rOt0rHeAd

How does the fuel pressure regulator work? Does it allow the system to build pressure then bleed off excess? Reason I ask is becuase I have fuel pressure out of the filter, then took the line off the back of the secodary rail and got pressure there, then put that line back on and did not get pressure out of the front of the secondary rail, where the regulator is. Is that how it is supposed to work? And another thing, should the fuel pump just keep on running if I have the test connector jumped? Then I removed the secondary rail and held my fingers over the two injector holes and could not blow through it. Is the regulator closed until it builds up pressure? So, I know I am getting spark, I did the compression test like on kevin landers site and got OK readings, I tested ECU driver outputs for the injectors, heard them clicking when I turned the CAS, and I have fuel pressure past the primary rail. Still no start. Please help.

SonicRaT

iTrader: (6)

It will only let fuel pass through it when it hits the set pressure (34-40, usually closer to 40), it won't bleed any little bit by until it hits that set pressure.

RETed

It's a mechanical device with a built-in spring that allows any pressure past the spring tension to relieve itself.


Yes, that sounds normal.


As long as the key is in the "ON" or "START" position, yes.


Unless you can blow over 30psi of pressure, that's normal.
Most people cannot blow more than 10psi at any one time.


Why not confirm the fuel injectors are firing?


-Ted

rOt0rHeAd

Is hearing them click when I turn the CAS not confirming that they are firing? What is another way to check to see if the injectors are firing?

HAILERS

If they are clicking, they are opening and shuting.

You should be ab le to hear the fuel passing thru the rail and returning to the tank when the fuel pump check connector is jumpered and the key is to ON.

So....with the key to on and the jumper in, carefully remove the Return hose on the left side of the engine and see if fuel is flowing back into the tank. IF it is, then I'd think the engine is probably flooded if the timing is where it should be. Flooded most likely.

SonicRaT

iTrader: (6)

Or your pump could not be putting out enough pressure to make it passed the stock FPR, and thus is running out of gas when it attempts to start (I've seen this happen with a dead pump, it'd pump fuel but at a VERY slow rate)

HAILERS

Yes. That makes more sense since he didn't get pressure out of the outlet of the fpr. That's IF he did that with the pump running.