My 2000 oldsmobile alero 4 cylinder is idling low

2000 OLDSMOBILE ALERO
177,800 MILES
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MD31312003
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Oil going in the throddle body, idling low, has random missfires. Shuts off randomly. I dnt know what is wrong. I have replaced the ignition coil module, the fuel pump, fuel filter, fuel pump relay, coils, coil housing, spark plugs, o2 sensor, and the air temp sensor, and I keep having problems. Hope you can help me.
Jul 16, 2013 at 5:01 PM
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JACOBANDNICKOLAS
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If you are getting oil in the intake manifold, that tells me there is excessive blowby from the engine. What happens is as an engine gets older with high miles, the rings, valves... wear and allow excessive pressure to build in the crankcase. As a result, oil often times makes its way to the intake. Check the PCV valve and make sure it isn't plugged. If it is good, you may want to do a compression test to see if everything is within spec.
Jul 16, 2013 at 6:42 PM
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MD31312003
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I was told I have an oil ail/ separator not a pcv valve. I did a compression test and it was 160 every cylinder
Jul 17, 2013 at 3:32 PM
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JACOBANDNICKOLAS
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The compression sounds good. When the car dies, has it ever not restarted?
Jul 18, 2013 at 3:34 PM
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MD31312003
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No it will start back up after a couple trys
Jul 21, 2013 at 3:25 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
When it doesn't start, you need to check for spark and fuel to the engine.
Jul 21, 2013 at 8:43 PM
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