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Low idle shake/misfire

Tiny
CAMEREN TERVORDT
  • MEMBER
  • 2004 OLDSMOBILE ALERO
  • 2.2L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 160,000 MILES
(Ecotec 2.2) When my car is idling it has a pretty good shake and the rpm's bounce between 500-1000 and now every now and then the vehicle says misfire detected on a scan tool, but will run perfectly fine when the code is cleared. Any clue what may be wrong or what could be done to correct it? I have changed the coil pack/plug wires. I am going to try changing furl injectors.
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Sunday, August 14th, 2016 AT 4:53 PM

4 Replies

Tiny
CAMEREN TERVORDT
  • MEMBER
  • 3 POSTS
The shake upon idle is not constant. It usually happens when either going from high speed to a stop or at a sudden stop.
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Sunday, August 14th, 2016 AT 4:54 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,512 POSTS
It sounds like it needs park plugs have you changed them?

Here is a guide that will help you

https://www.2carpros.com/articles/how-to-change-spark-plugs

Let me know what you find

Best, Ken

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Friday, August 19th, 2016 AT 4:53 PM
Tiny
CAMEREN TERVORDT
  • MEMBER
  • 3 POSTS
Brand new plugs were in it. Ac delco iridium's. Spendy, changed the coil pack with 3 different ones then changed the fuel injectors, runs fine now, thank you for the idea though
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+1
Friday, August 19th, 2016 AT 6:03 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,512 POSTS
Glad we can help please use 2CarPros anytime.
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Friday, August 19th, 2016 AT 7:02 PM

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