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Misfiring on cylinders 1 2 3

Replaced plugs ,have a big exhaust leak

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Need more information about the vehicle but sounds like the distributor cap and or rotor may be corroded. The points of contact can become covered with electrical corrosion. if you clean the four points and the rotor under the distributor cap it may fix the problem.

Misfiring on cylinders 1 2 3 - 12_30_2012_12_06_38_am.jpg

Posted on Dec 30, 2012

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SOURCE: 97 isuzu hombre cylinder 2 misfire

1998 isuzu rodeo wont start no spark,no injector pulse

Posted on Jan 24, 2009

landsend
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SOURCE: misfire in cylinder 1 2001 mercury sable

Next change swap the injector with another and see of the problem moves.  If it does it's a bad injector.  

Posted on Mar 26, 2009

  • 119 Answers

SOURCE: MISFIRING ON CYLINDER 1 VW POLO 1.4 3CYLINDER

I have changed a few cylinder heads under warranty for this type of problem. The exhaust valve guides wear, this causes the exhaust valve to seat badly, giving low compression. if one cylinder compresion reading is more than about 50 psi below the others, then this warrants head removal. It is quite a job, due to the fact that the camshft id chain driven. If you are up for it then once the head is removed, poor liquid into the exhaust ports and see if it leaks out through any of the exhaust valves.

Posted on Jul 23, 2009

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SOURCE: i have an audi 80 misfiring on idle but ok when

Check the rubber intake boot and all vacuum hoses.

Posted on Sep 19, 2009

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SOURCE: 2001 nissan altima code says cylinder 1 miss fire.

a lot of people have reported this issue with the 2001 Nissan altima. it is a design flaw and the idle rpm fluctuation is caused by a bad intake manifold gasket. the part only costs about 10 dollars but do to the 5-10 hours it takes to replace it is a very costly on the labor side

Posted on Feb 05, 2010

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1 Answer

Honda odessey engine code p3100


There is no p3100 code!!

I think you copied this wrong. the code is p0301, which is a common one.

The P0301 code means that the cylinder 1 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 1. If the problem persist more tests needs to be done to diagnose problem.

Possible causes
- Faulty spark plug 1
- Clogged or faulty fuel injector 1
- Faulty ignition coil 1
- Fuel injector 1 harness is open or shorted
- Fuel injector 1 circuit poor electrical connection
- Ignition coil 1 harness is open or shorted
- Ignition coil 1 circuit poor electrical connection
- Insufficient cylinder 1 compression
- Incorrect fuel pressure
- Intake air leak

Most likely cause:
Faulty spark plug 1 or Faulty ignition coil 1 (Ignitor coil)

Either are easy fixes. Start with a new spark plug. If the problem continues replace the coil. Pic below. new about $30-$40.





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Apr 27, 2015 | 2005 Honda Odyssey

1 Answer

Running rich


Hi Justin
you seems that you have a good idea about engines and injection systems, lets say that the computer see's rich exhaust and pulls back fuel mixture. creating misfire. why the engine is misfiring on one cylinder only??
my advice to you
1 search for a vacuum leak corresponding to the misfiring cylinder, like a manifold gasket or injector seal.
2, do a compression test for all cylinders, probably you have a burnet valve.
Good luck and let me know how it goes.

Mar 03, 2014 | Kia Sedona Cars & Trucks

1 Answer

2001 deville cylinder misfire 4


the problem is the injector or injector wiring
oil can only get to the cylinder via the inlet and that will burn off or foul that plug
MAF/VAF will cause misfiring
the oxygen sensors to replace are the heated oxygen sensors in the exhaust manifold before the cat converter not the ones after the converters

Aug 15, 2017 | Cadillac DeVille Cars & Trucks

1 Answer

I have a 1997 ford explorer and it reads 1 2 4 6 cylinders are misfiring and bank 1 and 2 are lean and bank 2 sensor 2 problem please help!!!!


