HI!... Well guys I now have 53,000kms on my truck and have decided to finally change my sparkplugs. I would like to buy the BOSCH PLATINUM +4 sparkplugs, but every where I go they tell me there is no such plug for the "99" 5.4 yet! I know some of you guys with the 5.4 have got these plugs. So would you be so kind to list the part # for them. And tell me how you like, or disliked them after you installed them.

THANKS - NEAL "the h.p freak"

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NEAL [ the horsepower freak ] NEWMAN
'99' F-150 XLT SPORT, oxford white, reg cab shortbox stepside,5.4, auto, 4.10L.S, captain's chairs, bedliner, GTS carbon fiber headlight covers, ***** CEPECK clear halogen driving lights, GTS slotted tailight covers (painted oxford white), FORD locking lug nuts, tinted windows,true duel exhaust with 2.5 inch mandrel bent pipes and FLOWMASTER 3 chamber mufflers with 3' tailpipes exiting before the rear wheel like the LIGHTNING, HELLWIG rear stabalizer bar, 3 AUTOMETER guage pods, filled with tranny temp, engine temp, and oil preasure AUTOMETER "PHANTOM" guages,custom fabricated air intake trac and huge K/N filter, TPS mod, BELLTECH 2-inch rear drop, custom programed SUPERCHIP, modified POWERAID spacer, BAUMANN ENGINEERING shift kit (on stage 5 setting)BYPASS CLUTCH CONTROL VALVE/PREASURE REGULATOR VALVE, ASP POWER PULLEYS, custom tig welded and ported JBA "JET BLACK coated headers, twin DERALE 16 INCH ELECTRIC FANS, PERMA COOL 14"/10" tranny cooler with 10" electric fan. FUTURE MODS : FORD SVT 24LB INJECTORS, BBK 75MM THROTTLE BODY, AADI F1 RAM AIR HOOD, traction bars, and a KENNE BELL BLOWZILLA supercharger.
ESTIMATED H.P TO DATE : 345H.P / 425ft/lbs of torque.

OTHER TOYS : "83" PRO STREET FORD RANGER : 351-w stroked to 408c.i 625H.P (natural), 875H.P with 250H.P "BIG SHOT" N.O.S kit, tubbed (crome moly tubing), 12 point chrome moly roll cage, 4-link with coil overs, MUSTANG II front suspension, c-4 tranny (race prepped), 4000rpm stall converter(8 INCH), 3" chrome moly driveshaft,AUTOMETER guages, 15.50 MICKEY THOMPSON rear tires, 4" M/T front tires, CENTERLINE CON-VO PRO rims, fiberglass hood - bumper - prostock hood scoop, wishbone trac-link, two chrome moly driveshaft loops, 16 gallon RCI fuel cell,etc

 

HI!... TOP

 

I don't know the part number for the 5.4l off hand, but I have put those plugs in other vehicles and I would say, don't waste your time. They do nothing for performance or gas mileage. I even noticed a rougher idle with those plugs.

Huge waste of money if you ask me.

 

If it were not such a pain in the butt to change them more often, the best plug you could put in this truck is a copper core plug. Platinum doesn't conduct for crap and causes hotspots in your cylinders, pinging, poor performance. The reason they last so long is because they don't conduct!

 

Neal,

4459 Bosch plat's

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2000 F-150, S/C F/S 5.4lt Auto, 3.55 LS, M4x4, Capt. Chairs 6 way elec., 6 CD,Class III towing hitch and package, etc,etc,.
Med Toreador Red
Born 03-27-00
Mods,
Superchip UAT2,Borla Anniversary Edition Split rear catback,K&NGen II or FIPK, BBK Trottle Body,Granattely Mass Air Flow,SVT Lightning 18" wheels,285/60/18 Pirelli Scorpion Zero,HellwigSway bar,Dark Walnut dash kit,Muth signal mirrors,White face gauge,Bosch Plat. 4's,Retrax Rolltop,Outland sport bumper guard,Rancho rsx shocks,Ford OEM bug deflector,Underhood sound insulation panel,Piaa Plat. super white Bulbs,Catch All floor mats,Lund Back Draft tailgate spoiler

 

Dont waste your money on the +4s.

I had them in a 4.0L ranger and beyond starting quicker, did nothing for performance or milage. When I removed them, 4 out of 6 were only sparking to one electrode.

WASTE OF MONEY

 

Has anyone successfully changed the rear plugs on the 5.4?
I got 5 of them changed last night but it looks like I need to remove the fuel rail to access the back 1 on the passenger side and the back 2 on the drivers side.
If anyone has any tips on what you've done Id like to know.
Disassembling all that junk will turn it into a all day project