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Discussion Starter #1
What is the black, top-hat shaped thing on the back top of the UIM? It turns, but what does it adjust? I'd take a pic, but if you know what it is, then you probably know right away what I'm talking about.

Thanks,

Massiv.
 

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T3/T4 60-1
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if it's what i think it is... it doesn't adjust anything..... although it would turn freely on it's base..... that unit is the EGR vacuum solenoid... essentially when the computer wants to open the EGR, it sends a signal to this device, which allows vaccum from the UIM to work on the actual EGR thus allowing the exhaust gases to enter the intake stream
 

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Discussion Starter #3
Yeah... it turns freely and looks like it adjusts things. EGR Vacuum solenoid eh? Alright... I wondered what I was "adjusting" if I turned it one way or the other! haha... Apparently nothing!

Thanks,

Massiv.
 
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