Runs like crap after spark plug change Options

[95CelicaST]

Return that dual tip bosch garbage and get ngk platinum plugs.

[Spider77]

I thought this was all done and said with?

[Con99vert]

Yes, it has been taken care of. I returned the crap plugs and installed oem and everything is running good. Well...except for the ticking/knocking that I just posted about in another thread.

[DEATH]

I can not help myself but laugh at the many people who buy platinum and iridium sparkplugs for a car that has an ignition system set up for OEM plugs. Do your research people, those kinds of sparkplugs have too much resistance from the higher grade metals used, causing them to have a weaker spark (although they say to have a better and stronger spark). If you aren't sure what spark plugs to get, look in the freaking manual it's there for a reason!

I can not help but laugh at your statement.
1st off - OEM [Denso] are platinum plugs, I have looked in my manual and that backs it up as well.
2nd - Iridium plugs make a nice longer lasting upgrade. Do they make the car faster? No. But they will outlast the copper plugs by a long time.

BTW guys I have spoken with more than a few representative from both Denso and NGK and they all say the same thing - Denso and NGK are the same company and their spark plugs are identical. The whole point in having two brands is one is an OEM focused company that also sells in the aftermarket and the other is branded a "performance" aftermarket type - that's it.
I would never use Bosch plugs on my Celica - I and others have had too many problems with them - this thread is a good example.

[Bitter]

Denso and NGK are NOT the same company and have no holdings in each other nor do they share mutual owners.
Denso is part of Toyota in the same way that Delphi was part of GM.
NGK is is NGK, they have a sensor division NTK that makes Oxygen sensors, they have a ceramics arm which makes ceramics for electronics and electrical uses.

Neither company is involved with the other. I don't know why people think this, I did at one point but looked into it and there's nothing there.

[richee3]

^^ They may not be owned by the same people and their plugs may not be identical and rebranded, but I'd put money on it that they have the same suppliers and are using the same parts. Unless I have an application that requires a higher grade spark plug, I'll just put whatever's cheapest but works back in the car. In this case, Bosch plugs are known to have problems, NGK's are more expensive than Denso, so I'll just keep Denso platinum plugs in the Celica.

[DEATH]

Denso and NGK are NOT the same company and have no holdings in each other nor do they share mutual owners.
Denso is part of Toyota in the same way that Delphi was part of GM.
NGK is is NGK, they have a sensor division NTK that makes Oxygen sensors, they have a ceramics arm which makes ceramics for electronics and electrical uses.

Neither company is involved with the other. I don't know why people think this, I did at one point but looked into it and there's nothing there.

OK I got you - that's why their reps at the tracks and parts houses all say different right?
I think I'll listen to the guys who rep the products, thanks.
Listen the company I work for makes products for other brands too - and we don't publish that information because it goes against the agreements. But if a end user asks me outright I'm not gonna lie to him about it. That's bad for business. Get an NGK and a Denso plug next to each other - even the labeling is the same.
Believe what you want - I see no reason to continue this conversation.

[Bitter]

Ok, prove it. I'm not arguing, I'm stating fact. Prove that NGK is the performance division of Denso. It should be easy enough if you goto their english language corporate websites and goto the section that outlines the company. I'm sure that either one would make mention of that fact. Or perhaps they'd both have the same stock ticker number?

http://www.google.com/finance?client=ob&q=AMEX:NGK
http://www.google.com/finance?q=TYO:6902

Now, they're both publicly traded companies. So if one were owned by the other or simply a division of the other then that information would be public and have to be public.

Also, I don't know where you get the notion they use the same part numbering system...they number heat ranges differently.
A Denso K20R-U11
is a NGK BKR6ES-11

The heat range numbers used by spark plug manufacturers are not universal, by that we mean, a 10 heat range in Champion is not the same as a 10 heat range in NGK nor the same in Autolite. Some manufacturers numbering systems are opposite the other, for some manufacturers (Champion, Autolite, Splitfire and Bosch), the higher the number, the hotter the plug. For othe manufacturers (NGK and Denso), the higher the number, the colder the plug.

I could get a supplier to tell me that Autolite plugs are actually used in Nascar engines if he thought it would sell more ****. They're sales people and will say nearly anything to get sales.

http://www.globaldenso.com/en/products/aft...nce/1037_1.html
Yep, they number parts IDENTICALLY.

[DEATH]

I never said they part number things identically
I'm done with this discussion - I know what I know - you know what you know - who cares anyway?