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Old 04-19-2014, 12:45 PM   #1
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Spark plugs help??

So I changed my spark plugs yesterday, and afterwards my car ran perfectly, better than before, my MPG went up, the car felt brand new (76,XXX miles). Today however was different, my car was shaking a lot during take off, and my check engine light came on and won't go away. I checked all the boots and plugs, they were all sealed well, and my battery was plugged in fine. Any thoughts as to what is going on? Thanks!
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Old 04-19-2014, 01:04 PM   #2
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Did you check the gap on the new spark plugs? Even plugs that say they're pre-gapped should be checked. If the CEL is on, you should be able to pull a code off your ECU that'll point you in the right direction. Do you have a tuner or OBD2 reader? If not, AutoZone or any of those other auto parts store should be able to read the code for you.

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Old 04-19-2014, 01:39 PM   #3
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Originally Posted by WhoDat View Post
Did you check the gap on the new spark plugs? Even plugs that say they're pre-gapped should be checked. If the CEL is on, you should be able to pull a code off your ECU that'll point you in the right direction. Do you have a tuner or OBD2 reader? If not, AutoZone or any of those other auto parts store should be able to read the code for you.

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I did the system check through the ECU and they all check out fine. I'm trying to get a hold of a buddy of mine who might have a tuner, but I don't have any of those tools myself.
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Old 04-19-2014, 01:41 PM   #4
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Update: I had to move my car out of a driveway, and while doing so my car smelled like straight up gasoline, which it's never smelt like before. There's no leaks and nothing is wet, but the inside of my car smells like gasoline, and standing behind my car all it smells like is gasoline.
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Old 04-20-2014, 08:15 AM   #5
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Did u tighten the plugs really tight if not then they are skiping due to the plug or 1 broke while installing, if u bought motor craft plugs they can not b gapped for a 3v but just remove them n if they look black then they were not tight enough
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Old 04-21-2014, 08:40 PM   #6
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Did u remove your fuel rail for some reason? Even if you didn't you may have been leaning on one of your fuel rails and damaged an o ring. When you have your engine running check for any fuel spraying from one of the injectors. Good luck!
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Old 04-30-2014, 02:53 AM   #7
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Quote:
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Did u tighten the plugs really tight if not then they are skiping due to the plug or 1 broke while installing, if u bought motor craft plugs they can not b gapped for a 3v but just remove them n if they look black then they were not tight enough

The tuner said plugs 6 and 8 weren't tight enough, so I tightened them both and double checked the other ones and they were all tightened down well. Fixed the problem for about a day, then the problems arose again.
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Old 04-30-2014, 02:55 AM   #8
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Did u remove your fuel rail for some reason? Even if you didn't you may have been leaning on one of your fuel rails and damaged an o ring. When you have your engine running check for any fuel spraying from one of the injectors. Good luck!

All injectors except one were fine, I replaced the bad injector, but the car still runs like crap. The new injector helped a bit, but the car still doesn't run like it should.
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Old 04-30-2014, 03:24 AM   #9
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Hmm I know it may be a long shot, but have you changed your fuel filter? I believe 60K is the recommended mileage to change it.
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Old 04-30-2014, 03:25 AM   #10
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Hmm I know it may be a long shot, but have you changed your fuel filter? I believe 60K is the recommended mileage to change it.

Yeah, I changed the fuel filter the first day the problems started. It fixed the problem for about a day, then the problems arose again.
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