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My 2000 Oldsmobile Alero 4 cylinder is idling low

Tiny
MD31312003
  • MEMBER
  • 2000 OLDSMOBILE ALERO
  • 177,800 MILES
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.
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Tuesday, July 16th, 2013 AT 5:01 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,133 POSTS
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.
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Tuesday, July 16th, 2013 AT 6:42 PM
Tiny
MD31312003
  • MEMBER
  • 3 POSTS
I was told I have an oil ail/ separator not a pcv valve. I did a compression test and it was 160 every cylinder
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Wednesday, July 17th, 2013 AT 3:32 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,133 POSTS
The compression sounds good. When the car dies, has it ever not restarted?
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Thursday, July 18th, 2013 AT 3:34 PM
Tiny
MD31312003
  • MEMBER
  • 3 POSTS
No it will start back up after a couple trys
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Sunday, July 21st, 2013 AT 3:25 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,133 POSTS
When it doesn't start, you need to check for spark and fuel to the engine.
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Sunday, July 21st, 2013 AT 8:43 PM

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