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2004 chevy trailblazer_ls_ext
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9 Posts
Discussion Starter · #1 ·
Recieved my PCMforless tuned PCM yesterday and installed last night and performed successful security relearn. Test drove fine except now the idle almost stalls everytime the compressor of the AC kicks in. RPMs drop to almost 2500, then back up to 5000. Thoughts?:confused:
 

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2003 chevy trailblazer_ls
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525 Posts
Did you have this issue before the tune, if so check and clean your throttle body with the battery disconnected for approx 20 mins. If you did not have this issue then maybe you need a case relearn from the dealership. :m2:
 

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2002 chevy trailblazer_ltz
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790 Posts
You need to clean your throttle body. Your old PCM learned to work with the dirtiness, the new one wasn't planning on it being so dirty. Clean it and you should be back to normal.
 

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2004 chevy trailblazer_ls_ext
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Discussion Starter · #6 ·
Thank for the thread on the TB. Will give that a shot later today. I will still need the CASE relearn as instructed by PCMforless because of the new PCM. Will let you know the outcome.
 
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