2.4L LE5 Performance Tech 16 valve 171 hp EcoTec with 163 lb-ft of torque

infamous high idle after throttle clean possible fix

Old 12-24-2018, 07:37 PM
  #26  
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Junk yard. As long as you get a 2.4L TB.
How long did you disconnect the battery and did you power cycle?
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Old 12-24-2018, 07:41 PM
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I left the batt disconnected for about an hour. What do you mean power cycle?
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Old 12-24-2018, 07:48 PM
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With the battery disconnected, you put your key into the on position and leave it for 5 minutes. Then off for 30 seconds and repeat 3x.
I've seen this on other forums (including another cobalt forum) and some people reported success. Think of it like resetting a router/modem. You are essentially resetting the computer in your car. What this does is clears the remaining electricity in the capacitors and relays and thus no energy, no memory.

I would call another mechanic and ask if they have a Tach 2 machine that has idle relearn capabilities as a backup plan.
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Old 12-24-2018, 08:14 PM
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Do you have to completely unhook the batt? Im not around tools atm all I have is a set of pliers. I got the neg. Loose but cant get the positive off lol
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Old 12-24-2018, 08:18 PM
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I know I sound like a tard but im visiting family for xmas and didnt bring tools so you helping is a last minute thing lol
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Old 03-15-2019, 09:43 PM
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Exclamation

Originally Posted by Larrayjayy96 View Post
I know I sound like a tard but im visiting family for xmas and didnt bring tools so you helping is a last minute thing lol
Did you ever figure out a fix ?
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