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Hello and welcome!My name isCustomerand I can assist you with your question.
This condition is caused by an engine breathing issue or severe lean condition. You would need to run some tests to see which one is causing this condition. Checking engine vacuum and fuel pressure would be the first two steps/checks you should do.
There is no way to check fuel pressure without a fuel pressure gauge.
Fuel pressure specs are 38 to 46 psi on this engine.
YES< it sure sounds like a severe LEAN condition causing this issue.
Thats incorrect. The engine will remain running with the vacuum hose removed from the regulator. The only thing that should have happened is the fuel pressure should have gone up a few psi.
Keep in mind, you need to check fuel pressure UNDER A LOAD WHEN THIS PROBLEM OCCURS to do the test properly.
You would either need to do a brake stand (put the engine under a load in gear) while an assistant watches the gauge or simply get a fuel pressure gauge you can hook up to the fuel rail under the hood and that allows to you view the specs while inside the vehicle while driving down the road.
The same as it should be with the vacuum hose removed from the regulator.
That would tell you that the fuel pump is bad/weak and needs to be replaced.
Either one would work. Because the regulator is not working or out of the picture with no vacuum going to it (hose removed or under a load)
It'sCustomerand I just wanted to check in to see how things are going and to see if you need any further assistance?