I need your help, diagnose my plugs please.
they have 6000 miles on them and Except for being out in the Mid-West I use 93 octane.
And they are the stock plugs I got from Len...

Here are the pics.
Thanks for taking a look.

 

:eek:

I assume that they were put at the correct gap when installed.

 

Yes

 

And... This is not the first time my motor has "Chewed Up" plugs like this

 

Of course I cant tell but the gap doesnt seem consistant among plugs. They also look like shiza for 6k.

 

In person... what's left of the arch part is about the same distance.

Here are two more pics, I tried to get a side profile.

 

knock sensor flashing the check engine light?

 

Are these the JDM half-size plugs? Where does the spark plug boot attach?

Seriously, though, you're either running too lean or with too much timing. What is your timing set at? Is your compression raised? Non-stock fuel/timing maps?

 

Plugs are normal , I just stuck them in the box to hold them to take pics.

As for what's done to the motor... Jack from P1Auto tuned it on the dyno and set the vafc and cam gears. All I know is that it's set at 17deg.
OEM JDM 4-1, test pipe, BCIII
AEM CAI
that's it.

 

Second from the left whas most noticable at first (gap/grounded electrode), but in the last pic it's clear that you've definately got some issues (probably running really lean and melting the electrode.

Guess I'll take a look at mine in the next few weeks as well, and re-dyno with my adjusted fuel pressure settings.

 

Yeah, I was just about to ask what your timing was set at....
You are def running to lean.

 

why are the threads so dirty with crap?

is that thread lock or something? or maybe that's the remnants of your electrodes

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Big Phat R &raquo;</TD></TR><TR><TD CLASS="quote">why are the threads so dirty with crap?

is that thread lock or something? </TD></TR></TABLE>
It's anti seize

 

And this is the only chart with what I think is the A/F ...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bbasso &raquo;</TD></TR><TR><TD CLASS="quote">
It's anti seize </TD></TR></TABLE>

duh

&lt;-- dummy

 

have you re-checked the timing to verify that the dist hasnt slipped?

also, what heat range are those? 6? if so, you might want to use 7's...jack would definitely be the man to talk to (duh).

i've never actually seen that happen to plugs. yikes.

i'm going to run out and check my plugs now

 

I really doubt it slipped, I set it at 17 more then 3 years ago and has not moved since

 

How many shot nitrous are you using?

Last time my plugs looked like that, I was on the bottle...

 

look in the back of the haynes manual for the integra and on the back page has a bunch of pics of spark plugs and tells what is wrong with them

cant seem to locate my manual at the moment but will look real quick

 

Rob, I'd bet the farm it's a timing issue. Double check your distributor. Check your cam gears. Make sure your belt didn't slip a tooth. Shine a light down the spark plug holes. What do the tops of your pistons look like?

 

I'll check everything when I get home from work tomorrow... Good thing for beaters

Last time I looked down the hole the top of the piston was dark and somwhat sutt/oil covered.

 

Looks a bit ashy.. I think you are running too lean.

 

Holy **** Rob.

I've seen a few good spark plug diagnosis pages on the net, I'll dig them up.

Upgrade to a higher heat range and tune that ******* ****.

 

This page says you're running leaded gas
http://www.spark-plugs.co.uk/p...s.htm

Preignition?
http://www.densoiridium.com/howtoreadusedplugs.php

Preignition.
http://www.valvoline.com/carca...cid=3

Preignition.
http://www.gnttype.org/techarea/engine/plugs.html

 

So the motor is running lean...
what's the next step? change the vafc settings or change to a different heat range plug?