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?

 

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?

 

update... 2003 lancer oz has had tune up timing belts replaced and reg repairs

 

Could be a ton of different things. Has gas mileage dropped? Have you cleaned the throttle body? When were the injectors last cleaned?

 

well i am pulling a code for p0171

 

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...

 

you dont think it may be the air mass sensor

 

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