Hi - I am changing out my Z's fuel pump because near as I can tell it
is bad, it would supply my Quadrajet with no gas at all. When I pulled
the old pump off the push road dropped all the way down and I do not
know how to raise it again to get the pump finger back underneath it.
The autoparts store supplied me with a new pump, but I see it has only
two connections, not three. Is this the wrong pump? I am guessing the
missing connection is the return line to the tank?
Any and all help is appreciated
I just replaced my pump on my '85 305 Z-28. You may need to remove a plate
that was under the pump to completely remove the rod. Once you get it out,
put some grease on it to help hold it up in position while you replace the
new pump. I didn't have too hard a time with mine. I did have a hard time
removing that plate. it was stuck on hard. Anyway you should be able to just
push it back up unless it got cocked and jammed. You may should replace the
push rod too, while you have it apart?
Take the new pump back and get the right pump, take the old one with you.
Yep, it slid down and hit the plate, I had seen the plate there mounted
with 2 bolts , but was not going to tear down any farther until I had
advice and the correct pump.
When remounting that plate, does it need any sealer on the side mounted
to the block?
The pump has it's own gasket of course, should I seal that gasket too?
When I was 19, (I'm 38 now) I used some type of sealer that came in a
small container (with a indian head on it maybe?) I think the sealer
was brown, and thin.
Thanks for you help -
If I remember right I didn't use any extra sealer on the pump gasket. I
think I did use some of that gasket tacking spray to hold it on so it
wouldn't fall off while installing. I didn't replace the gasket on the block
but I probably should have. Lucky it doesn't leak I guess! If I was going to
do it again I would also replace the plate gasket. If yours doesn't have a
gasket, maybe you should use some gasket sealer on the plate/block side.
To get it back up I always used a paper clip bent to slid down under the
bottom of it and get it up until I could push it all the way back up. Then
as mentioned put a longer 3/8" bolt in the upper hole in the front of the
block (after you remove the short one) finger tight just enough to hold it
in place and don't forget to take it back out and reinstall original with
some kind of sealer on it when done.
Yeah, that's how my Haynes manual said to do it. Anyway I had to remove the
plate for mine since I was replacing the rod too while I was there. Instead
of the bolt I just added a little grease to hold the rod up in position. The
bolt would probably be better to make sure it doesn't slide down though. As
usual I was looking for less bolt turning in the tight spots with headers,
so for me the grease was easier.
OK the pushrod and new pump are connected, I still have no gas. I have
the line disconnected from the carb and it's pushing no fuel.
Anybody have a theory besides the possible obvious - a plugged line.
No sign of any fuel under the car, no sign of any fuel being drawn.
First, the obvious... is there gas in the tank?
second, car is 29 years old replace ALL the rubber line in the system.
There is usually a peice at the top of the tank to connect to the
steel line. and there are peices at the frame rail mounted fuel filter
if they had one in 1979. And replace the peice from frame rail to
pump. There is a strainer sock inside the tank, that might be
Water froze in line? it's 4 deg F where I am.
On 23 Jan 2007 19:22:17 -0800, email@example.com wrote:
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Replacing all the rubber is what I did originally, it was a obvious
Since then I have disconnected the pump from the tank and ran a line
from it into a gas can. It still will not emit gas, so the trouble is
not in the tank at this point.
Dumb question but does it run if you put gas in the carb ? Just making sure
it does run and didn't lose a timing chain completely. As long as the cam is
turning and the lobe is not wiped out on the fuel pump lobe on the cam,
there is almost no explanation of why it won't pump from a can. Not being
smart but are you sure you are hooked to the inlet on the pump ? Also are
you sure the rod didn't drop back down and the pump went on anyway ? Did you
do the bolt from the front method to reinstall ? if so did you take the long
one back out ? if not maybe that is holding the rod in the fully extended
The pump rod could be stuck, due to dirt or varnish. The pump you
bought could be defective. The cam lobe could be worn off. Pull the
pump back off, then pull off the cover plate. Check for free movement
of the rod. Turn over the engine, by hand to be safe, and see how
much travel the rod has. I forget what it should be , someone know
With the pump off, work the lever by hand and feel for suction at the
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