Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

Issue with Impalae idlign low rpm timing commanding

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Old Mar 17, 2005 | 11:13 AM
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Issue with Impalae idlign low rpm timing commanding

Having a problem with an Impala... it commands REAL low timing at idle and very low rpm sub 1300 (like 10-13 degrees) even when the closed throtttle spark advance table should command 30 to 40 degrees. DO you have any idea what this may be a result of? ive tried many flashed to the PCM, and believe the PCM was changed prior to all of this as well so SHOULDNT be a fubared PCM.
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