What are the two sensors in the water neck? I had the engine rebuilt and they did not give me my old intake back. I think one is the coolent temp sensor for the ECM. What is the one with the two vacum? lines running to it? Also I got a new coolent temp sensor but it doesn't fit the hole in the new water neck even though it looks just like the original.

 

You're right, the one is the CTS for the ECM. The mystery one is the temp vacuum switch for the EGR. IIRC both of them should be 3/8" pipe which is a little bit of an unusual size.

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"So many Mustangs, so little time..."
ICON Motorsports

 

Hm... If they are both the same size I got the wrong water neck then. one hole is bigger.. I thought that might be the case..

Thanks