fuel pump noise?
Thread Starter
Racer
Joined: Oct 2001
Posts: 279
Likes: 1
From: Stonewall N.C.
fuel pump noise?
After stethoscope analysis, the fuel pump seems to be making a ticking noise. Is this the pump or the rod doing this, in other words do I need to replace the pump or something else, of course I"ve already taken the pump off.
Burning Brakes
Joined: Jun 2002
Posts: 837
Likes: 3
From: Texas
Re: fuel pump noise? (vettedreams)
I just went through the same thing. The noise is probably coming from the pump. While holding the pump in your hand, put your thumb on the arm and try to move it. If you can get any movement at all this way then thats probably what you're hearing, caused by a weak return spring. I had about 1/8" of "weak spring travel" before it met resistence. Compare a new pump with the old one by pressing on the arm and see if you notice any difference. If you already have the old pushrod out, it probably wouldn't hurt to replace it but I really doubt thats the problem. just my opinion
Le Mans Master
Joined: Sep 2000
Posts: 5,635
Likes: 4
From: Orlando Floriduh
Re: fuel pump noise? (goinbroke)
My original pump was making a noise very similar to a lifter. The arm was all beat up... It actually had a step worn in it which accounts for the fact that my noise was intermittant.
[Modified by silvervetteman, 10:57 AM 2/23/2003]
[Modified by silvervetteman, 10:57 AM 2/23/2003]
Racer
Joined: Sep 2000
Posts: 355
Likes: 0
From: Valdosta Georgia
Re: fuel pump noise? (vettedreams)
Mine did that and when I removed it , Out fel two halves of the spring into my hand. Much quiter after replacement. Hershey :chevy
[Modified by Hershey, 3:52 PM 2/23/2003]
[Modified by Hershey, 3:52 PM 2/23/2003]
Instructor
Joined: May 1999
Posts: 222
Likes: 0
From: Albany N.Y.
Re: fuel pump noise? (vettedreams)
I to have this problem. The pump ticks after it warms up. I thought it was a lifter, but it comes from the pump. I have to replace mine in the spring. This was suppose to be a new pump but, when I put it in the arm did not have a lot of resistance to it. :mad
Burning Brakes
Joined: Jun 2002
Posts: 837
Likes: 3
From: Texas
Re: fuel pump noise? (Tom77)
To follow up on my earlier response....and again just my opinion. I think many of us could hear fuel pump clicks if we listened very closely. When the arm is pushed in by the pushrod then back out by the spring tension there is a good possibility that a click could be heard when the arm hits it's max travel out. Before installation, I did some very precice measuring of the distance from the mounting face and the outer most distance of the arm on the new and old pumps. I found the old pump to be about to be about .060" shorter in length. This could, I suspect, create a situation like a valve lifter adjusted too loose. Too much clearance and you get a "click". Why the difference in the two pumps I'm not sure ..... different makers maybe. As far as the amount of spring tension Tom77....I had to put the pump arm against the workbench and really lean on it to move it. Pretty stout spring!
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