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Getting check engine light after replacing spark plug

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  #1  
Old 06-04-2008, 10:20 PM
marty159 marty159 is offline
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Default Getting check engine light after replacing spark plug

Hi all , great forum , been looking for an answer for my problem , hoping some one can help.Changed spark plugs , but now I'm getting check engine light.So I took it it to auto zone it came back that cylinder 4 was misfiring.Changed the boots from cylinder 1 and cylinder 4 and took it back to auto zone and same thing came up, cylinder 4 misfire.I bought another plug and replaced it still get same thing.Any body know what is up.I tried resetting computer by unplugging it for 15 min. Light stays of for a wile then when I restart truck I get the engine light on again.Any help would be appreciated.Thanks
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  #2  
Old 06-04-2008, 10:26 PM
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derricksmash derricksmash is offline
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Default RE: Getting check engine light after replacing spark plug

same thing happened to me. disconnect negative terminal on battery, go smoke a cigarette, hook it back up. problem most likely solved.

it's probably your vehicle used to the new improved timing supplied by the changing of you plugs.
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Old 06-05-2008, 02:24 AM
marty159 marty159 is offline
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Default RE: Getting check engine light after replacing spark plug

Unfortunetly thats the first thing I tried, including , after unpluging battery , turning on key to on position and waiting 20 min. But still after like the third time I turn on truck , I get the check engine light.Any other way?Thanks
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Old 06-05-2008, 06:48 AM
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Default RE: Getting check engine light after replacing spark plug

What year truck? Which motor? A proper reset is to pull the PCM fuse, get in the truck and close the door (shuts of the chimes). Turn key to on (not start) and wait for the chimes to stop and indicators to settle. Put the fuse back in an' start 'er up. It won't start the first kick, so don't panic. If the CEL comes back, make sure all the plug and coil wires are snug. You may have a bad coil, but that may trigger a different code.
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Old 06-05-2008, 10:11 AM
marty159 marty159 is offline
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Default RE: Getting check engine light after replacing spark plug

Thanks for response, It is a 2006 dodge ram 1500 6 cylinder , I dont think its the coil , because I swaped out coils from cylinder 2 and put it on cylinder 4 to see if I would get a misfire code on cylinder 2 and I did not , I got again cylinder 4 misfire.I will try the the pcm fuse.Thanks
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Old 06-05-2008, 10:07 PM
marty159 marty159 is offline
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Default RE: Getting check engine light after replacing spark plug

Another thing I used the bosch platinum plugs, the guy at autozone said that was no good for dodge trucks , is this true , they wereone ofthe ones recomended for my truck.The code that comes up is P0304.Thanks
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Old 06-05-2008, 11:17 PM
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Default RE: Getting check engine light after replacing spark plug

true, apparently dodge motors like champion copper plugs.
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Old 06-06-2008, 12:55 AM
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Default RE: Getting check engine light after replacing spark plug

dude, u have the same truck as me...

i'm surprised the battery disconnect didn't work. i'm running ngk iridium ix plugs...maybe i had a lesser problem cause our stockers were regular ngk's anyways.

so yea, get back to us. i'm sure that fuse pull will work.
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Old 06-06-2008, 12:58 AM
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Default RE: Getting check engine light after replacing spark plug

only use champion coppers.

Look under your hood on the left side and get the number. Like rc somethin somethin

did you get the right gap? Yours should be a 40
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Old 06-06-2008, 01:08 AM
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Default RE: Getting check engine light after replacing spark plug

Quote:
ORIGINAL: RamItOne
only use champion coppers.
are you saying that YOU only use coppers? or that everyoen should only use coppers?
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Old 06-06-2008, 01:22 AM
herring_jerritt herring_jerritt is offline
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Default RE: Getting check engine light after replacing spark plug

dodge says the on the hemis u shouldnt use anything besides coppers cause they will missfire, not all dodges just the hemis. and the only thing tht i could think is that u gaped it wrong.
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  #12  
Old 06-06-2008, 01:38 AM
marty159 marty159 is offline
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Default RE: Getting check engine light after replacing spark plug

Well the fuse reset didnt work , so I went back to autozone and got what they recomended (motorcraft copper plugs gaped at 44, did the fuse reset , so far so good, but we will see in the morning , after I drive it around.I have to drive from texas to california , hopefully in my truck.Thanks all , will let you know if it worked.
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Old 06-06-2008, 11:01 AM
RamItOne RamItOne is offline
 
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Default RE: Getting check engine light after replacing spark plug

Rc12mcc4

its a 40 gap, not 44.
lift up your hood and you'll see that stamped on the left side of the hood.

Remember when you ask for help from the guys at autozones etc, these are the same guys that ask for engine size when youre wanting to buy wiper blades or head lights.
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  #14  
Old 06-07-2008, 01:08 AM
marty159 marty159 is offline
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Default RE: Getting check engine light after replacing spark plug

I will look under the hood in the morning, Hope that is it , Thanks
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  #15  
Old 06-07-2008, 02:12 AM
RamItOne RamItOne is offline
 
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Default RE: Getting check engine light after replacing spark plug

no prob marty

Derrick- I posted this on another plug post, but a dodge ram is like a cheap hooker, dont buy it anything fancy cause itll only confuse it, but if you buy it the bare essentials and rough it up every once in a while itll run great.
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Old 06-07-2008, 02:17 AM
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Default RE: Getting check engine light after replacing spark plug

Quote:
ORIGINAL: RamItOne
Remember when you ask for help from the guys at autozones etc, these are the same guys that ask for engine size when youre wanting to buy wiper blades or head lights.
And is that 2 or 4 wheel drive... with or without A/C... regular or quad cab?
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  #17  
Old 06-07-2008, 02:25 AM
RamItOne RamItOne is offline
 
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Default RE: Getting check engine light after replacing spark plug

you forgot to ask my wheel size, you're FIRED!!!!!!!!!!!
haha.
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  #18  
Old 06-12-2008, 11:57 AM
marty159 marty159 is offline
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Default RE: Getting check engine light after replacing spark plug

I looked under hood and sure enough gap is 40 , so changed plugs again , useing the champion plugs gaped at 40 , reset computer and again after starting truck the second time , I get check engine light.Im thinkin The code is stuck in the memory, so I will unplug battery for a while see if that works.Anyone got any other Ideas.Im getting prety good at plug changing , yall.
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Old 06-12-2008, 11:57 AM
 
 
 
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06, cel, change, changing, check, cylinder, dodge, engine, hemi, light, misfire, plug, plugs, ram, spark

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