What's GDS?

 

Global Diagnostic System, from what I gathered from a google search, its an evolution of the Tech 2

 

Spoke with the electronics tech at a dealer today and according to him "there is no way to tell if a previous calibration was done, there are no footprints to trace. The tech 2 can only read the existing calibration file, that's it". It's just dealers trying to scare people.

 

Except for the Bosch Diesel controllers that are in the same family DO log the last ten flashes That feature is in the LNF ECM I havent checked to see if its on or not though my guess is its off but when GDS rolls out all bets are off hence why I recommend people not screw with the stock ECM

 

I read what you said but what you failed to mention is that the initial dyno tune is usually $400-500 same as what HP Tuners costs.
I can change all my settings at will on my car so if I dont want my car to be ***** to the wall I can turn it down, then when I want to tear the tires off I can flash my full kill tune into my car. To each his own but HP Tuners is not a waste of money IMHO. I tune other peoples cars for them too so how is that a waste of money?

 

When exactly will this GDS "roll out"? I really want to buy a second ECM to tune, then put Stage 1 on my stock ECM. But if GDS is coming out soon, then there may not be a point if that would guarantee a voided warranty.

 

maybe i'm just missing something, but from what i just read about the gds, it lists the camaro and cruze and some buicks and stuff but nothing about cobalts. kinda seems like it has a whole different ecm or something, as in not something they can just make our ecms do. it says if you swap out to another ecm from the cars that use the gds then the car wont even start cuz the security codes don't match up. and people on here have started their cars with different ecms before so we know thats not happening. i'm not positive about how all that stuff works, but thats just what i got from a quick google search

 

GDS is a diagnostic tool that a Dealer can hook to your car just like a tech2 . The best way to describe it is it's GM's HPTUNERS lol. They will hook to your car with a laptop and be able to see things that a tech2 never dreamed of .

 

im gonna be harsh because i think this is an important thing that is hard to find information on and is the first thing you should know when you get involved with an LNF. If some1 made it this blunt when i started out it would have helped


If your gonna tune this car your a MORON if you dont find a spare ECU. Find one with the option of getting your Vin in it. Performance Autowerks sells them now I believe. Google them. WELL WORTH THE MONEY Dealer CANNOT TELL. Had several services done and they always blame it on my aftermarket parts and say they will not diagnose a problem untill everything is returned to stock. Never once had a problem, and had a technician scan my ECU looking for a tune and told me "thank god you didnt do anything to the computer cause they tell us to check for that 1st thign when one of these comes in" I dont trust trifecta hidden tunes, if its on the ECU and my cars in the dealer im nervous. if the stock ECU that was never touched is at the dealer i can sleep at night. No mileage is stored on it and the date of the loaded flash is well b4 you owned the car. No worries. Best possible way to do it if you can. Oh and ALWAYS tune the NEW ecu. leave the old one. keep it in the car in the trunk. you break down, put stock ECU in, put the tuned one in a bag or whatever, call a tow truck. cars at the dealer with stock ECU in. ur safe.

 

They wont be able to tell, but if you bring in a grenaded car that all the OBDII readyness tests are pending on.......... it would be a pretty good indiction (to me anyway) someone had swapped the ECU recently. So, my advice would be to say you unhooked the battery to try and fix whatever was wrong, or some bullshit excuse along those lines.

I have no reason not to believe someone like GTPprix, but its interesting they chose not to track milage in the BCM+ECM. Even the old Neon SRT4's did that and they would check that the SECOND you hit the dealership asking for your tires to be aired up even

Edit: Also is GDS for all GM cars or just the new Global A stuff? I read the GM Techlink pretty regularly and those cars look to be a PITA.

 

On my Dashdaq, you can see the ECU take note of things like:

Number of cold starts
Miles since reset
Miles since CEL came on
Miles since last cleared CEL
etc...
(Does not keep track of total miles...)

Not trying to make people paranoid. A full reflash should clear everything and start fresh (and would be the equivalent to if you "disconnected the battery" to do or check on something).

 

yea thtas all i would say, "I tried to look at it myself and disconnected the battery but it still wont run right"

 

Prove it.

 

exactly.

 

Total mile data is written and stored on the BCM, not ECM as previously mentioned by Term and Stamina. I found this out because I had my ECM replaced under warranty a few months after I bought my car and had asked how mileage, oil life, trip mileage, etc. was stored.

 

I had a friend who popped his engine and was running the trifecta hidden tune and they couldn't find any evidence of an aftermarket tune so they replaced his engine under warranty.

 

Hmmm...... Why did the motor pop in the first place?