Originally Posted by Hansm14
My book shows the filter attached to the frame,under the box.However it says to de -pressureize the system first. Should,nt just unbolt it and disconnect it.
Yeah, there is confusion about them.
I did a fuel pump not that long ago on a customer's '94. It did not have a frame mounted filter.
If you look at the factory parts manual in the faq section of the site, it will show you the location and part number of the filter.
The frame mounted ones were used on the 4cyl in 1994. They were also used on 93 and older.
Most non oem service manuals show multiple years, without making allowance for model changes.
It is possible that your truck was built in the month when the models changed over. Many times you see the same year built with 2 different parts., depending on exact month built.
Easy way to check... look at the driver side frame near the fuel tank and see if a filter is there.
If it's there, you just saved a pile of time.
In most cases, It doesn't makes a difference if you bleed the system through a schrader valve with a rag or slowly undo a hose clamp with a rag over it. Either method sprays fuel out, and releases the pressure.
The problem is, modern systems use fuel line "clips" that make it hard to remove them if there is any pressure in the line. This is especially true if you don't have a fuel fitting release tool.
DukeBomB's method is the "right" way to do it. All depends on your tools and what you are used to.
The earlier trucks with the frame mounted filter didn't use clips, so they're simple. If it's frame mounted, you should get some new rubber fuel injection hose and fuel injection clamps in addition to the filter. Don't use simple gear clamps like you see on radiator hoses.
Good luck !