Quote Originally Posted by 1project2many View Post
Wow. Is this an OEM sensor? Old part or new?
OEM. Original to the truck AFAIK so 27 years old.

Quote Originally Posted by In-Tech View Post
I have not cut open a map sensor, but some of the oem controllers, mefi for example, have a jelly like conformal heat coating inside. Weird stuff.
I've seen similar stuff of varying viscosity, this stuff was very loose and wobbly though.


Quote Originally Posted by mecanicus View Post
Inside of this map sensor looks quite normal.The fault was here
This is how it looked when I opened it up. I think the stuff got so soft it flowed down into the vavcuum port like I mentioned and seemed to plug it up.

Sometimes this MAP would work, other times it would randomly lock in the middle of the voltage range and KPA on the scanner.