LT1/LT4 Tech 1993-1997

PCM Tune

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Old Apr 16, 2012 | 12:06 AM
  #1  
numskull223's Avatar
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Default PCM Tune

Hey all, Ive been driving my car alittle since I put a tag on it. At WOT is unreal....Lets just say I thought I was going into the ditch when I hit 5th....nice set of pos....But after its warmed up and ran for a bit, it will go dead at a stop sign, and then it acts like the timing is high or low during the cranking(turning over stop turn over stop) If ya know what I mean but it will fire up.

So I was thinking, If this car set for over a year with no battery will the PCM lose its tune? Kinda like a destop if the mobo battery goes dead?
 
Old Apr 16, 2012 | 12:42 AM
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craby's Avatar
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some condensation may have formed up in there and is making havoc. tune could have went wack/bad. opti may have some unwanted crud growth in there and is just not happy and is quitting, ignition modual may be acting up, coil may be old and tired and just cant go that long any more.
 
Old Apr 16, 2012 | 02:14 AM
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numskull223's Avatar
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Originally Posted by craby
some condensation may have formed up in there and is making havoc. tune could have went wack/bad. opti may have some unwanted crud growth in there and is just not happy and is quitting, ignition modual may be acting up, coil may be old and tired and just cant go that long any more.
I guess i shoulda mention its still flooding, seems to be even more now.
 
Old Apr 16, 2012 | 06:35 AM
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highly unlikely about the tune because it is stored even with the battery disconnected.

you are looking at opti ,sensor, icm, coil or fuel.

you need to diagnose but doubtful it's fuel since it runs well cold unless your pump is overheating
 
Old Apr 16, 2012 | 10:31 AM
  #5  
numskull223's Avatar
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Originally Posted by torque_is_good
highly unlikely about the tune because it is stored even with the battery disconnected.

you are looking at opti ,sensor, icm, coil or fuel.

you need to diagnose but doubtf
ul it's fuel since it runs well cold unless your pump is overheating
well i have found out that my long term cell isnt right. one cell is at 107 and the other one is at 137 instead of being at 128...bad thing is i dont know.whay to adjust to fix that. bad o2 sensor on the pne side maybe?
how much timing should it have in closed loop during cranking? its set to 0.0.
 
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