I think I have a blockage.

[GregElliott]

In fact, I know I have a blockage.

1991 4cyl 3SFE; SV21; autotrans

It is in one of the lines in the fuel pump bracket assembly.
I think it might be a return line but I'm not quite sure; I was hoping one of you could tell me.
I cleaned up my bracket assembly after it has been sitting for a couple years.. so there was all kinds of goo all over it. This line I'm speaking of was all gooed up as well. Using good ol' lung power, I tried blowing through the line from the opposite side of where I suspect it is blocked. No luck.
I am wondering if there may be some sort of valve inside the line that I need to be aware of because my next step is going to be blowing the line out with my air compressor. That so, how much air pressure (PSI) should I use? (I don't want to damage the line).

Here is the line I'm talking about... I'd appreciate the help guys, thanks

[TBayToyotaBoy]

Greg, the line you have indicated is, in fact, the return line. There is no valve that I'm aware of, especially considering that the line is under very low pressure--a valve would only raise the pressure in a line that's not designed for high PSI.

-Tim

[Doctor J]

You can use up to 30 psi of air;
the line with clamp-on fittings is return line; one time we have had customer with 84 camry . The nylon strainer valve on the pump discharge side fell apart and clogged the PRESSURE line.

[GregElliott]

Okay, I'll try that...
what is 30 isn't enough to unplug it?

[TBayToyotaBoy]

Originally Posted by GregElliott

Okay, I'll try that...
what is 30 isn't enough to unplug it?

I suppose you could try sitting the sending unit so that the opening is facing up, and pour a small amount of Seafoam into there...wait a few hours or even a day and see if it's dissolved the blockage.

However, if corrosion is the culprit then you'll have to replace the line or the whole assembly.