How many miles have you gotten out of your plugs after changing them? specifically the PZT1F SP-462 plugs.

i have put 43,000 miles on these plugs since I replaced them 2 years ago and am now tracing down a popping during acceleration. Plugs are the last thing I want to change...again.

Have replaced the cats and front O2's, working on testing the injectors (going to throw them on the flow bench and in the ultrasonic cleaner, also bought a new one to compare the old ones to). If the injectors check out I will do coils next, then the plugs...unless people have been getting poor miles out of them.


Meant to change the title to "Have your replaced plugs gone bad?" but not too worried about it, but if a mod wants to change it go ahead

 

I changed mine at about 50k. The longer they are in there, the harder they are to take out.

 

Not what I meant. Asking if anyone has one foul or just wear out after replacing the original ones. Not if they are hard to get out

 

They have been replaced with SP-507 (single platinum) and SP-515 (double platinum). Change them.

 

OK might as well just go for it I guess

 

looks like I am doing spark plugs on saturday, just bought a set of sp515 from advance auto, 2 day shipping for a total of $64.33