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Have rough idle which cause my oil gage to rise and fall while sitting still

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Change the spark plugs and check for a bad spark plug wire.

Posted on May 26, 2010

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Posted on Jan 02, 2017

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1989 Honda accord ex 2.3 vtec very rough idle also sitting still depressing gas rpms will raise then fall back


Check for manifold air leaks by spraying carby cleaner around .rev,s will rise if it has leaks from gaskets hoses ,check fuel pump relay resolder the joints inside the relay common proper.

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Idle rising and falling


Check for a vacumm leak from the air filter over to the intake of the engine, although I don't even know what kind of car you have make model and year would be helpful

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2002 4.8l gmc yukon oil pressure problem


My suggestion would be to check it with a mechanical gauge.
You would need to use a Tee fitting to use the sensor to have fuel pressure.
If the mechanical gauge shows steady pressure at idle, it could be a problem in the wiring or the instrument cluster.

Jan 27, 2013 | 2002 GMC Yukon

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Oil pressure drops and rises,, I have checked the sending unit, does theoil pump have fiber gears?


No, the oil pump has steel rotors. The oil pressure is supposed to rise and fall a certain amount, it's normal. As long as the warning light is not coming on at idle, you should be fine.

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it is normal for you oil pressure to to rise and fall
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