Spark Plug Question?

Daew0Leganza · Post by **Daew0Leganza** » Tue Dec 30, 2003 12:40 am

Sticking with the Bosch Platinum 4+ on my Daewoo Leganza a good idea or upgraded to Denso Iridium Performance Racing Spark Plug?

Daew0Leganza · Post by **Daew0Leganza** » Tue Dec 30, 2003 3:34 pm

mocpac · Post by **mocpac** » Tue Dec 30, 2003 4:45 pm

I LIKE MOST THE NGK SPARKPLUGS

Daew0Leganza · Post by **Daew0Leganza** » Tue Dec 30, 2003 4:54 pm

Denso Iridium has patented technology and takes only 1 cycle to start up an engine, and it cost 11 bucks each

darkspeed415 · Post by **darkspeed415** » Mon Jan 26, 2004 2:46 am

even though you already have upgraded plugs, i heard it was bad to go from stock to such a powerful plug in one step. like stock to bosch +4

DomWoo · Post by **DomWoo** » Mon Jan 26, 2004 3:00 am

why would it be bad?? all it is a more powerful spark, maybe it wont have enough power to power it... so you get an ignition management unit to give you a more powerful spark, i personally wouldnt pay the price for P4's with P2's do the job the same. the only thing i see using P4's or anything of that type of plug would be something with a lot more horse power than a stock or slightly modified engine.

TheGreatAndPowerfulOz · Mon Jan 26, 2004 9:57 pm

darkspeed415 wrote:even though you already have upgraded plugs, i heard it was bad to go from stock to such a powerful plug in one step. like stock to bosch +4

Whomever you heard that from had NO idea about how an engine works.
With sprakling intelligence such as that, there is a good chance that they also believe the moon is made of cheese.

That is one of the funniest things I have read in the past few months!

A spark plug is only as powerful as the spark that is passing through it.

And do not ask why, because I can not answer, but NGK plugs seem to run the best in all of Korean & Japanese cars that I have worked on. Bosch platinum plugs made my Hyundai, Kia and Suzuki run terribly and even fouled the oxygen sensor on my Suzuki so the check engine light came on.

darkw00 · Post by **darkw00** » Mon Jan 26, 2004 10:12 pm

the ngk sparkplugs work great in my leganza

seattlelanos · Post by **seattlelanos** » Tue Jan 27, 2004 5:28 pm

I have +4 on my 01 Lanos and regret I ever spent money on them. If you go and read forums all over the internet on these plugs you will notice the same issue come up over and over: "THESE PLUGS DO NOT LAST". Many people agree that what bosch promises the consumer about their plugs lasting for 70K miles is absolutely not true. The platinum burns out too fast and your car looses power, miles per gallon, etc. Reason why I did my research is that I had the plugs for no more then 30K miles and noticed that my car has lost power during this time. I actually took the plugs out and cleaned them with a fine sand paper, which made a huge difference: my car can actually accelerate in 5th gear going 60mph, since before I had to go down to 4th gear. I talked to people and many really recommend the NGK-Rs, so I am planning to switch to those. I have never seen so much wear on a plug in 30K miles. NOT WORTH THE MONEY.

TheGreatAndPowerfulOz · Wed Jan 28, 2004 3:44 am

The Bosch plugs have different results in different engines.
With use in my various cars, I have seen the Bosch platinum plugs have worked best in my aircooled Porsche and aircooled Volkswagons. These plugs have lasted more than 100,000 miles with no problems or loss of power.

Post by **Efratech** » Wed Jan 28, 2004 3:34 pm

I had Bosch platimun plugs on my old 1.5 8v and they worked very well...

Daew0Leganza · Post by **Daew0Leganza** » Wed Jan 28, 2004 4:18 pm

i currently get 22mpg with the resistor mod and bosch 4+ and a catback exhaust system, if i change to denso iridium will my mpg's go up?

DomWoo · Post by **DomWoo** » Wed Jan 28, 2004 6:30 pm

i went and bought some NGK R's last night and going to swap them in place of the bosch Plat 2

we will see what kind of difference they make, as for the bosch didnt do much for me, in fact i thought it felt like i lost power, but it had better start and idle

here goes nothing..

DomWoo · Post by **DomWoo** » Wed Jan 28, 2004 7:54 pm

wow its damn cold out side...

anyways, i changed them out and drove around the block a few times then took it on the highway, and yeah there was a differnce, the sound of the engine was alot different, sounded more beefy, actually had power when taking off in 2 gear and when in 4 gear at 60mph.

after looking at the plugs, one looks really bad and the others look like they are in good shape, and they only had like 5k miles on them

i know that the woo needs a .044 gap, but how do you gap the platinum 2 & +4 plugs?? i know it says doesnt need to be gaped but they dont seem like they are anywhere near the .044

Daew0Leganza · Post by **Daew0Leganza** » Thu Jan 29, 2004 1:34 am

so do u like the the Bosch or NKG

The original daewootech forum

Spark Plug Question?

Spark Plug Question?

Bosch +4 -> BAD!