I removed my fuel pump today and cleaned up all the mounting hardware in order to replace it along with with some new fuel hose. I've done this a few times on other z cars over the past decades. However, I've never replaced the fuel damper. I have removed dampers on at least two cars in the past with no ill effect. Can a fuel damper go bad? I suspect a damper doesn't have moving parts and it's there to prevent pulsations in the fuel delivery. My damper looks bad on the outside but it's canister is in solid condition. I doubt I could find a new OEM one if I wanted one. What could go bad with an OEM damper?

What’s the problem you’re having?

I'm replacing the pump because of low fuel pressure. Looked like nothing back there had been touched since new. So that was the only problem. I alway suffer with the "while I'm at it" thing when I work on my cars.

My Dad always preached to not put old parts you can afford to replace back on the car.

Lots of exceptions to that statement but you all know what I'm saying.

Strange Fuel Pressure

I finished replacing my fuel pump today along with all the rubber fuel lines at the pump except the one that goes to the tank. In addition I replaced the fuel filter and all the rubber fuel lines going in and out of the filter. Started it up and still have low fuel pressure. My gauge reads about 26 lbs and doesen't move with higher rpms. However, when I disconnect the vac. hose to the regulator I get about 38 lbs at adle with no real change at higher rpms. I replaced that regulator along with a bunch of vac. hose about two years ago (2000 miles) because the old regulator was really rusted and the smaller vac. lines were in rough shape. Do I have a bad regulator? Any ideas?

10 minutes ago, mayolives said:

doesen't move with higher rpms

Try snapping the throttle open and see what pressure does. It's not RPM that causes change it's manifold pressure. If you just ease the throttle open intake vacuum/pressure won't change much. The numbers look good, actually very good, 26 psi indicates very good intake system vacuum.