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actually, being a long night last night we just over-looked the P0101 issue in closed loop.

We're having the same issue. No matter what values are places in PE enable MAP, rpm delays or tps, we always command 14.7 and PE is never enabled.

oh, i've set the delays to 0 and the PE enable map to different values, 22, 55, 90, 100

We're faking a 2.5bar map, but unable to go into PE.

From closed loop we stall out, from open loop it runs great to redline but never enters PE. Suggestions?

You cant tune the VVT specificly yet



Look at this as any other car, tune your maf, torque management, spark and PE. Theres tons of info in the stickys and other threads on how to do these...

fyi: 12whp has been documented from vector on the cobalt 2.4ss forums...

I understand what you mean, but this is predictable, not random. Its not a huge deal, since i can still "write entire" and tune. However, if im able to flash normally with .12, and the error appears...

based on this, i should be able to "write entire", fix the issue, then "write calibration only", correct? This doesnt work...

foff667: thats a good idea, however this is a work laptop and cant...

can i have a link to 2.1.12 so that i can see if it is in fact an issue with the version or something wrong with my car. up to the point of this issue, i was updating my car almost daily with 2.1.12,...

calibration only writes continue to error.

entire writes are the only ones that work. i think its safe to assume this is 100% a 2.1.14 issue.

Interesting, so writing the entire thing was the fix last night. So I'll try it again tonight and see what happens. Thanks Keith.

Well, to be honest im a little chicken to try to upload again, all those times my old lady has told me to "stop messing with it" has finally gotten through to me when my car wouldnt start :banghead: ...

reinstalling is what i wanted to do, but i couldnt download the old version anymore.

Oddly enough, joe's advice worked! Thanks!

However, how do i revert back to 2.1.12? Does anyone has a link...

things i've done so far:

1st - reinstalled 2.1.14
2nd - rebooted
3rd - reinstalled .net 1.1

nothing is working. If anyone happens to have 2.1.12 I'd REALLY love a link right now..

2006 2.4L cobalt, partical

I just upgraded, came out of work and thought i'd flash a new tune and after the "erase" part of the flash it errors.

the result: "write was terminated prematurely".

now my car wont start....

cool. post your tune!

knock retard doesnt always mean knock. Look into disabling your M6 smoothing.

Start by reading about the following things listed here: http://www.cobaltss.net/forums/showthread.php?t=26322

Once you've got a plan of the things you want to attack first, then return to the...

calibrating maf, tuning spark, increasing dwell picked me up 2-3mpg at 80mph.

make sure your not going into PE because your pe enable numbers are too low. also, pistion protection and cot add...

I didnt think spark effected vvt anymore then a non-vvt. my understand is vvt is mechanically controled via oil pressure. there might be some code in the os for it, but its not unlocked in hptuners...

When you hit the histrogram's "+" (max in that area) if it doesnt show anything then theres no knock in that log. Alot of times you'll need a good load to see knock if your too high, make sure to...

sorry, it was a long night... heres my hpt file

under engine>airflow there no "primary VE table" for the 2.4L cobalt ss, only cranking ve.

Also under the scanner the LTFT/STFT histograms will not load, tho i can replay them from the log and...