NGK Plugs

[V10 MOJO]

i just put in a set of NGK plugs, decided to then take this bucket for a spin; this thing is spitting, backfiring and popping like a ******? this normal for NGKs? i wouldnt think so but figured id ask around befroe returning to champions.

reason i switched is i need a colder plug

sure hope i didnt just waste twenty minutes of my life putting these things in

 

[Doug Supercharged Vipers]

*Go back and recheck your firing order !!!
Not normal for NGK plugs. Unless you went to the "extreme" cold plug.

Regards,
Doug

 

[99 R/T 10]

Mojo, you crossed a wire....................... dude! Now go back ther ein the garage and fix that poor thing. Good thing for you that Doug is watching your back

 

[V10 MOJO]

nope didnt cross a wire, ive checked them three times. maybe pulled one off a coil? ill check that tommorrow.

as for the type; i used ngk R5671A-7 gapped at 35

 

[V10 MOJO]

BTW, i should mention that the spitting and popping is primarily upon deceleration

 

[99 R/T 10]

Did you take out the cats?

 

[Doug Supercharged Vipers]

i used ngk R5671A-7 gapped at 35

The R5671A-7 is a non-projected colder plug. A good selection for medium compression engines. If you can, lift the hood at night....in total darkness and look for spark arcing "if" you suspect a problem. May just be the reaction to the colder plug.

 

[FE 065]

Did you break the porcelain on one of the plugs ?

 

[Jack B]

FR5-1 is the right plug, Summit has them in stock. Why a colder plug. If it is happening under deacceleration (high vacuum), unburned gas is getting into the exhaust system. There is a plug that is not firing.

 

[joe117]

Why do you think you need a colder plug?

Why would you change from the stock Champion?