Fuel delivery on 91 Honda Civic

[Ron Bradley]

I saw your video on checking fuel pressure on a Honda Civic. I have a 91 si. The car ran great one moment and
then would not start the next. It appeared the fuel pump was not putting out, so I changed it. I also changed
the relay and the fuel filter. I am getting spark. In fact is will run for a few seconds on starting fluid. When I
check pressure as shown in your video there is plenty. A question I have here is, if I turn off the key and try
it again–leaving the screw open or even off, there is less and less pressure until no fuel will come out. I
am assuming this is normal—but is it??

What does not seem to be happening is for the fuel to actually get to the plugs. I thought maybe it was the
fuel pressure regulator, but I tried one from my 93 civic and it didn’t make it any better.

My only thought is that it is losing fuel pressure somewhere along the line. I don’t have an adapter for my
gauge to fit the filter threads.

What do you suggest now?:'(

Thank you for your help.

Topic

[Bubba]

How much fuel pressure do you have?
Where are you checking pressure?
Any codes? (Google how if you dont know)
When did this start? After doing other work or left you on side of road?

[Ron Bradley]

Not sure about exact pressure, but when I turned key I heard 2+ second go prime. Then got A very healthy shot of fuel out of the filter. No codes. One minute running great. Next start it cranked but no start.

[Bubba]

You will get more help with numbers because that is what people working on cars know. Low pressure will tend to be something then high pressure something else.

[Author]

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