Question about 1999 Hyundai Accent

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What is causing Hundai Accent cylinder 2 to misfire?

Just bought a 1999 Hundai Accent. Before I even got it home, the car is misfiring. Diagnostic test shows a cylinder 2 misfire? This is my daughters first car and we spent all of our savings on this car. I am so upset:( Any advice?

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 14 Answers

SOURCE: my 2000 hyundai acc

Possibly coils check compression make sure the plugs are the proper ones some engines are particuler about the plugs

Posted on Mar 04, 2009

  • 1 Answer

SOURCE: 96 bmw 740il misfire

This is a pretty common problem. I would change your valve cover gaskets. They run around ~ 50 bucks. If they are bad it will leak oil into spark plug well and cause a misfire. Very known on the 740.. Also if tune was not anytime not too long ago id change spark plugs while you at it. Then clear the computer and if you still get misfire on 8 try changing the ignition coil which is right about the cylinder with cylinder ignition coil 5. clear the computer. if you get random misfire and misfire cyclinder 5 after then its your ignition coil. parts store runs around 100 bucks

Posted on May 04, 2009

  • 166 Answers

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

Posted on Jun 01, 2009

ghost45
  • 1280 Answers

SOURCE: 2000 hyundai accent code 302 misfire and slow responce o2 senser

Yep!.. Typical with an engine cylinder misfire. Inspect the plug and ignition wire, especially the insulator. If you see a 'christmas tree' pattern on the insulator, that's where your problem is.

Posted on Oct 19, 2009

ZJLimited
  • 17970 Answers

SOURCE: 2005 Hyundai Tucson 2.0L During start-up

A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.

For example, a P0302 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #2; same condition in P0301 - cyl #1, P0303 - cyl #3 and P0304 - cyl #4.

A code P0300 (or 301, 302, 303 or 304) may mean that one or more of the following has happened:
Faulty spark plugs or wires
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector(s)
Burned exhaust valve
Faulty catalytic converter(s)
Stuck/blocked EGR valve / passages
Faulty camshaft position sensor
Defective computer

About your possible solutions, if there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.



So, your code P0170 is one that surfaces with certain makes of automobiles more than others. In writing this article I've added Mercedes-Benz-specific info since it seems that M-B (and VW) are most prone to having this P0170 surface along with misfire codes or other fuel trim codes. P0170 means there was a malfunction in the computer's control of the air:fuel ratio.

It also indicates that the fuel trims reached their limit of adding fuel while trying to compensate for a actual or perceived rich condition. When the fuel trims reach their rich correction limit, the PCM (Powertrain Control Module) sets a P0170, indicating a problem or malfunction in the fuel trims. It may also have a P0173 referring to the same malfunction but on bank two.

Potential causes include a vacuum leak, unmetered air leaks Fuel saturated engine oil Leak in turbo air charge hoses (if equipped) Possibly bad O2 sensor (If Mercedes, may require adaptation with M-Benz compatible scan tool.) Oil contamination in MAF connector or O2 sensor connectors. Also check ignition coils, cam and crank sensors, and oil sensor for leakage contributing to oil intrusion in wiring harness. Defective MAF (Mass Air Flow) sensor (especially on Mercedez-Benz and other European autos. There are a lot of problems with aftermarket MAF sensors).

If you have this code and access to a scan tool, observe the MAF sensor reading in grams/sec. The reading will be different for different automobiles, so get a good spec. I'm going to stick with what would be normal for a Mercedes (1.8L), since they have the bulk of the trouble. Expect to see at idle 3.5-5 g/s (ideally). At 2500 RPMs with no load it should be between 9 and 12 g/s. On road test, at WOT (wide open throttle) it should be 90 g/s or well above. If it's not in specs, replace it. Be careful of Ebay MAFs. Often they don't work according to OE specifications. If the MAF checks out and there is no oil intrusion at the connector, check fuel pressure and ensure that there are no leaks at the regulator internally or externally. Check all vacuum hoses and confirm none are cracked, disconnected or missing. Make sure there are no vacuum leaks at the intake manifold gaskets or tears in the air supply hose. If the engine is turbo charged, be sure the hoses are in good condition and have no leaks. Leaking turbo pressure hoses could cause a rich condition. Inspect the condition of crankcase vent hose under intake manifold and operation of check valve in the hose. (In the "What are the causes?" section) If there doesn't appear to be any problems with the fuel pressure, MAF or vacuum hoses, then inspect the O2 sensor connectors for oil intrusion. A bad O2 sensor could cause a P0170, or P0173. Repair cause of oil leak and replace oil-fouled O2 sensor.

