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Author
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Topic: Odd Issue...Please Read
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Teddy Tiger
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Member # 2473
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posted
 
 
Something odd is happening with my car, ever since I swapped in a new set of stock Motorcraft Double platinum plugs...I didn't change the wires 'cause I figured they'd be okay...
When I first fired it, it had a misfire that set a code...I reset it, and it seemed to run okay, but then, it would start acting like it was misfiring *slightly* above 3000 rpm under load...not totally misfiring, but enough that it vibrates noticibly under hard acceleration - deceleration...
Anyone have an idea? Hopefully it's just a wire breaking down from the increased voltage from firing new plugs...
It didn't happen with the old plugs, either.
Help!
Nick
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2008 Mustang GT 'Premium'
Vista Blue Metallic
Interior Upgrade, Comfort Group
Charcoal Leather Interior
Shaker 500 Stereo
Posts: 167 | From: Lafayette, California | Registered: Feb 2003
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JoeT
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Member # 298
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posted
hate to say it, platinum plugs=crap. I'm sure some cars can run with them, but nothing I've ever owned except for my wife's Infiniti.
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1984 Ford Tempo AOD--- RIP
Posts: 6785 | From: San Jose | Registered: Jun 2001
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FasterDamnit
Bad Attitude
Member # 442
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posted
Don't be cheap.
Tune-up= Plugs, wires, cap, rotor, fuel filter, PCV valve, air filter. Prolly forgot something.
With the ignition system just doing one part is begging for problems...
Posts: 2971 | From: NorCal | Registered: Sep 2001
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hidnn.o.s.
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Member # 1219
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posted
I would LOSE the platinum plugs and just toss in a set of Autolites and new wires. Your problem resides in one of the two most likely. Get a fresh start.
Platinum is just a waste of money on your car and double platinum is a waste of DOUBLE THE MONEY.
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R.I.P. Willie G. You are missed on this forum
Posts: 15950 | Registered: Apr 2002
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Teddy Tiger
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Member # 2473
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posted
Yah, I ditched the platinums for something different already, yesterday, still have the same problem.
Hopefully when we throw it on the 'scope monday at School, we'll see if it's a wire that's breaking down..I *really* hope it's that, and not mechanical with that engine.
Nick
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2008 Mustang GT 'Premium'
Vista Blue Metallic
Interior Upgrade, Comfort Group
Charcoal Leather Interior
Shaker 500 Stereo
Posts: 167 | From: Lafayette, California | Registered: Feb 2003
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stoauto
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Member # 2803
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posted
i would just buy new wires anyway, like said above, dont be cheap.
Posts: 1054 | Registered: May 2003
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Teddy Tiger
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Member # 2473
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posted
quote:
Originally posted by FasterDamnit:
Don't be cheap.
Tune-up= Plugs, wires, cap, rotor, fuel filter, PCV valve, air filter. Prolly forgot something.
With the ignition system just doing one part is begging for problems...
4.6 with Coilpacks, no cap / rotor...fuel filter had been changed too not too long ago, air filter is a K&N...gonna have them put it on a Five-Gas too, see if it's fuel related.
Nick
Posts: 167 | From: Lafayette, California | Registered: Feb 2003
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RedBaron
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Member # 4361
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posted
Speaking with the experiences dating back to the old 'Splitfire' spark plugs, I'd say go to ford and get the plugs called for by the factory- all the platinum, rhodium, unobtainium, and 'spend-more-money-um' plugs out there lead to nothing but trouble!!! Near as I can tell, the factory boys tune the ignition set up to a particular plug's resistance- standard plugs have a different resistance than the 'Gee wow' plugs.
Start with a plug swap to good quality stock plugs and see what happens- and don't forget to return the platinum pieces of crap for a refund!
P.S. the tech magazines have been recommending to resistance test all your plugs with a DVOM (Multi meter)- the new OBD II cars are starting to have misfire codes due to resistance variance in the plugs!! make sure the plugs are all within @ 5% of each other-
Posts: 830 | From: S.S.F. | Registered: Apr 2004
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