bigjwasup

i have a 94 gt 5o and i put autolite plugs in and new wires and i hear like a taping sound hears some one say its a spark knock what is that and what kind of plugs are good it had motorcraft in it before

1990NOS!

ngk--- thats all i've ever used in my car... they are about $2-$3 a pop... i run n20 so i have a cooler burning pug... for a typical street mustang i'd run a 8 or a 9 in it...

You didn't get platinum did you???

bigjwasup

no i did not get platiums the also has like a miss to all wires are right i checked thought it might be just ****y plugs

Stevens91gt

i bought the new E3's and i like them a lot
but they're pretty $$$

bigjwasup

have u guys heard of a spark knock before what is it

AdderMk2

autolite 25's will not give you spark knock. They are also one of the better plugs that you could have instaled.

Are you sure that you put them all in tight enough? Are you POSITIVE that you have the firing order correct?

bigjwasup

yea i rechecked them ant there tight car has a rough ldle like a miss

AdderMk2

youve probably got a cracked plug

1BIGMOFO

did you check the GAP???? Even tho they all say they are "pre gapped" by being shaken around in the boxes it changes the gap.. I would take them back out and check every gap to make sure its right on before yoou make any assumptions..

PJC Racing

Edit: My original statement was completely incorrect and I removed it to ensure that the information does not mislead anyone.

I would check with what Adder said, you mayhave acracked plug. Start the car in a dark area and check to see if you have spark where it should not be.