Inconsistent Idle Fixed....Come on In
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 1,218
Likes: 1
From: MD
Inconsistent Idle Fixed....Come on In
Hi All,
I tried the idle relearn to no avail. So I started checking the intake as I had read on previous posts that this could be caused by a Vacum Leak.
Sure enough one of the hose clamps on the Halltech Tric Intake had loosen up to the point that there was no longer a tight seal. so air was entering there as well. I re-positioned the seal and tightned down the
hose clamp. Did the relearn procedure again.
I am happy to report my C5 is back to being a beast.
Let the good times rolll.
I tried the idle relearn to no avail. So I started checking the intake as I had read on previous posts that this could be caused by a Vacum Leak.
Sure enough one of the hose clamps on the Halltech Tric Intake had loosen up to the point that there was no longer a tight seal. so air was entering there as well. I re-positioned the seal and tightned down the
hose clamp. Did the relearn procedure again.
I am happy to report my C5 is back to being a beast.
Let the good times rolll.
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 1,218
Likes: 1
From: MD
The car was idling between 700 and almost cutting off. It was very sluggish and down on power.
The problem was that I had a vacum leak in my intake because of a loose hose clamp that allowed the seal to leak.
The idle relearn procedure is:
Posted by Redshift 6-01
C5 Idle Relearn Procedure
Purpose
This page basically shows you step by step how to do an Idle Relearn. You would want to do this if you have done any intake modifications. If you do not do this, you may have hesitation or other issues.
Tools Required
None.
Do the Job
Follow these procedures EXACTLY or you will have to start from scratch.
Insert key into ignition and turn to the "On" position but, DO NOT START THE ENGINE.
Pop open the engine fuse block box cover and remove the two 10amp fuses from position numbers 16 & 23.
Your DIC will now display "check" messages for ABS, etc...
Turn ignition to the "Off" position.
Re-insert both 10amp fuses for positions 16 & 23.
Start your engine
Allow engine coolant temperature to reach a minimum of 176 degrees F and run at this minimum temperature for at least 5 minutes.
Shut down engine
Let rest for a minimum of 30 seconds.
Restart engine - check for DIC error codes (there should be none).
Drive car for a minimum of 30 miles at varying rpm settings and speeds. PCM will now re-learn and adjust for the new air flow and air temperature at the intake.
Cheers....
The problem was that I had a vacum leak in my intake because of a loose hose clamp that allowed the seal to leak.
The idle relearn procedure is:
Posted by Redshift 6-01
C5 Idle Relearn Procedure
Purpose
This page basically shows you step by step how to do an Idle Relearn. You would want to do this if you have done any intake modifications. If you do not do this, you may have hesitation or other issues.
Tools Required
None.
Do the Job
Follow these procedures EXACTLY or you will have to start from scratch.
Insert key into ignition and turn to the "On" position but, DO NOT START THE ENGINE.
Pop open the engine fuse block box cover and remove the two 10amp fuses from position numbers 16 & 23.
Your DIC will now display "check" messages for ABS, etc...
Turn ignition to the "Off" position.
Re-insert both 10amp fuses for positions 16 & 23.
Start your engine
Allow engine coolant temperature to reach a minimum of 176 degrees F and run at this minimum temperature for at least 5 minutes.
Shut down engine
Let rest for a minimum of 30 seconds.
Restart engine - check for DIC error codes (there should be none).
Drive car for a minimum of 30 miles at varying rpm settings and speeds. PCM will now re-learn and adjust for the new air flow and air temperature at the intake.
Cheers....
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 1,218
Likes: 1
From: MD
Yes the idle re-learn procedure just accelerates how quickly the PCM will learn how air flows into the engine and how to compensate and regulate engine speed. It will naturally occur over time even if you do not do the re-learn procedure.