This is location diagram...

zjlimited_487.gif

Bank 1 is always the side of the engine with cylinder #1.
Bank 2 is always the side of the engine with cylinder #2.

Bank 1 is the bank of cylinders on the firewall side.
Bank 2 is the bank of cylinders on the radiator side.

Sensor 1 is the O2 sensor before the cat.
Sensor 2 is the O2 sensor after the cat.

So the one you want is the sensor AFTER the cat on the FIREWALL side of the engine.

Hope this helps.

Posted on Jul 13, 2011

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2006 ford five hundred - engine code P0301. When first starts, no issues, but then idle gets rough and car loses power. Miles from home with no tools but willing to do whatever.


P0301 cylinder # 1 misfire !
P030x - Cylinder x Misfire Detected Description: NOTE: x represents cylinder number 1 through 9.
The misfire detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred. Misfire is defined as lack of combustion in a cylinder due to absence of spark, poor fuel metering, poor compression, or any other cause. Possible Causes:
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Diagnostic Aids: The malfunction indicator lamp (MIL) blinks once per second when a misfire severe enough to cause catalyst damage is detected. If the MIL is on steady state due to a misfire, this indicates the threshold for emissions was exceeded and caused the vehicle to fail an inspection and maintenance tailpipe test. Application Key On Engine Off Key On Engine Running Continuous Memory All - - GO to Pinpoint Test HD . Could be an ignition coil !An to replace it the intake manifold has to come off !

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Hi. You have misfires on cylinders 4, 5 and 6. If there are no faults on cylinder 1, 2 and 3 then I would check the power to the left bank injectors. Also check spark plugs and ht leads. If there are running issues then this should be an easy fix. If the faults are very intermitant then it can be a bit tricky to isolate.

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2008 hyundai accent automatic 117000 miles. check engine light came one and it started losing power to point it would not budge at all. fuel light was on too,. but even after putting gas in it, there was...


Sounds like a ECU problem. The main computer. Take it to a Hyundai dealership and have them check the computer. You don't say how many cylinders if the cylinders are next to each other could have engine or gasket damage

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CYLINDER 2 MISFIRE COULD BE FAULTY SPARK PLUG OR WIRE AND COIL ,COULD HAVE A FAULTY CLOGGED FUEL INJECTOR, LOW COMPRESSION CYLINDER MANY THINGS CAUSE CYLINDER MISFIRE.

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My engine light has come on, I put it on a diagnostic at home and the only thing that it read was that I had a cylinder 3 misfire. Would this cause the engine light to come on?


Yes this will cause the engine light to come on. If it is no longer misfiring, you will have to reset the engine light. You do this by disconnecting the negative cable for a minute or two and then hook it back up. When you start the engine the light should go out. If the light comes on, then you still have a problem.

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HI, a quick way to check and see if the new plug and wire weren't bad when you bought them is to change the #4 plug and wire to another cylinder. Then if the misfire code shows up on that cylinder and not #4 then you know where the problem is.
If it doesn't change from Cylinder #4 then the problem is most likely internal to that cylinder. The most common problem i have seen is carbon build up on the back of the valves. The carbon will heat up and be able to ignite the fuel and cause a misfire in the problem cylinder. You can try after market additives to clean the deposits or have it professionally done. Good Luck

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HELP, MISFIRING: 1999 Audi A6 Quattro Avant Wagon


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It sounds like there is a lot going on.

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