Whats wrong with this d@#! thing? - Mustang Evolution

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Old 04-27-2013, 04:33 PM   #1
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Whats wrong with this d@#! thing?

Here's a couple videos. When I accelerate it makes a shuttering/ missing sound, yet when I got home and it was in park it didn't do it. It was soaking wet out side, and I did oft some Marvel Mystery Oil in it last fill up. Could it be the additive fouling the plugs? Or could water be getting somewhere and messing it up?

---------- Post added at 03:33 PM ---------- Previous post was at 03:32 PM ----------

So I can't ad videos? I'll upload them to YouTube and link them.
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Old 04-27-2013, 04:54 PM   #2
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Here:
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Old 04-27-2013, 07:02 PM   #3
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That can't be good.
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Old 04-27-2013, 07:19 PM   #4
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Well I figure that, but I need to know what's wrong so I can fix it.
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Old 04-27-2013, 07:21 PM   #5
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Likely a wire arcing out or a bad plug.
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Old 04-27-2013, 09:55 PM   #6
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I'm hoping that its the plugs so I can just replace them.
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Old 04-27-2013, 10:10 PM   #7
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I'm hoping that its the plugs so I can just replace them.
Pull them and check, it's the only way to tell.
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Old 04-28-2013, 02:05 AM   #8
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Pull them and check, it's the only way to tell.
If you have a cold air intake you may have sucked up some water mine did and luckily it didn't mess any thing up but it ran like crap when I got on it
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Old 04-28-2013, 07:27 AM   #9
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I don't think it's that, it would make since, but it has the stock air box. I'll check and see if the filter is wet.
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Old 04-28-2013, 09:19 AM   #10
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Sounds like the engine is misfiring. When was the last time it was tuned up?
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Old 04-28-2013, 10:21 AM   #11
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I have no idea. It isn't doing it today. Hopefully it'll just sell.
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Old 04-28-2013, 12:03 PM   #12
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I would do the plug check first, make sure a plug isn't fouled and see how the plugs are burning or if it's firing on all 8 cylinders.
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Old 04-28-2013, 12:23 PM   #13
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Does it run fine unless you get on it a bit?
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Old 04-28-2013, 12:41 PM   #14
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It was fine under 2000 rpm but over it started that.
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Old 04-28-2013, 02:17 PM   #15
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I would just check the plugs and make sure you don't have any torn/burnt plug wires. How long since its had a tune up?
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Old 04-30-2013, 01:54 AM   #16
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How long has it been for a cp rotor plugs and wires?
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Old 04-30-2013, 02:19 AM   #17
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Hmm sounds like maybe your advance timing is bad
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Old 04-30-2013, 09:51 AM   #18
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I have no idea how long it has been since it has had a tune up or anything. I bought it about 8 months ago and have driven it everyday. I think it sat for about 5-6 years before I bought it though. It hasn't done that since then so I think that the plugs where fowled up or something, if I wasn't trying to sale it I would go through it and replace everything.

On a unrelated note; would anyone like to buy a 1987 Mustang GT, t-tops, auto?
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Old 04-30-2013, 12:46 PM   #19
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Damn man I hope for the best, sorry she's not doing so well .... Do you know anybody you trust that can check her out for you ?
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Old 04-30-2013, 01:19 PM   #20
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Likely a wire arcing out or a bad plug.
Or hairline crack in the distributor
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Old 04-30-2013, 01:27 PM   #21
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Selling it misfiring won't get you the money you deserve. A misfiring engine can be very dangerous. Whatever cylinder that's misfiring is dumping unburnt fuel in to the catalytic converter. If enou fuel gets to the cat, it can and will explode whil you are driving. Happened to a friend of mine. His car was totaled over a misfire. (if a misfire is your issue, no telling til you pull the plugs) A tune up doesn't cost very much compared to the loss of value for mechanical issues. More than likely it will cost you less than $200
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Old 04-30-2013, 02:45 PM   #22
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An it's a positive selling point. Buyers like to know that it's well maintained. You telling them that you just changed the fluids and did a tune up with new wires, plugs, cap, and rotor, that'll make them feel better about buying.
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Old 04-30-2013, 09:04 PM   #23
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Your all right. It isn't any more though. It also needs a wheel bearing.
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Old 05-01-2013, 08:47 PM   #24
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Did you say it does it just when its wet out or all the time? If it does it just on damp mornings or rainy days I would almost guarantee a ignition wire issue or cap/rotor issue. So then you will need a tune up.
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