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My 2001 Mazda 626 Lx 2.0L check engine light is on also misfiring badly, exhaust smells like unburned gasoline, could my spark plug wires be bad?

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  • Mazda Master
  • 2,259 Answers

Oxygen sensors may be bad

Posted on Apr 19, 2017

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: check engine light

Had the same codes on my truck. cat converter was plugged. I was told to take the cat off and gut it, then put it back on and it would run fine, but that didn't work. You need a new cat. Might want to replace the o2 sensors before and after the cat also. Hope this helps.

Posted on Feb 27, 2009

juggernautxt
  • 145 Answers

SOURCE: 2001 daewoo lanos check engine light

oil is non conductive so I doubt that's the problem, but the oil leak should be fixed to reduce problems down the road.
as for the misfire could be a couple things, fouled plug(s), a plug wire(s) that has cracks, or even valves that are not seating which i doubt from your explanation.
I would change your plugs and wires first, and fix oil leak. if this does not fix the issue there are other things going on.

Posted on Apr 30, 2009

  • 365 Answers

SOURCE: My 1997 Geo Prizm has been misfiring in cylinder

do a leakdown check, you may have a valve that is leaking
I am not up to date on that motor but if it has a distributor cap the terminal for that plug may be tracking inside the cap or it may be cracked and causing it to short and creating the miss
hope this helps in some way

Posted on Jun 18, 2010

  • 630 Answers

SOURCE: I have a 2001 Dodge Caravan Sport 3.3. Started

Ok the melt down on the wire harness may have fried other components along the way.... I would even suspect the BCM being toast at this point.... better have someone run a real good scan on it and give you a print out of the possible causes before you even attemnpt any further investigations of component guess work...this is not something that is easuily rectified.
if you have a tech in the area that is very good electrically he may be the savior you will be realying upon.
Hope this helps.

Posted on Sep 17, 2010

jayhawke
  • 338 Answers

SOURCE: Check engine light on a 96 Mazda B2300, 4 cyl.,

1-try some Lucas Engine Clean . 2-Change wires and plug

Posted on May 04, 2011

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1 Answer

Got code505 and my front exhaust gets cherry red


The two may not be related. The 505 code is for the IAC motor in the intake of the engine. Most often the cause of cherry red exhaust manifolds is unburned fuel getting into the exhaust and burning there. This can be due a a bad spark plug, plug, wire or coil causing misfires resulting in unburned fuel being ejected into the exhaust stream. It could also be due to a cracked or broken intake or exhaust valve. This would result in low compression in a cylinder, causing a misfire and having the same result.

Aug 10, 2016 | 2004 Mazda MPV

1 Answer

Vehicle is hesitating, like it is going to cut off.


There are a few things that can cause an engine misfire and hesitation. Does your van have a CoP ignition system? (Separate ignition coils for each spark plug) Or coil pack? You may have bad ignition coil(s); that would cause a misfire. If you have a dirty/clogged/leaky fuel injector for cylinder 3, that could also cause a misfire condition. When you replaced all the spark plugs, did you look at the plug from cylinder 3? Did they all look the same? Sometimes you can get clues to what is going on in your cylinder by how the spark plug looks: if it's white or glazed you are running too lean and could indicate fuel injection problem, if it's got burnt oil on it and it's sludgy you may have a leaky gasket or worn piston ring that is letting oil up into the combustion chamber and fouling the plug, causing a misfire. If your check engine light comes back on and it's the same misfire code, have the coil for cylinder 3 checked to see if it's weak or bad. Or you can do a home remedy check and swap a known good ignition coil from another cylinder to 3, reset the code, and see if the misfire moves to another cylinder. If it does, you know the coil is bad. You can pick up an ignition coil for pretty cheap on the internet ($30-$70) if that's the problem and they're simple to install (a pain if they're on a cylinder that's under the intake manifold, but just because you have to unbolt a bunch of stuff to get to it...time consuming but not too difficult). I have a 2001 Mazda Tribute and had a couple of ignition coils go bad, causing misfires. This seems to be a semi-common problem for early 2000's Mazdas.

Apr 20, 2013 | 2005 Mazda MPV LX

1 Answer

Engine light came on, had a p304 code. Took car for repair, mechanic could not figure out why engine light came on. Cleared light, car started to hesitate when stopped, engine light came back on. Spark...


p0304-misfire no 4 cylinder--can be bad plug-coil -wire-problem with 02 sensor--fuel injector-bad exhaust valve-cat conv- poor ,compression -these are most of the reasons that an cause a misfire and yours is specifying the no 4 cylinder

Apr 10, 2013 | 2001 Ford Focus

1 Answer

My 2001 pontiac montana minivan is misfiring on plug 6 and 3 and the van has strong gas smell and the van shakes real bad


you should conduct spark test in spark plug on high tension wire and compression test in the that plug 6&3 strong gas smell is the result of unburn fuel!!!!but the best solution to bring the car to the expert!!!!!!

Sep 13, 2012 | 2001 Pontiac Montana

1 Answer

2001 Mazda Milleniacheck engine light came on. .car is running rough and hesitates while moving. codes says misfire on cylinder 6. Had tune up. put in new distrutor cap. Still drives really bad. . ....


check all spark plug wires and replace. age and wear and tear will cause them to crack and therefore create the misfire in your cylinder causing the engine to run rough

Apr 05, 2011 | 2001 Mazda Millenia

2 Answers

I have changed ditributor cap spark plugs for my mazda626 92,v36,2.5. after i started its misfiring and i think its not burning the fuel,can see smoke coming from the exhaust.as i try to rev up the rpm...


Make sure the spark plugs are properly gapped (this will cause misfires). Replace all spark plugs wires!! Insure there is no oil inside the spark plug chamber.

Oct 06, 2010 | 1992 Mazda 626

1 Answer

2001 ford e250 service engine light is on. computer shows cylinder #7 misfire code.


A code P0307 Cylinder #7 Misfire may mean that one or more of the following has happened:

Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer

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.

Jan 10, 2010 | 2001 Ford Econoline

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