Map vacuum line?

[MDDYATV]

Ok so I have my new bronco for about a month now and I am still tracing out vacuum lines. that the previos owner had disconnected. I have an 84 351w 2bbl. I have looked at the vacuum diagram and the map vacuum line is suppose to go to a manafold vacuum in the front of the engine, but I can not find where it goes. I have looked at the sticker on the hood and printed out a diagram from the internet but still cant find it. any input would be helpful

 

[Yardape]

You have a MAP sensor for a carburetor? Hmmm I didnt know that

 

[MDDYATV]

Ya I did not Think I had one either but here is a vacuum diagram its there.

 

[Seabronc]

View attachment 4362
Ya I did not Think I had one either but here is a vacuum diagram its there.

Where did you get that diagram? Is it the same as the one on your radiator support? Was the truck always in the area in which you live? Is the sensor located on the left fender behind the window washer reservoir? Do you have an altitude compensating carburetor?

As far as the vacuum trees go, there should be one behind the carb and one just in front of it toward the driver side. If the truck vacuum system has been messed with, the front one may have been removed. It is not important where you hook that line to as long as it is at main vacuum level, either at a port under the carb or on the rear vacuum tree.

Good luck,

>-

 

[MDDYATV]

That is the same Pic as on the Radiator support. The truck originally came from California. I live in Northern Nevada and no its located on the passenger side wheel well by the voltage regulator and battery

 

[MDDYATV]

what is an altitude compensating carburetor? how do I tell if I have one?