SOURCE: Misfire on cylinder 1 and 3
Do you observe abnormal idle speed? It may be just an indicator fault; not a really engine firing problem.
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You will find a lot of technical information for your model.
SOURCE: my 2000 hyundai acc
Possibly coils check compression make sure the plugs are the proper ones some engines are particuler about the plugs
SOURCE: 2003 Hyundai Accent with Engine skip...error code P0300 P0301
I have seen coil packs go bad on several Hyundai Accents, the coils will do exactly what they are supposed to (hence your check with an ohm meter), however, the coils short through the outer casing. Try running the car when it is dark out and spraying the coil packs with water. Listen for clicking and watch for arching from the coils to any metal around them. Look for abnormal detonation marks in the outer casing. My guess is you just need a set of new coils. If the Problem is worse in the rain then you have found your problem. Remember, If your car has been misfiring (as noted by the engine codes you listed), the EGR valve can become clogged and damage can be done to your catalytic converter as unburned fuel detonates inside it (keep an eye out for O2 codes in the future). Also, your new plugs can become fouled, be sure they are clean once you fix the problem. Checking your plugs can also be a useful indication of which cylinder is misbehaving.
SOURCE: Misfires on 1997 Hyundai Elantra!!!
can you please tell me how to fix these 2 codes on a 1.8L HYUNDAI Elantra p0707 and p0712 i just had the trans rebuilt and now these codes are coming up
SOURCE: stalling and hesitation, all 4 cylinders misfiring, once warmed car seems to run ok
There are various questions to ask in order to help you.
When does it stall?
If it stalls when the AC of the car turns on, then this handy diagnostic article will help solve your problem:
http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Engine_System_Engine_Stalls_When_AC_Turned_On.htm
Likely applicable to your situation--since you say the car runs fine when it is "warmed up"--when the car stalls because the engine is NOT warmed up and is otherwise cold, this handy diagnostic article will help solve your problem:
http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Engine_System_Engine_Stalls_When_Cold.htm
And as to backfiring when you initially run your car, this handy article really helps in identifying the common causes of such a problem:
http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Engine_System_Engine_Backfires.htm
This should help.
Good luck!
Brad
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