I am going to be replaceing my spark plugs but with what kind. do you rec. I was thinking about just putting the motorcraft back in but I don't know I am looking for some more high performance ones..
any help would be great, thanks
Allan

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1999 F150 Bright Red Extended Cab 4x4 Off Road, With Gray Interior, 5.4L, 3.73 Gears,

Add On's for now!
Access Tunnel Cover
Stainless Steel Nerf Bars
Stainless Steel Rocker Pannels
Putco Bed Rails
Clear Turn Signals
Flowmaster Exhaust
Lund Bug Guard
Painted Vent Shades
Painted Taillight Covers
Painted X-Cab Covers
Superchip (it's here and love it)
K&N Air Filter W/ Air Box Mod
Airaid FIPK (on order)
Red Stering Wheel Cover
Pionneer CD Deck

Wish List: F1 Ram Air Hood, Tinted Side Windows, Wiper Crawl, Viser, Supercharger, ETC...




[This message has been edited by MN99F150-1 (edited 05-17-2000).]

 

BOSCH PLATINUM PLUS 4'S.....

 

I agree with the +4 part (a racers trick), but not the platinum. Everybody's quick to jump on the platinum bandwagon. If the truck or any vehicle did not originally use platinum plugs I would stay with the factory style. I have seen platinum plugs do more harm than good on a motor that did not use platinum plugs from the factory. I do not know for sure if the plugs in our trucks are platinum or not, as I have yet to pull one (dreading that day from what I read).

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stock 98 XL, Reg. cab,4.6, Auto, HD cooling package, 255/70R16 on styled steel wheels,3.55LS, Black with chrome grille and bumpers! MODS: custom stereo by me, building speaker box was a !@#$%. K&N air filter w/ airbox mod, a complete keyless entry system.

 

97 and newer trucks use platinum plugs. Thats why they claim 100,000 miles before tune up. I also recommend the Bosch +4's.

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97 F-150 S/C 4x4 ORP XLT 4.6 K&N , Flowmaster w/dual tailpipes, Bosch+4 plugs,Ford 9mm wires,Superchip.Patriot fiberglass toneau cover, Westin chrome step bars. Rear seat lift 4".
Kenwood 4011 stereo, USAcoustics 2150 amp, Profile electronic 3 way crossover, 2 10" IDQ DVC's.

FUTURE STEREO MODS:
Memphis components in front, Pioneer 3ways in rear, amp for the components, and a cd changer.

FUTURE PERFORMANCE MODS:
4.10 gears, Edlebrock shocks, supercharger, Airaid, power pulleys.

OTHER FUTURE MODS:
Ram Air hood w/functional ram air, suspension lift, 16.5" polished wheels, 35" tires, and sunroof.

 

you guys who have switched to bosch plat 4 plugs please document mileage gains from--to--mpg..thanks, am considering switching.

 

I like the platinum advantage as well, but am not liking Motorcraft right now... I've gone through three sets of plugs in the past 65K miles (could also be shop-theivery, or some other problem. Although thorough testing hasn't indicated any components failing) in my Taurus.

But the Bosch 4's have the best technology available in spark plugs right now. Fancy stuff that.

Randy

 

I have the +4's and I personally noticed a smoother idle, but other than that it was just a $50 tuneup. I would recommend to anyone who is going to swap plugs to pull the wires and use compressed air to blow out the plug wells! I had a lot of dirt in the well of one of the plugs I pulled, so I blew the rest of them out before proceeding.

 

Yes go with the new Bosch Plugs. From what I read they are the new way to go. Good Luck

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Ronnie Wilson's F-150

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E-MAIL ME:
ruger-dfw@yahoo.com
My Home Page or Buy Amsoil Online
http://www.bigfoot.com/~ruger-dfw

 

Just a reminder to everybody. From what I have read, if it is time for new plugs, even the basic plug will return 3-5 hp that you had lost with widening plug gap. So its awfully hard to tell the difference between the fancy 4+ and the standard plugs at the time of change. Splitfire makes that claim: "gain 3-5 hp with our plugs". To be honest, almost every plug manufacturer in the world could make that claim.

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2000 F150 SC SB 4x4 XLT
Trition 4.6, 5 sp manual, Factory class III tow package, sliding rear window,
3.55 LS pumpkins, P255 70R16 slippery when wet Goodyear RT/S

Mods: Lund Deflecta-shield II, K & N filtercharger, Gibson 3" side swept cat back exhaust

 

Anyone notice any increase in MPG from the +4 plugs.

 

I got 15MPG normal driving and 11MPG pulling 3000# boat before the change and I still get 15 & 11. Glad I pulled out the stock though. The stocks were up to .020" over-gapped and a few of the plugs were rusted from standing water being in the plug well. I can't imagine that I am the only one who has seen this. Anyone else have rusted plugs and dirt in the plug wells?

 

Thanks all for the help I think that I will go with +4


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1999 F150 Bright Red Extended Cab 4x4 Off Road, With Gray Interior, 5.4L, 3.73 Gears,

Add On's for now!
Access Tunnel Cover
Stainless Steel Nerf Bars
Stainless Steel Rocker Pannels
Putco Bed Rails
Clear Turn Signals
Flowmaster Exhaust
Lund Bug Guard
Painted Vent Shades
Painted Taillight Covers
Painted X-Cab Covers
Superchip (on order)
K&N Air Filter W/ Air Box Mod
Airaid FIPK (on order)
Red Stering Wheel Cover
Pionneer CD Deck

Wish List: F1 Ram Air Hood, Tinted Side Windows, Wiper Crawl, Viser, Supercharger, ETC...