Question about 2005 Toyota Corolla

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Can bad sparks plugs cause check engine light to come on

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Flashing Check Engine Light 99 Camry

light flashes when comp. picks up a skip pull code and it will be po300 random miss p0301 p0302 p0303 p0304 all are for that # cyl that has the miss best bet change wires and plugs check for oil on wire to plug end in spark plug hole leaking valve cover gasket or spark plug tubes...

Posted on Dec 31, 2008

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SOURCE: would bad spark plugs on any car make it shake and

Yes bad plugs/ worn plugs /oiled up plugs/ or HTleads with spark jumping will all cause the engine to run rough,and not idle and when it does it runs rough enough to break the engine mounts.
When its dark at night start the engine and look under the bonnet do you see sparks jumping if yes replace the worn parts if no then check plugs and if light grey there ok /if black through away.
So check it out and let me know how you get on . Ron

Posted on Oct 29, 2009

rylee_smith
  • 8619 Answers

SOURCE: Check Engine Light came on while driving. No

Hi

Thanks for using FixYa. The check engine light is on because ECM (Control Module) detected a fault with your car's system. ECM has self-testing capability. When the computer senses that there is a problem with some of the components it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" or "Service Engine Soon" light to tell you that there is a problem and your car needs to be looked at. You'll need to get the codes checked from a nearby dealer/mechanic. Please revert with the codes so that I can tell you where exactly the issue is.


Please do rate the solution and revert for further assistance.


Thanks

Rylee

Posted on Nov 17, 2009

  • 14036 Answers

SOURCE: check engine light comes on

YEP PLUGS MISFIRE WILL MAKE THE CHECK ENGINE LIGHT COME ON..TO BE ON THE SAFE SIDE HAVE AUTO SCAN IT FOR FREE.THEY WILL TELL YOU WHAT CODE YOU PCM IS GIVING YOU.SO YOU CAN FIX CAR.

Posted on Apr 01, 2010

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2 Answers

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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.

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How do you know if your spark plugs are the problem?


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I have a 01 audi allroad an have check engine light on an has code p301


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Apr 16, 2011 | Audi AllRoad Cars & Trucks

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2002 pontiac sun fire engine cuts out at 2000 RPM and stops when you accelerate no service engine light what could be the problem


Possibly a tune up including spark plugs, fuel filter, pcv valve, air filter, and an oil change. Do include the spark plug wires if it has them.
If all of that is fine, see if the spark plugs are covered in oil... that will also cause it to run bad but not necessarily throw the check engine light.
Good luck

Mar 27, 2011 | Chevrolet HHR Cars & Trucks

1 Answer

Would bad spark plugs on any car make it shake and make the check engine light turn on?


Yes bad plugs/ worn plugs /oiled up plugs/ or HTleads with spark jumping will all cause the engine to run rough,and not idle and when it does it runs rough enough to break the engine mounts.
When its dark at night start the engine and look under the bonnet do you see sparks jumping if yes replace the worn parts if no then check plugs and if light grey there ok /if black through away.
So check it out and let me know how you get on . Ron

Oct 29, 2009 | 1992 Toyota Camry V6

1 Answer

No check engine light on runs rough while in gear


Plug Mis-firing (firing-but not adequately) no light and no fire.
Causes: Spark plug bad, spark plug wire leaking.
If you can pull the spark plugs - and you find that one of them is wet or very dirty - compared to the others....the you have the wire/plug source identified.

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