If the front oxygen sensors have over 100,000 miles
on them change & then work on vacuum leaks in exhaust
prior to converter & then ignition misfires

Spark Plugs--every 3 years
Clean MAF Sensor

Exhaust Converter may be shot,then only last 12 to 14 years
If so-- then do the rear sensors as well

Nov 27, 2012 | 1996 Ford Explorer

1 Answer

2002 saturn vue cylinder 1,3,5 misfiring when swapped coil pack it went away now cyl 2,6 misfiring.


having PO 304 = Misfire cylinder 4,PO 306 = Misfire cylinder 6, as I read above you have done the most. The thing that you have missed is to check whether the Catalytic Converter is faulty or not. To get an idea check whether you have a smell like rotten eggs at the end of the exhaust,you start having problems with cat and needs replacement. My advice before you go for a cat replacement is good to visit an MOT center and check your emissions and then you decide,

Aug 10, 2012 | Kia Rio Cars & Trucks

1 Answer

Giving a 300 and a 301 code where do i start sounds fine when started and then when you put in gear it start misfiring


P0300 - Random / Multiple Cylinder Misfire Detected

Possible Causes:
- Improper spark plug
- Insufficient compression
- Incorrect fuel pressure
- The injector circuit is open or shorted
- Fuel injectors may be faulty
- Intake air leak

Possible Solutions:
- Perform Injector Service
- Replaced Spark Plugs
- Replaced Injectors
- Replaced Ignition Coils

P0301- Cylinder Number 1 Misfire Detected

Possible Causes:
- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak at cylinder

Possible Solutions:
- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1

Most likely your issue is with cylinder number 1. Follow the info I have provided and you should be able to solve this issue.

Jan 14, 2011 | 2002 Toyota Tacoma

2 Answers

My 1997 Nissan 2.4 liter pickup suddenly began misfiring at idle only. It runs normally at all other speeds. It seems to be misfiring on one cylinder only. Any ideas?


If there are no symptoms (symptoms may include: the engine may be harder to start; the engine may stumble / stumble, and/or hesitate), 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.

A MISFIRING 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

With one scanner you can know exactly what cyl is misfiring. Tell us news.

Jul 02, 2010 | 1995 Nissan Altima

1 Answer

The computer say's theres ramdom misfiring/or misfiringin some cylinders


Best way to check for misfiring is to do a cylinder leakage and injector balance test.
To do leakage test go to Autozone and purchase an adapter for your spark plug threads so you can install this adapter and fill the cylinder w compressed air to conduct your test. Remove plugs and disable fuel pump and set each cylinder your about to test at TDC, then fill cylinder w air and listen for air leaks .
If air escapes threw intake manifod intake valve(s) are leaking . If air escapes threw exhaust exhaust , exhaust valves are leaking. If air is heard in crank or PCV valve then pistons are leaking.
Do an injector balance test . this one I recommend you have a technician do . Its a little dangerous.
Lastly spark tests. Although not completely conclusive ( in other words this test will tell you if you have spark or not it will not tell you how much spark) you can use a spark tester and test each cylinder for spark. A scopemeter will give you the amount of spark,. As you can see the best thing to do and its worth the money is to bring it to a repair shop. I'm hoping that its not engine mechanical that are giving you the grief (thats big money) hopefully you luck out and its plus and wires. I'll even take an injector. Good luck

May 04, 2010 | 1999 Chevrolet K1500

1 Answer

Misfiring of engine and fuel consumpion


The O2 sensors on these are a common issue as well as the "pre cat" bolted onto the exhaust manifold. Remove the coil packs and plug wires and look for white tracking indicating an electrical leak. This is also common on these models. Look for oil leaking into the holes of the spark plugs. If you have a severe lack of power and low exhaust flow, it is probably the "pre catalytic converter". If everything else checks out, I would disconnect the exhaust at the cylinder head and pull it back about 1/2"(inch) and see how it runs. Let me know and I will walk you through the rest.

Apr 16, 2010 | 2000 Kia Sportage

4 Answers

MISFIRING ON CYLINDER 1 VW POLO 1.4 3CYLINDER


I have changed a few cylinder heads under warranty for this type of problem. The exhaust valve guides wear, this causes the exhaust valve to seat badly, giving low compression. if one cylinder compresion reading is more than about 50 psi below the others, then this warrants head removal. It is quite a job, due to the fact that the camshft id chain driven. If you are up for it then once the head is removed, poor liquid into the exhaust ports and see if it leaks out through any of the exhaust valves.

Jul 03, 2009 | 2002 Volkswagen Golf

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