Welcome to Mustang Evolution.
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03-05-2007, 12:39 AM
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#1
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Will these even work?(spark plugs)
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^needs more bondo
Join Date: Sep 2003
City: Modesto
State: California
Posts: 9,629
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been doing some basic maint on the GT for spring, picked up some bosch plats but i think they gave me the wrong set, check out the thread difference, the bosch ones have double. im no sparkplugologist, but i dont think these are gonna work. btw the bosch ones are the new looking ones on top.
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-Thomas-
2003 Redfire Cobra - 448whp/435wtq 
1990 Eclipse GSX - Sold 
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03-05-2007, 12:40 AM
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#2
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Re: Will these even work?(spark plugs)
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LS THIS
Join Date: May 2006
City: bristol
State: Tennessee
Posts: 523
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No clue man all i run is ngk tr6's. |
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03-05-2007, 12:44 AM
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#3
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Re: Will these even work?(spark plugs)
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^needs more bondo
Join Date: Sep 2003
City: Modesto
State: California
Posts: 9,629
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yeah i usually do too, but they had only 6 ngk's, IMO most of the auto stores are always "two plugs short of a full tuneup"
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-Thomas-
2003 Redfire Cobra - 448whp/435wtq
1990 Eclipse GSX - Sold
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03-05-2007, 12:49 AM
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#4
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Re: Will these even work?(spark plugs)
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LS THIS
Join Date: May 2006
City: bristol
State: Tennessee
Posts: 523
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I went out too the garage and got one of my old plugs and mine has 10 threads if that will help you any? i couldn't zoom in on your picture enough to check those. |
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03-05-2007, 12:53 AM
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#5
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Re: Will these even work?(spark plugs)
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^needs more bondo
Join Date: Sep 2003
City: Modesto
State: California
Posts: 9,629
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the ones that came out of the car are motorcraft AWSF 32PM's and they have ~6 threads, the replacement Bosch HR9DPY have ~10 threads.
perhaps they are correct?
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-Thomas-
2003 Redfire Cobra - 448whp/435wtq
1990 Eclipse GSX - Sold
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03-05-2007, 12:57 AM
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#6
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Re: Will these even work?(spark plugs)
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LS THIS
Join Date: May 2006
City: bristol
State: Tennessee
Posts: 523
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I think its just different plug design but it's better too be safe than sorry.Just call a dealer tommorow and make sure. |
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03-05-2007, 01:00 AM
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#7
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Re: Will these even work?(spark plugs)
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You want to **** me?
Join Date: Jun 2003
City: Kansas City
State: Missouri
Posts: 12,414
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They'll work, just dont overtighten them into the head
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-Mike
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03-05-2007, 02:08 AM
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#8
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Re: Will these even work?(spark plugs)
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^needs more bondo
Join Date: Sep 2003
City: Modesto
State: California
Posts: 9,629
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hmm well i installed them, now the idle is really "defined" i can hear each individual pulse through the exhaust, and its really "choppy" feeling between 1-2k when accelerating, and it feels really slow. im wondering if this is how the car is supposed to feel and ive been jipped?
im gonna drive it to work tomorrow and if it feels the same im gonna put the other ones back in and see if those make it better, if they do, ill scrap these bosch and find some NGK TR6's.
__________________
-Thomas-
2003 Redfire Cobra - 448whp/435wtq
1990 Eclipse GSX - Sold
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03-05-2007, 07:14 AM
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#9
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Re: Will these even work?(spark plugs)
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Mustang Evo NEWB
Join Date: Aug 2004
City: millville
State: New Jersey
Posts: 4,975
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could be a severely wrong heat range, coil might not be pressed on all the way, etc.. If your car ran better before than it does now, I really doubt that's how the car was supposed to act... mine always felt slow  but it was never choppy...
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1992 Mustang LX hatchback.. 1 of 542 black on black
2003 Regal GS - the beater/daily driver - somewhat stock. No its not a mustang, at least it's blown.
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03-05-2007, 12:14 PM
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#10
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Re: Will these even work?(spark plugs)
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LS THIS
Join Date: May 2006
City: bristol
State: Tennessee
Posts: 523
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Is your car boosted or sprayed if its not i suggest ngk tr5's. |
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03-05-2007, 12:19 PM
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#11
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Re: Will these even work?(spark plugs)
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^needs more bondo
Join Date: Sep 2003
City: Modesto
State: California
Posts: 9,629
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just hopes and dreams my good man
prolly just stick some motorcrafts in there.
