GEN2TEG

Just trying to get some opinions on WTF could be the problem. I have a 427whp built turbo DA. Plugs are 7 series NGK's and gapped to .32 Had an MSD SCI box and external coil installed. I ran it at the track today and it still is misfiring. Not sure what else to look at? Car runs fine at low boost and 15psi. Once I run C16 and turn it up to 22psi it misses mainly at top end.

Thanks.

markaria

go with an 8 series plug, and gap to .26 to .28 and see if this helps...also make sure your plug wires are not too old. good luck

GEN2TEG

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by markaria &raquo;</TD></TR><TR><TD CLASS="quote">go with an 8 series plug, and gap to .26 to .28 and see if this helps...also make sure your plug wires are not too old. good luck</TD></TR></TABLE>

Iwill try that, thanks for the advice. I am running stock Honda wires which are brand new.

TURBO4drTypeR

If you try that and it still dont help then MAYBE it could be the ignitor going out

GEN2TEG

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TURBO4drTypeR &raquo;</TD></TR><TR><TD CLASS="quote">If you try that and it still dont help then MAYBE it could be the ignitor going out </TD></TR></TABLE>

Good point as well.

Anymore?

maxspeedhonda

definatley try to close that gap up a little as stated above...

GEN2TEG

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by maxspeedhonda &raquo;</TD></TR><TR><TD CLASS="quote">definatley try to close that gap up a little as stated above...</TD></TR></TABLE>
The only thing with that is that we have already tried that and it didn't help any

GEN2TEG

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TURBO4drTypeR &raquo;</TD></TR><TR><TD CLASS="quote">If you try that and it still dont help then MAYBE it could be the ignitor going out </TD></TR></TABLE>

This could be the issue too. Is there a real way to tell if the ignitor is going? I have heard that the only way to tell is when it dies?

DRAGLS

So what is the gap at so far? I run anywhere between .020 to .025" gap on the integra on the supra i run it at .028" gap

GEN2TEG

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DRAGLS &raquo;</TD></TR><TR><TD CLASS="quote">So what is the gap at so far? I run anywhere between .020 to .025" gap on the integra on the supra i run it at .028" gap</TD></TR></TABLE>

Currently im running .32

Drew Peacock

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GEN2TEG &raquo;</TD></TR><TR><TD CLASS="quote">

Currently im running .32</TD></TR></TABLE> To wide a gap, I was missing firing up top on 15psi this is with the full msd kit as well including wires etc. I don't really think the MSD ignition does that much personally, try .028 it fixed my misfire.

D-Man

maybe the tune doesnt have enough timing in it

GEN2TEG

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D-Man &raquo;</TD></TR><TR><TD CLASS="quote">maybe the tune doesnt have enough timing in it</TD></TR></TABLE>

This is also something to look at. Although I think my timing is set to 16 degrees. Not sure if this is the standard for high horsepower honda's?

maxspeedhonda

.32 is kinda large. When I ran the street civic at 12psi, I had the same gap and it missed like a bitch. Pull the plugs and close the gap a little, then try to run it again. Repeat until the misfire is gone.

Look the ignitor up the a chilton, haynes, helems, etc. You should be able to pull voltage/resistance readings from the ignitor to test wheather or not the part is good. I will tell you right now, a new oem ignitor from honda is not cheap.

ladysman

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GEN2TEG &raquo;</TD></TR><TR><TD CLASS="quote">Just trying to get some opinions on WTF could be the problem. I have a 427whp built turbo DA. Plugs are 7 series NGK's and gapped to .32 Had an MSD SCI box and external coil installed. I ran it at the track today and it still is misfiring. Not sure what else to look at? Car runs fine at low boost and 15psi. Once I run C16 and turn it up to 22psi it misses mainly at top end.

Thanks.
</TD></TR></TABLE>

For this setup and 22 psi, the plugs are too hot. Go with 8 series and close the gap to ~.28. Still misfires, close the gap until it doesn't blow it out. My guess is the plugs weren't cold enough. GOod luck.

GEN2TEG

Thanks again guys. I will try this tomorrow hopefully it will work. I still have a bit of race fuel left in the tank for some test runs.

SpoolnG2

**** all that MSD ****...Put a brand new Distributor King dizzy on there. Throw out the MSD **** and give it a shot. I was using all that MSD stuff and it was fine at like 12-13psi but once i started going up to 15 to 17psi and even sometimes at 12 after i ran it a few times it would misfire up top. I totally got rid of the MSD and put a brand new distributor on and i havent had any problems yet. A guy at Payn technologies made 430whp on a mustang dyno with 26psi with a stock honda dizzy. Keep the plugs gapped at like .028 and go a little bit colder then just a 7 series. I use an NGK R5671A-8 Stock no. 4554

GEN2TEG

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SpoolnG2 &raquo;</TD></TR><TR><TD CLASS="quote">**** all that MSD ****...Put a brand new Distributor King dizzy on there. Throw out the MSD **** and give it a shot. I was using all that MSD stuff and it was fine at like 12-13psi but once i started going up to 15 to 17psi and even sometimes at 12 after i ran it a few times it would misfire up top. I totally got rid of the MSD and put a brand new distributor on and i havent had any problems yet. A guy at Payn technologies made 430whp on a mustang dyno with 26psi with a stock honda dizzy. Keep the plugs gapped at like .028 and go a little bit colder then just a 7 series. I use an NGK R5671A-8 Stock no. 4554</TD></TR></TABLE>

If all else fails, you can bet I will get a new dizzy.

Thanks again.

ekb18c

try .028, .032 is too big of a gap.

and use ngk part # 5820

Mase

use a 8 or 9 heat range plug.

i use .024- .025 on anything higher than 400.

maxspeedhonda

there you go, straight from the horse's mouth

Code Blue

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by maxspeedhonda &raquo;</TD></TR><TR><TD CLASS="quote">there you go, straight from the horse's mouth</TD></TR></TABLE>


my words exactly

shermanyang

iTrader: (1)

i remember when i was misfiring like crazy on only 15psi it was due to me running NGK V-Power plugs. the electrode sat higher/further out from the threads causing this 'blowing out the spark' thing. i switched to regular NGK plugs...3330's to be exact and that solved the problem immediately. this could or could not be your problem...just trying to help.

XSIintegra

Not to argue; I have a Crane HI-6S running a Crane Blaster 2 coil. I'm NA right now but will be going boosted within three months. I'm running the stock gap on a modded motor and was told to gap my new plugs...upwards of .44. The spark on this set up is FKN huge. The new Magnacore 8.5mm wires leak from the power. I would think that .23~ is a little small...ok maybe for a stock ignition but on a modified ign?...that seems rather small. I guess its cool if it fixes a problem...but damn that seems really close.

DSF

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by XSIintegra &raquo;</TD></TR><TR><TD CLASS="quote">I would think that .23~ is a little small...ok maybe for a stock ignition but on a modified ign?...that seems rather small. I guess its cool if it fixes a problem...but damn that seems really close. </TD></TR></TABLE>

You have to remember, in a f/i application, there is a lot more air turbulence and fuel that can prevent spark even at stock gaps and definitely at larger ones.