Mitsubishi Lancer and Lancer Sportback Newer to the United States, the Lancer line offers a sporty compact sedan, with all of the fine styling of the performance minded Evolution.

rough idle in park

  #1  
Old 04-20-2009, 04:54 PM
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Question rough idle in park

has anyone had the problem after a drive then but it in park and the motor goes to a rough idle almost about to die. wht to do anyone with suggestions?
 
  #2  
Old 04-21-2009, 07:49 AM
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We need more info what kind of car, How old is the car?

Have you done a tune up,valve adjustment,fuel filter change etc etc?
 
  #3  
Old 04-21-2009, 07:04 PM
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update... 2003 lancer oz has had tune up timing belts replaced and reg repairs
 
  #4  
Old 04-22-2009, 07:50 AM
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Could be a ton of different things. Has gas mileage dropped? Have you cleaned the throttle body? When were the injectors last cleaned?
 
  #5  
Old 04-22-2009, 06:12 PM
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well i am pulling a code for p0171
 
  #6  
Old 04-23-2009, 03:46 PM
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Seems the engine's running lean. Have you replaced the fuel filter?
 
  #7  
Old 04-23-2009, 08:46 PM
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Originally Posted by Skiddy View Post
Seems the engine's running lean. Have you replaced the fuel filter?
lol you know your generic codes Hes right system is running lean,it can be numerous things. so I say check your basics vacuum,fuel pressure,etc...
 
  #8  
Old 04-24-2009, 04:01 PM
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you dont think it may be the air mass sensor
 
  #9  
Old 04-24-2009, 04:17 PM
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LOL! Yes I've had my share of codes to deal with. MAF would normally trigger a light on the dash. With the engine running, unplug the MAF and see if it runs better.

Also take a CLOSE look at all the temperature and pressure sensors on the engine to see if they are reading accurately. When the ignition is on, and the engine off, you can use a scanner to read the temperature and pressures to see if they meet what you expect. Obviously all temperature sensors should read near ambient and pressures near zero or atmospheric.
 
  #10  
Old 04-24-2009, 08:13 PM
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Originally Posted by Skiddy View Post
LOL! Yes I've had my share of codes to deal with. MAF would normally trigger a light on the dash. With the engine running, unplug the MAF and see if it runs better.

Also take a CLOSE look at all the temperature and pressure sensors on the engine to see if they are reading accurately. When the ignition is on, and the engine off, you can use a scanner to read the temperature and pressures to see if they meet what you expect. Obviously all temperature sensors should read near ambient and pressures near zero or atmospheric.
It can actually set a MIL-camrys
But I still think he should check his basics-Compression,Vacuum,Fuel,Ignition-Your idea is good though Personally I get our DSO out works so nicely
 

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