Car runs rough when engine cold but runs o.K when warm

Tiny
RALPH48
  • MEMBER
  • 2000 PROTON
  • 76,000 MILES
When car is started after sitting for long enough for the engine to go cold it coughs and sputters and occasionaly stalls until warmed up then it runs o.K
Wednesday, December 7th, 2011 AT 1:40 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
https://www.2carpros.com/articles/engine-misfires-or-runs-rough

1.Defective spark plugs

2.Inadequate spark/coil,defective spark plug wire.

3.Lack of compression

4.False air leakage.

5.Faulty fuel injectors.

6.Insufficient fuel pressure.

7.Contaminated fuel.

8.EGR valve that is leaking.

9.Oxygen sensors.

10.Throttle position sensor.

11.Manifold absolute pressure sensor

12.Mass Airflow Sensor

13.Idle air control valve

Note: If it doesn't apply disregard it-
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
+1
Wednesday, December 7th, 2011 AT 1:45 PM

Please login or register to post a reply.

Related Engine Runs Rough Content

Is it Safe to Drive Check Engine Light?
VIDEO
Is it Safe to Drive Check Engine Light?
Instructional repair video
Check Engine Light
GUIDE
Check Engine Light
Why is my check engine or service engine soon turned on? In this guide we talk about what this is associated with this notorious light, what it is used for and what you...

Sponsored links