New! TSB#06-06-04-039 Fluctuating Unstable Idle - Reprogram ECM

[my_bd]

Aug.10, 2006
2004-2006 Ion Redline
2005-2006 Cobalt SS/SC

http://www.alldata.com/tsb/General-M...039/40391.html

[TheWastedYears]

Apparently, the new flash didn't fix it.

[fullthrottle]

Originally Posted by TheWastedYears

Apparently, the new flash didn't fix it.

appaerntly but fullthrottle fixed it.

[mgm1979]

ok, so we've seen things LIKE this...is this the REAL thing this time? WOP? I wanna know if I go to Saturn, if they're gonna know what I'm talkin' about this time...

[Ziggi]

i definitely get this on my 06 that's about 3 weeks old... might have to ask the dealer about it. thanks

[crazybrew609]

i got the first flash and today my car finally did it again but it was one for a half second and it quickly went back to normal... i'll get this one too just for shits and giggles

[sheek360]

Originally Posted by mgm1979

ok, so we've seen things LIKE this...is this the REAL thing this time? WOP? I wanna know if I go to Saturn, if they're gonna know what I'm talkin' about this time...

the last flash fixed my ac rpm fluctuation. But my rpms in idle is still shakey, but not by much. Like MGM said, if this is the real deal then I guess Ill get it fixed at the dealer, if not then forget it.

[NoRemorse]

There was a thread started recently where I said how to fix this with HPT. I'll post it here in a second.

This 'reflash' didn't do anything on my car.

Plus, this update won't work on staged cars.


here is my solution:

Originally Posted by NoRemorse

Find someone with HPT, and have them:

A) Set a minimum injector pulse width of 0.4ms and use the 'small pulse adder' table to smooth this out from 0.4 to 2.0ms. This will keep the car from ever stalling, while letting it control the AFRs nicly.

B) Decrease the adavtive idle spark advance (both over and under spin) by 30%. This stops the car from 'overshooting' the desired idle RPM by making it react a bit slower.


My car has WAY bigger injectors than the stage kit does, so the problem was amplified in my car, often even stalling completly. These chages made my car idle smoother then it EVER has. I can't even make it stall! I FORCE it to try to idle at 400rpm (using HPT) and it still won't crap out, where it would have stock.

[korax123]

GM stage kit raises the Idle speed from 750 to 850rpms for some reason.

[smokem10]

if we go to the dealer to get this tsb done, will they erase my Spooner tune???