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Old 03-22-2015, 10:43 PM   #1
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Misfiring and sputtering

I have a 2000 Ford Mustang gt 4.6L I changed spark plugs and cleaned MAF sensor cleaned throttle body flap,new IAC valve,and I cleaned the EGR valve also.Still i get a little misfire and sputtering with shaking when I give it gas. If anyone is going through this or have gone through something similar.please shed some light on my problem.


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Old 03-22-2015, 11:44 PM   #2
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How many miles are on the car?
Do you know if it still has the original coils?
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Old 03-23-2015, 12:20 AM   #3
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Old 03-23-2015, 06:08 AM   #4
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no check engine light? it could be a bad coil somewhere. after addressing the coil packs, try to get a compression test done. also, buy the rebuild kit for the coils. its a pack of boots and springs for the coil boots. usually that does it, but you may still need at least one new coil.
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Old 03-24-2015, 11:44 AM   #5
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Misfiring and sputtering

It's got over 100k miles on it right now and yes it still has the original coils in it


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Old 03-25-2015, 01:32 PM   #6
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Yea get your coil packs changed. I guarantee you that's the problem



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Old 03-25-2015, 11:02 PM   #7
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Bad coil usually emits a cel


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Old 03-25-2015, 11:07 PM   #8
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Quote:
Originally Posted by alecas447 View Post
Bad coil usually emits a cel


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Not when it is an intermittent miss under load. My parents expy just had this and it was the cop

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Old 03-26-2015, 06:37 AM   #9
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mine did that as well. everything seemed ok, no misfired coming up on a cel, but everytime i accellerate, it would struggle and stutter until i get over 2000 rpm, then it would kinda smooth out. changed the suspected coil, and no more issue. I worked at an autoparts store so i kept slappin on different replacement sensors and what not, and nothing else fixed it. swapped a coil, and done.
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Old 03-26-2015, 07:59 AM   #10
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99% sure it's a coil as mentioned above... my 99 had the same symptoms. If you can find a shop that has one of the $$$$$ snap on analyzers, it can tell you which cylinder....
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Old 03-26-2015, 10:24 AM   #11
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99% sure it's a coil as mentioned above... my 99 had the same symptoms. If you can find a shop that has one of the $$$$$ snap on analyzers, it can tell you which cylinder....
Thats how i figured out which cylinder it was because it wouldn't throw a code. But those scanners ain't cheap and most mom & pop shops don't have them so you might have to spend a pretty penny
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Old 03-26-2015, 11:08 AM   #12
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Thanks everyone for your comments I will take all of your advices.again Thank you.


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