Can low fuel pressure cause misfire??

[handson]

I've got a 92 NA ej22 in a car for my 16 year old daughter that's giving me fits.

I can't get it to idle worth a damn. It shakes and seems like it's missing on #3 cylinder. No power at all.


Here's what I've done:

New plugs/wires
Swapped the coil pack & ingniter from my 92 wagon

Replaced 1 & 3 injectors

Changed cam/crank sensors

Changed timing belt (yes it's lining up right)


Can low fuel pressure cause a misfire like this or does it basically just stumble and not miss on one cylinder?

If I pinch the return hose the pressure does not go up. Also it doesn't hold much pressure in the system.

I need help, 16 year old have no patience at all.

Thanks!

[Legacy777]

What is the fuel pressure?

Have you tried replacing the coolant temp sensor? Have you gotten the car to warm up to normal operating temp....if so, does it idle/run any better/worse?

[handson]

I think the fuel pressure is in the 20lb range, I have to run a better test .

No, it doesn't run any better warm.