http://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-

Answered by rasmataz
68 questions asked

UN-JEWG YOUR BATTERY

INSTALL FULLY CHARGED OR NEW BATTERY...DON'T MATTER....NOT ANOTHER JUMP

INSURE CHARGING SYSTEM WORKS....A POPULAR AUTO PARTS STORE WILL DO IT FOR FREE MOST OF THE TIME

YOUR "RUN" DOWN BATTERY MADE THE COMPUTER GO HAYWIRE

JUMPING YOUR RIG, FIRED YOU UP, GAVE YOU "JUICE", CHARGED YOUR BATTERY, OR ENABLED YOUR STARTER TO WORK

COMPUTER IS STILL HAYWIRE, FROM THE VOLTAGE DROP INITIALLY--NOW MAY STILL BE RUNNING ON "HAYWIRE DATA"

UN-JEWG-ING MR. BATTERY AND............A.........10 MINUTE WAIT, SHOULD RESET MR. COMPUTER

THEN INSTALL YOUR FULLY CHARGED BATTERY (RECHARGED, DIFFERENT, OR NEW)

OFF TO THE PARTS STORE---FOR BATTERY AND CHARGING SYSTEM TESTING!

IF YOU DON'T GET THIS STUFF CHECKED..............

IF THE BATTERY OR CHARGING SYSTEM SHOULD DROP VOLTAGE AGAIN

GUESS WHAT?

SAME THING WILL HAPPEN!

RETURN WITH WONDERFUL NEWS!!!

..........................AND YOU OWE ME LUNCH!

THE MEDIC

Answered by CJ MEDEVAC (expert)
6,880 answers provided