^^^^

 

Idle relearn is a procedure that allows the PCM to recalibrate air/fuel ratios. This procedure may be requried after changing an air intake, MAF, porting a throttle body etc.
It should norrmally not be required if no changes have been made One exception.. . ( there may be others) If you have recently changed from an alcohol free to an alcohol containing gasoline, you will have leaned out your air/fule mixture.

Idle Learn Procedure

Automatic Transmission
Perform the following procedure in order to return the learned idle to the correct position:

1] Turn OFF the ignition.
2] Restore the PCM battery feed (if disconnected).
3] Turn OFF the A/C controls.
4] Set the parking brake, and block the drive wheels.
5] Start the engine.
6] Ensure that the engine coolant temperature is more than 80°C (176°F).
7] Shift the transmission into Drive.
8] Allow the engine to idle for 5 minutes.
9] Shift the transmission into Park.
10] Allow the engine to idle for 5 minutes.
11] Turn OFF the engine for 30 seconds.

Manual Transmission
Perform the following procedure in order to return the learned idle to the correct position:

1] Turn OFF the ignition.
2] Restore the PCM battery feed.
3] Turn OFF the A/C controls.
4] Set the parking brake, and block the drive wheels.
5] Place the transmission in Neutral.
6] Start the engine.
7] Ensure that the engine coolant temperature is more than 80°C (176°F).
8] Allow the engine to idle for 5 minutes.
9] Turn OFF the engine for 30 seconds.

The A/C compressor kicking in and out at idle speeds puts a high load on the engine at those rpms and will affect idle speeds on most Vettes... Some with modified cams have a very rough idle and may stall with the A/C on at idle...

To complete the PCM relearn...

Restart the engine and check for DIC error codes (there should be none).
10 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 temperature at the intake.
a) If error codes persist, repeat steps 1-7. Make sure fuses are properly inserted before repeating steps.
b) Do not deviate from the sequence outlined above. If you do, restart the sequence from scratch.
c) Steps 1-4 are also necessary if you ever disconnect your battery or lose power for any reason.

 

Ok.maybe Im missing something...but if you turn the ignition off...how can you be certain that you've turned the AC off...could you before you start your sequence...jst make sure that your AC is off?

I nkow..Im an idiot...but I had to ask

 

Just take the car out for the 30 mile drive and it will learn the new operating conditions without going through all the baloney.

Bill

 

 

LOL! The procedure cracks me up. Are we overlooking something here?

 

LOL. I was like whoa wtf!! I agree w/ above, just drive the car for 30 mins around town and on the highway and your car will re-learn the idle fine. I've disconnected my battery probably 20 times w/o letting the car idle for 20 minutes before driving....0 codes. Even after vararam.

DZ

 

Ever have a guy in your class room that wore thick glasses and had 5 pens in his pocket

 

im having problems with mine i just installed by ported TB and i had to use my old tps from my original TB and i accidently broke it during the swap sooooo i got a new one in and finished the swap and now i get reduced engine power etc on my DIc and the car just starts to shake when i go over like 3k i think also if i dont move the car it idles just fine it doesnt go into reduced engine power mode until i rev it up or drive a few feet... please someone helppppppppp

 

When I was getting mine tuner last week, After a download of a new tune, it would act like this too. All I did was shut it down, then restart it again. Most of the time, the second startup would be good. Once, I had to restart it three times to get it to run right. Very strange stuf...

 

i went in and just erased the codes and now it works im in awwwwwwww i dont get it but it works

 

ok now it doesnt work it keeps throwing the code when i drive and i can clear it while i drive but it turns right back on in seconds and throws me in reduce engine mode