I was wondering how many miles should you change your spark plugs? I have a d16y7 with some bolt-ons and i know its been over 7000 miles since i replaced them.

Also...

Is it normal to have your shifter to vibrate a lot when you modify your motor with like headers, intake, exhaust, shifter bushings etc.
My car seems to have an irratic idel but every shop says its fine, what could cause this, what should i do to have a smoother idel?

 

What does your maintenance book say? I do mine about every 30K.

 

every 30k or there abouts.

 

I change my plugs every 10K milels. Dont know what the books says but thats how i do mine.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94_HATCH &raquo;</TD></TR><TR><TD CLASS="quote">I change my plugs every 10K milels. Dont know what the books says but thats how i do mine.</TD></TR></TABLE>
i believe the book says every 30k miles.

 

60k 99si

 

hm either you dont drive enough, or you just change them very late.
you're supposed to change them every 30k miles.

 

Even if the FSM says to change it at 30 K, you should check the gap much more often than that. Every 1 or 2 oil changes check the gap. The correct gap is under your hood on a sticker. It may help it run smoother. Copper spark plugs give a better spark, but go out of spec sooner than platinum/iridium/super pimpy plugs.

 

if you drive your car hard...your plugs wont last 30k...change them depending on how hard your drive...im usually on the gas most the time so i try to change it every 5-6 oil changes...or about 15-20k.