well i had a 0304 code for a while now and i have been reading all these pages on how other people fixed the knock sensor. at first i thought my hands where to big, but taking off the intake manifold was gonna be a pain go i jammed my hand in the little valley with a 12" WRENCH and got it out..and put it in the same way i got it out..

all with only a 12" WRENCH..haha

 

so...do 13 inch wrenches work too?

 

That's ONE BIG WRENCH THERE!

 

its not 12 inches its 12 mm wrench..hehe..sorry