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questions, 4.3 tbi

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Old Jun 27, 2001 | 05:31 PM
  #1  
zippy's Avatar
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From: Chander, Arizona USA
Car: 2006 Silverado 1500
Engine: 5.3L
Transmission: 4L60E
questions, 4.3 tbi

new to chip programming. problem is a 4.3 with an searching idle due to what seems too low of vacuum at the 550 programmed factory idle. i haven't found any info on editing this chip. i'd like to edit the chip or copy a 1303 edelbrock chip (factory is amrw). not even sure what the chip type is. i was guessing 2732a, but i don't believe that to be right. any help here would be great.
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Old Jun 27, 2001 | 05:37 PM
  #2  
Grumpy's Avatar
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From: In reality
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Transmission: Janis Tranny Yank Converter
<font face="Verdana, Arial" size="2">Originally posted by zippy:
new to chip programming. problem is a 4.3 with an searching idle due to what seems too low of vacuum at the 550 programmed factory idle. i haven't found any info on editing this chip. i'd like to edit the chip or copy a 1303 edelbrock chip (factory is amrw). not even sure what the chip type is. i was guessing 2732a, but i don't believe that to be right. any help here would be great. </font>
OK, I looked at my crystal ball, and still can't see what you're working on. 4.3 what?. What ecm?.

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Old Jun 27, 2001 | 06:22 PM
  #3  
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From: Chander, Arizona USA
Car: 2006 Silverado 1500
Engine: 5.3L
Transmission: 4L60E
i just noticed i did forget to mention it was a tbi. ecm number is 1228062.
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Old Jun 27, 2001 | 07:36 PM
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The "062" uses the $4E eprom. Tunercat DOES have a TDF for that eprom, though I do not know how good.

On the idle problem, I found playing with my IAC step counts helped to get it to a stable idle. I just noticed what my IAC Count # was when my idle "stabilized" and then set the Idle Speed Step Count vs Coolant Temp. It helped a lot to get a nice stable idle.
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