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Oil pressure shouldn't register at all until the engine starts and builds up pressure.

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โˆ™ 2008-10-18 01:29:26
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Q: What is the reading of oil pressure gauge before engine starts?
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What are the symptoms of bad fuel pressure regulator?

If the engine cranks & cranks & cranks before it starts even though it's warmed up already.

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You have pressure in the fuel lines and it doesn't start you put fuel in the intake manifold and it starts Bad fuel pump?

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.

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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.

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What are the signs and symptoms of low fuel pressure?

Some signs are: cranking the engine over a few times before it starts stepping on the accelerator and having hesitation a stumble by the engine when you need power do you have a check engine light yet? When was the last time you changed the fuel filter? It may be clogged blocking fuel.

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A bad catalytic converter can cause hard starts if it has become clogged. This produces excessive back pressure in the engine.

When the engine starts what do you see first in the control panel gauge?

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It's based on the air pressure measurement of the environment. Before it starts to rain pressure dramatically drops. That's particularly why some people have headaches before rains.

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Disconnect positive battery cable for three minutes - this should reset the entire computer or E.C.M.

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when turning the engine off the deposits in the oil screen fall out and as you run the truck the deposits clog the screen back up causing loss in oil pressure... your oil pump may be going bad but i would say the pick-up screen is clogged my advice would to get a new one before engine starts to smoke and lock up..

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