I've got a better question, why is this question in the Chevy venture forum ?
Oil pressure shouldn't register at all until the engine starts and builds up pressure.
With a fuel pressure guage connected, Key on 60-65psi any less & engine will be hard to start possibly cranks wont run. If motor starts than readings should be 54-58psi
The oil pressure is zero when the engine is not running. The oil pressure sensor will read the low pressure for a second, when the engine first starts.
Most cars would not have any oil pressure until after the engine starts turning because the oil pump is driven mechanically off of the engine.
If you put fuel into the intake and it starts and keeps running, replace the engine coolant sensor. If you put fuel into the intake and it starts but stalls it probably is a bad fuel pump or pressure regulator. Do a fuel pressure test. Need to know what model, year and engine you have to help you any more.
A bad catalytic converter can cause hard starts if it has become clogged. This produces excessive back pressure in the engine.
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Depends on the engine but severe engine damage will start to occur almost immediately. It will run a few minutes until it starts to overheat then the engine will seize. It will not take long to destroy the engine.
The very first thing you should see is the oil pressure gauge start to indicate pressure. (This is assuming you have an oil pressure gauge, but all large trucks have them.) If you don't have any pressure within five seconds, turn the engine off.
That sounds like a problem within the engine control module or possibly the wiring,
possibly your motor mounts. i had the same issue with my old sunbird
Yes. A fuel pressure regulator maintains the adequate fuel pressure required by the engine. A faulty fuel pressure regulator might leak fuel or cause your engine to run lean. It could create hard starts, knock and ping, or hesitationat full throttle.