So it wasn't the fuel pressure regulator

[BananaClip]

background: http://forums.pelicanparts.com/showthread.php?t=460897

I replaced the FPR today. No change. Still has all the symptoms of a faulty fuel pressure regulator. All my vacuum hoses are good, but there is no vacuum supplied to the fuel rail.

This fitting right here is loose. The metal T joint slides freely in and out of that connection to the intake boot. Could I be losing vacuum through that? Would it even matter?



This is really frustrating. Any Ideas?

[nynor]

sounds like a major vacuum leak. is that an electrical tape repair on the intake boot?

if you aren't getting vacuum at the line to the FPR, there is a problem somewhere. sounds to me like you need to start taking stuff apart until you find it.

[doc993md]

Go for the basics first check cam timing ,compression and fuel pressure first. Also there is a check valve on the fuel pump which will cause hard starts because the fuel leaks back through the fuel supply line instead of the return. Check the ignition system also bad wires. Pull all the plugs and read them to see what the motor is doing. Is it all cylinders or only 1 or 2 acting up. If the are really wet either ign prob or injector problem. You can listen to them with a stethoscope and make sure they are opening and closing. You'll hear them snapping. Seen many stuck and you can sometimes get them to work again by giving them a love tap. Usually you have to hit them harder than you think. Since the car starts it's not the reference sensor, the speed maybe. Try switching them and see if the motor starts at all. If you arr looking for vacuum leaks try to pressurize the intake with about 3-4psi using a cheap air reg and a adapter to the intake boot, then spray the intake system with soapy water. You'll see bubbles or foam being created on the surface of the leak.This is how it's done at the dealer but with a very expensive machine that injects smoke into the system, most commonly used for evap. system diag. Same results differently methodology. Just start with basics and determine overall system health before creating alot of problems or spending money on the wrong fix. Doing all this will more than likely get you a solid answer for all your work, not just a guess.

Good luck

[nynor]

i looked at the picture again. it definitely looks like an electrical tape repair, wound around the middle of the boot. this is where you start, regardless of any other issue, because anything you find will still require this to be rectified and it is a known problem. replace the intake boot.