8

As long as you have Tuned Port Injection (TPI), the Schrader valve is located at the back of the fuel rail on the passenger side (near the distributor). You have to use a 90° elbow in order to attach it, because the upper plenum sits right over the top of it. If your engine is carb'd, you'll not have one. EDIT: Here is a little broader picture of my own ...


4

So I went out today and ran the fuel pump for a few seconds with the return line clamped off and saw that the amperage draw went up to 5.85 amps and the sound of flowing fuel stopped. At first I just figured the fuel pressure regulator must be stuck open / bad and that's why I'm seeing a jump in amperage from the 4.3 amps I was seeing ( which I also saw at ...


3

This will all depend on the type of fuel pump that your vehicle uses. The stronger the pump, the larger the pressure difference it can manage. If you wanted to calculate a theoretical limit, I guess you could estimate it by calculating the fluid power based on the flow rate your engine requires and the pressure upstream of the fuel filter: Power = Pressure *...


3

Realistically I'd redo your test using a little more accurate of a timing sequence. Two things to really make it more accurate: Use some sort of stopwatch (apps for cell phones are free). Doing so will ensure you are getting the time you are looking towards. Right now you are guessing you are using the exact same time. Human nature tells me we cannot get ...


2

Sounds like your pressure fuel pump is 100%. Pressure regulator could be off. If your above 30psi after 5 mins you are probably OK. The pressure regulator works by bleeding pressure back to the tank. It sounds like it could be sticking a bit. At full throttle it probably closes all the way. I suspect at idle it should open to its max. Maybe just ...


2

There are two values for the pressure since the maximum pressure is achieved at low or zero flow when the engine is not running and the other when the engine is consuming fuel. It is possible that the pump can deliver maximum pressure at zero flow, but not be capable of supplying fuel at the rate that the engine is using it at the required pressure - 30 to ...


2

In most cars, the fuel system should hold the pressure for quite a while. You shouldn't see a significant drop in fuel pressure after engine/pump shut off. What you are probably experiencing here is leak back at the pump. There should be a check ball or some means to prevent fuel from flowing back through the pump after it's shut off. This ensures fuel ...


1

Earlier diesels had separate high pressure pipes to each injector and injectors still failed. The conditions injectors have to work in and what has to be achieved (in terms of spray pattern and spray duration) require them to need servicing / replacement eventually. Some components will fail early - you don’t mention mileage but some cars can need injectors ...


1

I decided to buy a new fuel filter, and measure after the old filter, and before and after the new filter. I let it idle two minutes before taking each reading. After the old filter, which had been in there for ages, it read 35 psi. Before and after the new filter were both also 35 psi, although the needle on the prefilter reading was jittering a little ...


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