my trailing a fouling alot, and thats why the engine wouldnt start. when i replaced them with leading the engine was easy to start. i know that leading is a hoter plug, but can i run all 4 of them in my n/a? does timing have to be adjusted?

 

?

 

If I recall correctly, trailing plugs don't fire until 800RPM. Cranking RPM is about 250. So having fouled trailing plugs won't affect starting.

 

trailing fires at 250 rpm, belive me

 

unless you have them switched....

 

colder plug should amke it foul easier....

 

is it safe to run these plugs???????

 

Yeah, you can run them in all 4 holes. NAs run pretty rich to begin with.

But... I think you should trace down the actual problem instead of using a band-aid.

 

i use to run the bur9eq'a all 4. but i had some mods done to my s/4 na...
if your going to be in the higher rpms then get all 4 9eq's
if your shitt is fouling plugs , u should check compression almost guarantee u need a rebuild ASAP

 

How about a wild guess..Your Injectors are Dirty..Could be why you are havin a hard time starting your car..because of Excess fuel..and why your Plugs are Fouling.