Cobalt 2.4 Write Issue

[Nightridercobaltss]

I Have a Cobalt 2.0 LSJ. A friend of mine has the Cobalt 2.4. So tonight I went to scan his car is scanned fine no issue we made a few very simple changes then as per the HP tuners instruction I do a “Write Calibration Only” after it erases the VCM it has a write error and my friends car light flicker all his gauges go to zero and I thought we were f*cked. Then I made sure all my connections were tight, shutdown/restart the editor and still same problem write error. So for about 15-20 my friends car was toast. Then I said well let me try the “Write Entire” When I did that is took about 4-5 mins but it successfully reprogrammed the VCM and we test drove it and it was fine. Ohh yea I am using the latest Final Release 2.14. I just want to inform everyone about that issue. if anymore info is needed i will be happy to provide it.

Thanks

[Nightridercobaltss]

Any one wanna chime in to why i cant just to the Write Calibration Only ?

[Chris@HPTuners]

Any one wanna chime in to why i cant just to the Write Calibration Only ?

there is an inconsistent ECM hardware glitch with the write calibration. only a few % of E67's see this problem and we can't exactly nail down why. We are working on a solution but for now write entire needs to be used in these cases.

Chris...

[Nightridercobaltss]

there is an inconsistent ECM hardware glitch with the write calibration. only a few % of E67's see this problem and we can't exactly nail down why. We are working on a solution but for now write entire needs to be used in these cases.

Chris...

Thanks Chris your the best !!!!

[panblackrose]

Good, I'm glad to know I'm one of the few. How many times is the vcm capable of being rewritten? Currently, it's only been changed once, but I want to go in and try to lower the VVT activation point as well as enrich the fuel delivery. I'm also currently searching for how PE mode works.

[Bill@HPTuners]

thousands if not millions of times.

[panblackrose]

Quick question, what is a reasonable price to get minor VE tuning done by a pro shop with HPT?

[EC_Tune]

Car Y/M/M?

[panblackrose]

2006 Chevy Cobalt SS 2.4L 5 spd.

[EC_Tune]

VE tuning on an 06 might be pretty pricey as they don't have a standard "VE" table anymore. Lots of constants that get added/multiplied/squared to get the final VE value. Plus you have intake and exhaust timing to deal with too that get added into that mix. Not fun...

Take a look in the V8 stickies -- Post about the E38/E67 ECM's.

[Bill@HPTuners]

But he's only looking for some "minor" ve tweaking doug lol

[EC_Tune]

To the VE constants ??!! hehehe

[jeanb]

thanks for the info guys - just had the problem with a 2007 cobalt 2.4

btw - for some reason the "service traction control" light came on

[jeanb]

p.s. - need to write entire everytime-