So you can give a bit of throttle above idle position and then crank the engine and it dies in five seconds? It does this the same just like if you give it no extra throttle?

Sounds like an oil psi switch issue.

When cranking, the fuel pump power bypasses the oil psi switch. When running, it goes thru the switch.

On most systems anyway.

Can't crank it unless it's in neutral, but whether you give it tho title or not it dies out almost like a vapor lock situation.
sometimes it will crank right back up and sometimes it doesn't.

You should have a button on the shifter so you can move forward and it still be in neutral. Since it starts and pressure is 30psi, then dies and it's 37psi tells me you have pressure and he fuel pump is running. The IAC has about a 5 second window where it's open for initial starting, then closes down some for idle. If you can give it a bit of throttle (in neutral) and it will stay running at a higher rpm then it's the IAC

Wouldn't the IAC throw a code?

Per the info in this thread, your fuel pressure is low

http://www.offshoreonly.com/forums/g...ressure-2.html

The fuel pressure is not low enough to shut it down imo , I still think it looks like a sensor issue, something is telling it to shut down.

I agree, it would stumble before stalling not just cut off clean like he said. I just wanted to throw that link out there.

No, not for the VST systems and TB-V ignition, there are not that good. If your IAC is just clogged up (dirty) it opens when you crank, once fired up it starts to close. It's pretty simple to remove and clean it.

Fuel pressure should be 34-38psi when ignition is turned on. Once started your pressure regulator should drop the pressure 3-10 psi for 10inhg vacuum or more. If fuel pressure is below 34psi check for restriction in the fuel line. If no restriction is found, block off fuel return line. Cycle key on/off a few times. Fuel pressure should raise above 38psi. If fuel pressure raises above 38psi you have a faulty pressure regulator. If pressure less then 34psi you have a bad high pressure fuel pump

Here is what is in manual 16 for hard starts and stalling
1. Proper Idle Air Control (IAC) operation.
2. Possible open the in following circuits for CKTs 410, 417, 416, 813 and 814.
3. Possible short to ground in CKT 417, Throttle Position (TP) sensor signal, CKT 416 Throttle
Position (TP) sensor 5 volt reference and CKT 451 diagnostic test circuit.
4. A sticking throttle shaft, binding linkage or salt corrosion will cause a high Throttle Position (TP)
sensor voltage (open throttle indication), the ECM will not control idle. Using a scan tool or voltmeter
record Throttle Position (TP) sensor voltage. It should read approximately .7 volt closed
throttle and approximately 4.5 volts at Wide Open Throttle (WOT).

I appreciate all the advice guys.... I haven't had much time to fool with it, but I'll dig into it this weekend!