Bosch + 4's
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Joined: Mar 2001
Posts: 4,506
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From: Puyallup, WA
Bosch + 4's
I installed these about a month ago, and decided to check them (well, one anyway). I pulled the #1. It has 2k miles since the change. Anyway, I've "heard" from other posts that these plugs run too hot or something and will burn a hole in the pistons. After looking at mine, it looked pretty darn good. Not overheated at all, which would have been indicated by it white instead of the nice tanish brown color it was. Looking at the center electrode, you could see little "spark" paths to each of the four electrodes (or whatever they are called) and each seemed to be equal, so all four are being used at some point, which I think helps divide up the work each of the four has to do.
I don't know if they are better then the Motorcrafts, but they aren't any worse, and so far see no evidence of them running too hot. Like I said, no real evidence yet, but it looks good so far.
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1997 F150 4x4 Off Road, SuperCab, Short Box, 5.4, Royal Blue/Silver, K&N, Gibson SS, LT265/75/16 Wild Country APT's
I don't know if they are better then the Motorcrafts, but they aren't any worse, and so far see no evidence of them running too hot. Like I said, no real evidence yet, but it looks good so far.
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1997 F150 4x4 Off Road, SuperCab, Short Box, 5.4, Royal Blue/Silver, K&N, Gibson SS, LT265/75/16 Wild Country APT's
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Joined: Feb 2001
Posts: 641
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From: Calgary, Oilberta
I run the regular Bosch platinums in my Acura. I find that there is always an occasional miss after installing them that goes away after about a week.
The first couple of times, I pulled them out and cleaned them, readjusted them but the problem still was there.
Now, I just wait for it to go away. After it clears up, they run great. My theory is that there is some sort of coating left over from the manufacturing process that has to burn off.
Ian
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99 Expedition EB
5.4l, 4x4, 4.10 LS
WMS Tube, Bassani Cat Back Exhaust, Superchip Flipchip, PIAA Superwhites
The first couple of times, I pulled them out and cleaned them, readjusted them but the problem still was there.
Now, I just wait for it to go away. After it clears up, they run great. My theory is that there is some sort of coating left over from the manufacturing process that has to burn off.
Ian
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99 Expedition EB
5.4l, 4x4, 4.10 LS
WMS Tube, Bassani Cat Back Exhaust, Superchip Flipchip, PIAA Superwhites
Thread Starter
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Senior Member
Joined: Mar 2001
Posts: 4,506
Likes: 6
From: Puyallup, WA
<font face="Verdana, Arial" size="2">Originally posted by Ian N:
I run the regular Bosch platinums in my Acura. I find that there is always an occasional miss after installing them that goes away after about a week.
The first couple of times, I pulled them out and cleaned them, readjusted them but the problem still was there.
Now, I just wait for it to go away. After it clears up, they run great. My theory is that there is some sort of coating left over from the manufacturing process that has to burn off.
Ian
</font>
I run the regular Bosch platinums in my Acura. I find that there is always an occasional miss after installing them that goes away after about a week.
The first couple of times, I pulled them out and cleaned them, readjusted them but the problem still was there.
Now, I just wait for it to go away. After it clears up, they run great. My theory is that there is some sort of coating left over from the manufacturing process that has to burn off.
Ian
</font>
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1997 F150 4x4 Off Road, SuperCab, Short Box, 5.4, Royal Blue/Silver, K&N, Gibson SS, LT265/75/16 Wild Country APT's