Yea...lol. I never can capture it on ae because it never happens when I have time to set it up. Always when I'm going to work or school or somewhere in a rush...

 

Josh , does the 03 have the IAT2 senser? why would maf burn ? more current or it got wet ,so if IAT2 was malfunc would one or the other take the default ( take the heat ,current)? results being surge.

 

Yes it does have an IAT2.

Not sure why the MAF connector would burn like that. Maybe moisture? Looks like a flash burn and not a charred condition.

The inferred EBP confuses things...

Josh

 

Does anybody have a wire diagram of the 4 burnt slots? what and where do they go?

 

Josh

 

Miles and Josh, try the IAT2 senser and connection we know that thing will be sooted up but what concerns me is Ground and even the iat2 connection it self look at the pic #3 is ground mostly burned then it went up. just brain storming , thanks Josh for the diagram

 

Miles after reading alittle ,I would go for the IAT1 that's in with the MAF, in the tech folders under Iat1 and Iat2, makes sence now that I see the connection burned, it also regulates timing and fuel.

 

I had to replace the MAF pigtail (MY 05), it idled horribly, especially when cold, and surged (maybe stumbled is a better word for it) when putting it into gear, or when taking off. Mine was not burned, so I'm not much help there, but I believe you are on the right track.

 

Looks like you found the Problem

That pigtail and or Harness

03 Uses that MAF for Turbo output

I would Unwrap that MAF from sensor to the PCM and Also check with a DVM

 

what the results? from maf and connection?

 

So i got plenty of great info here, but im not quite sure where to start... what do i want to check with my meter on the maf harness? make sure its not shorted? would that not throw some sort of code? I just find this weird since its only after the engine gets heat soaked apparantely

 

MAF values
koeo-0
low-1.44 volts
high-2.65 volts
operating values-0.5-4.75 volts

IAT1
koeo-98.6
low-98.6
high-98.6
operating values- -40-250

 

Thanks, i will keep that in my phone and try to bring AE with me tomorrow

 

And where is the IAT2? Is that in the intake manifold?

 

Yes right behind upper fuel bowl