I put Bosch platinum 4 spark plugs in my car the other day and I was advised the next day by the guy at autozone that these plugs will just give me problems. Anyone have any ideas or comments on this? I paid to much to just wanna yank them out. Seems like he would have told me this before I bought them.

 

Yank them out, you should never EVER buy BOSCH plugs!!!! NEVER EVER! Those 4 PRONG PLUGS are not made for our engines they are JUNK!!!!!!!!! Yank them out.

I highly recommend using AC DELCO RAPIDFIRE spark plugs. they sell them at PEP BOYS.

Don't use AUTOLITE either.

 

Junk, pull them and toss them as far as you can into the neighbors yard

These engines like the no-name 'bottom of the barrel plugs' like the champion coppers or delco plugs.

 

Bosch=European/german cars

AC Delco=Chevy

Just get the cheapo copper tipped AC Delco.

 

They will give you nothing but problems unless you have an upgrade ignition (MSD, etc). They fouled in my truck after 2 weeks of driving!

 

Thanks for the advice I will yank them out tonight. Are champion plugs any good?

 

I use Bosch in my Land Rover with no problem. I personally have had no problem with them in any of my cars. I have heard that american cars just do not like them. If you pull them out and contact Bosch, they will pay for the plugs. +4 plugs only have a real use in Hondas and imports. The spark won't split four ways,it will just go to the closest point. Good Luck

 

and let me guess ngk are for asians right?


mind if I ask what the difference is and how the motor would know the difference?

 

Bosch stuff is just crap in general. They use the screw-off terminals as well, which can back off and cause serious igntion problems. A/C delco or any reputable plug with a standard electrode and solid terminal is the way to go. If it has funky electrodes or screw-on terminals, pass for something else.

 

[QUOTE=rx7speed;3242149]and let me guess ngk are for asians right?
QUOTE]
NGK are manufactured in 7 US states and are one of GM's top suppliers

 

Well, there ya go. That explains everything!

I couldn't resist digging up some priceless posts I remembered from the past regarding this topic. It's been beaten to death.

Just like with ANY brand, part or product, there are people who've posted they've had no problems with the +4s, and there are some who've posted they have had problems with them. So just use whatever you feel like trying or spending your money on, and you'll likely be just fine.

And because you've already got them installed, you might as well leave 'em in there, at least, for now. I don't think you can return them anyway, can you?

 

I like Vader's remarks the best, I can almost understand it.

 

Im gonna yank them, I was cruising around this afternoon and it felt like it was missing. im just gonna put some plain old champions in.

 

I was at my local chevy dealer this wkend looking for rapidfire plugs and they said not to bother that they were not holding up so Idecided to go with the delco platinum 41-905.

 

I don't understand, why don't you just use AC DELCO SPARK PLUGS!!!???

 

Thats what happened to mine as well... Started missing, and got worse.

From reading the other threads it seems that the people who had good results with those plugs also had high voltage aftermarket coils. I don't think our stock coil works well with those plugs.

 

I am looking to upgrade to super hei do you think these plugs will work better with that?

 

Don't ever use any multiple electrode spark plug. They do nothing but lighten your wallet and make you buy more Tylenol (Advil if you are German/Japanese).

Platinum or Iridium plugs are not a bad idea, as they can potentially outlast the copper plugs by quite a bit, but only the single electrode versions.

 

in itself I don't see what is so bad about multigap plugs as that is what comes on my rx7 right now. they come in two versions either a full ring around the center electrode or the other style is like the full ring around it but it has four little grooves making it like a multi ground plug. they seem to work ok and last. so I wonder what the difference is between these NGK's and the bosch plugs.

though I know when I used the bosh in my camaro it worked great for a week then fouled out.

 

Last i checked their was never a rotary engine under the hood of my camaro or any other...

My old 350 didnt like the 'normal' bosch platinums with the single electrode. Chucked them and bought some NGKs. Currently running Delco's in the new 350.

 

that may be but I dont really know if it is a problem with the multi electrode itself I just know at least that the bosch version sucks

 

those rx7 use some pretty funky looking plugs
almays thought rotary engines were kind of cool was going to put one in my s10
but as far as those +4 had a friendput them in his ranger the 4cyl that has 8 plugs and ended up frying out all his coil packs in 2 days
ever since then i wouldnt recommend them (an i work at a parts store)

just my .02

 

ill go out on a limb and say that it has something to do with the way bosh makes them or the quality or materials. Come to think of it, no mater what style of bosch plug or the application, i dont recall anyone being overy happy with them...

 

I changed the plugs and wires and now she runs great. Thanks for the help.

 

the reason the bosch plugs aren't any good is because the tips are not directly above the electrodes like a regular plug, which causes the spark to "arc" over to the tips

 

um yes all spark plugs arc that is the point of them... helps ignite the fuel/air mixture...without that you would have a really expensive gas pump..

 

Cutting back the electrode has been a motorcycle power added for a long time. The resulting spark is a lot hotter, but the plugs don't last as long.

 

Which part goes first, ground strap, or electrode, or both?
Does that apply to platium types as well? I would think platium, and iridium would last longer even if the strap is trimmed.

 

The excess wear is evident on both... I never ran them long enough to find out which fails first. The plugs for my bike were so cheap I changed them often.

 

I believe platinum has a little more electrical resistance than iron does too, so it takes more spark energy to fire a platinum plug, add a old ignition system and a little oil burning to the mix and you could have problems.