__________________
-Thomas-
2003 Redfire Cobra - 448whp/435wtq
1990 Eclipse GSX - Sold
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03-05-2007, 08:01 PM
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#12
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Re: Will these even work?(spark plugs)
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Registered User
Join Date: Dec 2005
City: maryville
State: Tennessee
Posts: 74
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always heard bosch is crap for mustangs anyway. ran some in mine awhile back, did same thing you talked about. felt sluggish. put motorcrafts back in. |
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03-05-2007, 11:40 PM
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#13
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Re: Will these even work?(spark plugs)
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^needs more bondo
Join Date: Sep 2003
City: Modesto
State: California
Posts: 9,629
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Wow
picked up some NGK TR55's and yeah, much better. uber smooth.
__________________
-Thomas-
2003 Redfire Cobra - 448whp/435wtq
1990 Eclipse GSX - Sold
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03-05-2007, 11:52 PM
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#14
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Re: Will these even work?(spark plugs)
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LS THIS
Join Date: May 2006
City: bristol
State: Tennessee
Posts: 523
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I love ngk's they are cheap work great in my opinion. |
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03-06-2007, 02:05 AM
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#15
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Re: Will these even work?(spark plugs)
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^needs more bondo
Join Date: Sep 2003
City: Modesto
State: California
Posts: 9,629
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its sad that there is such a difference, i mean, people actually use bosch in cars and think they are good? its amazing such a garbage product can even be sold, i mean hell, i have a v8 and even i felt a major loss of power, i could only imagine what these would have done in the girls vw bug or the like, wouldve been even more gutless than it is.
from now on, the 1 hour it takes to hunt down the proper plugs will be the only option.
__________________
-Thomas-
2003 Redfire Cobra - 448whp/435wtq
1990 Eclipse GSX - Sold
Last edited by Thomas91169; 03-06-2007 at 02:08 AM..
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03-06-2007, 02:10 AM
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#16
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Re: Will these even work?(spark plugs)
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LS THIS
Join Date: May 2006
City: bristol
State: Tennessee
Posts: 523
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Do what i did because yes its a pain in the ass too find tr6's or tr5's buy alot at once i have 16 tr6's now not counting the new ones in my car. |
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03-06-2007, 03:26 AM
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#17
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Re: Will these even work?(spark plugs)
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^needs more bondo
Join Date: Sep 2003
City: Modesto
State: California
Posts: 9,629
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lol id lose them, a year from now be like "wtf whered i put those fuckers!" and have to buy more anyways.
__________________
-Thomas-
2003 Redfire Cobra - 448whp/435wtq
1990 Eclipse GSX - Sold
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03-07-2007, 02:25 AM
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#18
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Re: Will these even work?(spark plugs)
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The Internet Badass
Join Date: Feb 2007
City: St Louis
State: Missouri
Posts: 1,359
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If you look at where the seat on the plug is they are in the same place so you wont have a problem with them except they are junk plugs
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03 GT silver, BBK intake, March underdrive crank pulley, Spec tage2 clutch, Spec lightweight flywheel, Pypes catless x-pipe, short throw shifter, and Cobra wheels.
Flogging Molly- Ya drank with demons straight form Hell They almost nearly won as well Ya wiped the floor with victory Then puked until you fell asleep.
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03-15-2007, 08:14 PM
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#19
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Re: Will these even work?(spark plugs)
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Beast
Join Date: Dec 2005
City: Gulf Breeze
State: Florida
Posts: 20
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Did you find out if they would fit? I would've just looked up the numbers on advanced auto or autozone website to see which bosch's fit the car and compare it too what was on the spark plugs. I ran Bosch Plat. 2's on my old car it ran pretty good. Never run Bosch Plat 4's though unless you have a highly modded engine cause they'll heat up too quick and burn! |
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03-17-2007, 01:16 AM
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#20
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Re: Will these even work?(spark plugs)
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ME hometown supporter
Join Date: Feb 2005
City: Harvest
State: Alabama
Posts: 971
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not sure which plugs the 4-6ers like the most, but for 3.8's and 5.0's regular old copper autolights are the best, ask your turner. they'll tell you.
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5.4 liters of pushrod 
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