caddillac esky issue

hey guys ,my wife let the battery in the esky die .ive had this issue b4 and it got alittle better and drivable till now.anyway it went dead lastnight and i jumped it this morning and it doesnt want to idle in gear now ,it sits at like 500 rpm were it should be closer to 700 and when i accelerate and let off for a light or to stop it goes down to like 300 rpm or less sometimes stalls.ive tried relearning it by turning all the draws on and putting in gear etc.I need some suggestions my wife has to leave tommorrow on a long trip and id like it to be ok.Ive had it happen b4 and it took a few days to straighten out .weve been driving it since last time but the idle hasnt went back to perfect,but never goes under 500rpm.that would be ok for now ,i think its some kinda relearn process i just dont know what to do .thanks as always .

Do you have a K&N or other brand oiled air filter? It sounds like your MAF needs to be cleaned.

no i dont have a k&n .its got to do with the battery dying this morning .it does it everytime the battery dies and i have to jump it .it seems to have to relearn,but the computer says theyre isnt a factory relearn for it.

Is this vehicle 100% stock? What year and how many miles? I understand about the problem starting after the battery went dead. What I was getting at, IF you had a dirty MAF, was that the computer is trying to relearn how to idle with skewed MAF readings. That will cause a problem like you described, in my experience. Another vehicle that didn't want to relearn idle had one of the front O2 sensors that was going out, but not enough to throw a code.

yes its 100 % stock .its an 03,100k or so on it .i plugged it in today and the only thing he could find wrong was an evap code ,but im sure that was irrelavant.i suppose i could clean it quickly.

If you haven't cleaned it for a long time, it's probably dirty anyway. If you have a scanner, get a look at your O2 sensor readings while you're driving. the numbers should be going back and forth rapidly, on both sides. If you have one lazy sensor, that will also be a problem.

i did have it hooked up and tried out today,he said it was all good but i didnt have the software to get into dealer stuff so he couldnt reflash it or anything.help me out here guys my wife has to leave in the morning .it just needs to relearn somehow.i took the batt cables off for 15 mins ,that didnt work ,then i also tried cycling the key ,didnt work,reveed it in gear ,didnt work ,turned all accys on to draw ,didnt work. any other suggestions guys.thanks

Grrrrr

THIS IS :bsflag:

i finally just learned how to use these .lol.

Sounds like you need Nate to chime in.

whos nate?gass man?

Yea GasGuzzler

yeh i ve been kinda waiting to see wat he has to say

There is no idle relearn for that. Most likely it needs the TB bore and blade cleaned and the PCM program updated for stall or low idle. Common on normal mileage 03-06 DBW trucks.

Ooops.....or something else? :ugh2:

Lots of other stuff to check too but not related to battery.

thyan y does it only happen when the battery goes dead ,everytime,takes a week to relearn.i know theyre isnt a relearn cus we installed it on our diag equiptment.thats y i cant figure this out ,it does it everytime the battery dies.

Not sure.

well ,dont ask me why but cleaning the MAF and throttle body and blade ,worked .idk what it had to do with the battery dying but wth ,it worked.wow.

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Originally Posted by Ramsey

well ,dont ask me why but cleaning the MAF and throttle body and blade ,worked .idk what it had to do with the battery dying but wth ,it worked.wow.

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Glad to hear you got it worked out, Ramsey.

Before your battery had died, the pcm had "adapted" to running and idling correctly with the dirty MAF and throttle body. Basically, as everything gradually got dirtied up over a long period of time, the pcm was able to gradually make the slight adjustments along the way to keep everything running smoothly.

Then, your battery died. All of those "adaptations" that the pcm was using are now gone. It has to start all over again. If everything was nice & clean & happy, then everything would have been normal, and you would not notice anything different. But you had skewed MAF readings and a dirty throttle body, and it would probably take several days to relearn, as you already explained. :)

thanks ,i would have never thought of it.makes sense now that you explained it in my face.the weirdest thing ,ha.maybe thats whats wrong with my truck ,whenever i come to a stop after really gettin on it ,it wants to die.noone can figure it out.

Dude I wonder if thats the problem with my truck. Mine only has a problem when the battery dies as well! Imma try it when I do my cam swap! If you just fixed my truck Ill actualy owe you guys one. Even though I am kinda stealing your thread. My friends always blaimed the tune... I always blaimed it on a bad ecu. But it would make sense if that was the real problem being how well it runs after it relearns the "adaptations" it takes to run.

That's probably whats wrong with mine, why it dies when I come to a stop, dirty MAF. Now if I could just find where the MAF is I'd clean it. I don't have one! :laugh: Crappy amateur tuner is whats wrong with mine. I can put it in Neutral when I come to a stop and it does just fine.

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Originally Posted by Show&Go

Dude I wonder if thats the problem with my truck. Mine only has a problem when the battery dies as well! Imma try it when I do my cam swap! If you just fixed my truck Ill actualy owe you guys one. Even though I am kinda stealing your thread. My friends always blaimed the tune... I always blaimed it on a bad ecu. But it would make sense if that was the real problem being how well it runs after it relearns the "adaptations" it takes to run.

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Why wait? Do it before your cam swap. Should cost you less than $10, only take you about 1/2 an hour.

Its the answer for everything greg. Come on. Go buy one put it on your truck and clean it. Youll be set.
Seriously I dont think mine has EVER been cleaned. Nore the TB

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Originally Posted by AKlowriderZ71

Why wait? Do it before your cam swap. Should cost you less than $10, only take you about 1/2 an hour.

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I haft to swap my TB anyway when I do that cam swap. Imma put on a TBSS intake manifold when I do it. so ya know. Y not just do it all at one time. I usually make sure someone is around me that knows more then I do.... If you only knew how well I can screw something up that should of been simple you would understand.

Cool.

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Originally Posted by Show&Go

Its the answer for everything greg. Come on. Go buy one put it on your truck and clean it. Youll be set.
Seriously I dont think mine has EVER been cleaned. Nore the TB

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I've got one laying in my pile of spare/leftover parts. If I clean my MAF will my truck start idling better? :)

Seems that there's a comedian in every bunch. :LOL:

Good call ^^^

BTW, ECM/PCM failures are extremely rare after about 1995 when the OBDII came out. Used to be the cause of half of any problem. Not so much. Not to scare anyone but 75% of the ECM/PCM's I've replaced in the last 10 or so years were fried by a handheld.....LOL, most often the 2003 new architecture.

glad i dont have a handheld.

Thats good to know