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Cadillac 1993 Deville 4.9, 1991 Eldorado Touring Coupe
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370 Posts
Discussion Starter #1
Wondering if there is ..... and ...... if i have to do an idle learn procedure or will ECM relearn after driving the car a bit more... I have a high idle and high revs on startup after battery died and left E52 ECM Memory reset code.
 

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2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
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26,323 Posts
There is a procedure, but it's not necessary. It'll learn quickly on its own.

Can't remember it exactly ATM. I want to say run it for a set amount of time in idle with all accessories off, but I'm just not sure.
 

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Cadillac 1993 Deville 4.9, 1991 Eldorado Touring Coupe
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370 Posts
Discussion Starter #6
I`ll just take her out for a long drive today and see what happens.... Good enough weather expected today. Thx though.
 

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Cadillac 1993 Deville 4.9, 1991 Eldorado Touring Coupe
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370 Posts
Discussion Starter #7
I found this online, Seems to be inline with what you were suggesting MC . If i dont get a chance to get out for a long ride today, I `ll try it

The TP sensor/IDLE LEARN should be preformed when-

TP is replaced

throttle body replaced

PCM replaced

battery disconnected or replaced

PCM code 52

IAC adjusted

TP sensor adjustment has been preformed
min idle speed adjust procedure has been preformed

IDLE LEARN PROCEDURE ***4.9L***
1-outside temp is 50 degrees or greater
2-start engine and idle 13 min
3-at end of 13 min- enter diagnostics (engine running)
4-turn engine off
5-wait min of 20 sec
6-turn ign on (engine off)
7-enter diagnostics
8-turn ign off
9-wait min of 20 seconds
10-turn ign on (engine off)
11-enter diagnostics
12-turn ign off
13-wait min of 20 seconds
14-start engine
15- appy brakes and shift into 'drive'
16- turn the ccp 'off' and allow engine yo idle 1 minute
17- turn the ccp to 'auto' make sure AC comp engages- idle for 1
minute
18- put car in park and turn ign off
 
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