Are the Bosch +2 spark plugs good I've read about the +4, but are the +2 ok, are they better thank stock??
also you don't gap them right??
can my stock wires work?? or do I need others
thanks

 

When doing plugs it is best to do wires too.
Your stock wires will work with any spark plug.
The +2 is better than a standard plug.
I used Denso Iridium spark plugs.

 

I use Magnacore 8mm wires and Bosch Fusions.. Awesome set up..

 

I used Bosch +2 with good results until my factory wires gave out on me. In my desperation to fix the misfires I replaced the wires with Magnecor 8mm's and the +2's with factory Champions. I know now the wires were causing the problem and not the plugs. I plan to switch back to the +2 plugs tomorrow. The engine ran smoother with those plugs.

Cheers,

Pete

 

I run thje 8 mm Magnacor wire, a real must, I put 65,000 on some Plus 4's with great results and then switched to the Fusions, the jury is still out on the Fusions. They work well, I just don't know if they are worth the extra over the Plus 4's.

 

I have used Bosch +4's and found that in my Disco I they fouled out.
So I use the OEM Champion RN12YC,,,,at a $1.50 its the only thing cheap on
a Rover.

 

Landzu,
Did you instyall Mahnacor wires when installing the Plus 4's? If not that was your problem, they need that extra voltage the factory wires can't give.

 

I have used Magnacores for years before that I have used OEM wires.
The electrode on the +4's is so small that on a Disco I(mine) any carbon can
impair the plug.
Before that I had used OEM plugs or Champion's.
I had the Bosch +4's in for about a year then I had one foul bad,,,it gave no
warning.
They are not bad,, but I could tell no difference from the Champions to the Bosch
so for the money I can change the Champion out every year and keep the motor
running top notch.

 

I just installed Magnacor 8mm wires and now I'm trying to decide which plugs to run, currently has bosch platinums in there. My opinion of any 4 electrode plug is that they have a 1 in 4 chance of being in the 'sweet spot' position and a 1 in 4 chance each firing cycle the spark will jump in that position since electricity follows the path of least resistance.

 

Yes that looks like it would work,,,,,,,,,,until you
look at the eletrode its the size of a pin head and thats the part that
fouled out on mine.