I just installed a new set of Bosch Iridium Fusion Spark Plugs into my 07' V6 yesterday. I am going to try and document my experience here for anyone else who may be interested i using them. i used this forum to research spark plugs, but was still left with facing the decision of "which one?" when I got to the store. I purchased these at Autozone for $7.99. There is a rebate of 2 dollars per spark plug on Bosch's website if you try them before I think Dec. of this year (2009).
Install was easy. I have noticed my low end reduce a littlle, but the mid to high seems smoother. I think there may be a burning in or adjustment time for me to really see what these do. With my current setup, I am at 60 miles after a quarter of a tank running 87 and no tune....I am at 38000 miles. Will check them after my next oil change in about 2000 miles.
welcome. i was running those for a while, and they were garbage....ha, just kidding. i think your gonna like them. i went back to some regular platinums playing with the gaps with the demon coil but i`m going back to the bosch when i get a chance to change them. heres the pics of the plugs and the numbers if anyone else wants to try them and post up.
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goina hundred in a 55, and i dont know why..
some things were just meant to be..
05 V6 auto, torch red, basic,:cool: a few mods
06 V6 stick, vista, premium (g/f`s car)
I ran the Platnum +4 for about 20k miles with MSD wires. Got 20 MPG city and 27 highway on 87 oct. Switched to Ir Fusions didn't notice any differance in performance or milage at all. With CIA and running sct 89 tune still 20 city 25 highway. 25k on these plugs and running smooth.
i have the two prongs, i like them alot and i did notice an ever so slight mpg improvement
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05 V6, 5 speed manuel, silver with black pinstripe, black rear and quarter window louvers, tail and headlight black outs, CAI, superchips tuner, true dual exhaust w/flowmasters, underdrive pulley, aluminum driveshaft, t-loc diff, michelin pilot sport tires, 18" black 10 spokes, polished aluminum pistol grip shifter, and still slow.
It my be my crrent setup, but 4000 miles later after installing the Bosch Platinum IR 4's, I have to say that they are now gone. I noticed my low end power continue to slip away and when I pulled them today, they had a fair amount of carbon buildup on the end. Went to the auto parts store and picked up the Motorcrafts that came with the car, and the low end is back and the car feels as powerful, (if not more so due to new plugs) as before. I heard that copper plugs have a hotter spark than platinum...maybe that is why the low end is back...
It my be my crrent setup, but 4000 miles later after installing the Bosch Platinum IR 4's, I have to say that they are now gone. I noticed my low end power continue to slip away and when I pulled them today, they had a fair amount of carbon buildup on the end. Went to the auto parts store and picked up the Motorcrafts that came with the car, and the low end is back and the car feels as powerful, (if not more so due to new plugs) as before. I heard that copper plugs have a hotter spark than platinum...maybe that is why the low end is back...
it may be your factory set up. mine are burning very very clean and there is no loss of power what so ever low end or high. if your all stock, they might not be the plug for you. keep in mind the performance parts and high octane are gonna make a difference.
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goina hundred in a 55, and i dont know why..
some things were just meant to be..
05 V6 auto, torch red, basic,:cool: a few mods
06 V6 stick, vista, premium (g/f`s car)
Bosch Ir Fusion Spark Plugs Experience 
. I am going to try these plugs when I do my next service in a couple of weeks.
