Vacuum line question
I have included a photo of a vacuum secondary or advance that isn't connected on my 93 xl 4.9. It is directly in the center of the picture it had a small section of vacuum hose that went nowhere. I need to know where it goes and if it's needed. Someone told me it was for automatic transmission vehicles. I have a 5 speed. Thanks
That nipple is the air pump diverter valve I think. It shouldn't have to do with transmission, it's for emissions. On my 96 4.9L it's a tan/cream line. The other end of it is on the rear drivers side of the block, where there's like 6 lines all close to eachother. It should be on the vacuum diagram on your hood too.

