heya guys

i got problem with the engine misfiring at high rev, currently its boosting about 15psi, im still running stock ignition apart from the MSD leads

my tuner suggested that i go with MSD fancy ***** but i have seen over and over again in this site that many people making 500+whp on stock ignition

im running autronic PNP board, dizzy is about 85k mile old

please help

 

stick with stock. Did you tuner try re gapping the plugs? Whats your setup? Did he see if your plugs are too cold? Fouling out? Too hot? too much gap? what kinda gas are you running?

 

the car had heat range 7 before but he decided to use heat range 8 platinum just to be safe, i am unsure whether he actually re-gap the plugs or not
im running pump gas at the moment

is it worth it to change the dizzy cap, rotor and ignitor ???

 

put bigger grounds on chage the plugs and check for any shorts anywhere

 

any other suggestions ?

 

how much boost are you running when this happens?

Depending on how much boost and weither im using 116 or 93 or not. I gap my plugs between .030 and .020 on OEM ignition.

also check you grounds like already stated

Do you know how to read your plugs and what to look for?

 

this is happens on 15psi of boost
i dont tune this car myself, i have tuner that doing it for me

and hes pretty good

im running 93oct

will check the grounds also

 

im having the same problem with my turbo charged prelude, running 11 psi.
I've been trying to figure this out for a long time.
Any tips will help

 

Mine sputters sometimes around 6.5-8k right now, but it is on a basemap. I was told it was probably getting too much fuel up top. Either way i'm pretty sure my issue will be fixed with a proper tune.

 

dude, ushouldnt boost on a abase

 

I'm gonna say detonation. To much boost for 93 octane. Needs race gas. A buddy here in utah just put up 740hp on a dynojet on totally STOCK ignition!!! NKG 9's gapped to 19. Hotter plug (NGK 9's), 112 octane, 3 bar if you don't already have one. Good Tune, then turn the boost up.

 

ignition pick up problem of some sort most likely.

check into a T1 cam trigger set up if it will work with your ems, im not familiar with autronic at all other than hearing of people having missfire issues with it.

its not detonation from too much boost on pump gas, i ran 25psi on pump gas on my car for over a year. and its not the stock igntion unless there is a fualty part.

my money's on ignition pick up/signal problem of some sort.

 

my money is on the cap/rotor/plug gap.....

get a new cap+rotor + gap your plugs @ .20

 

how much normall for rotor + cap ??

 

say i change the rotor + cap with new ones and gap the plugs to .20

if it still misfires what else should i look into ???

 

coil, ignitor, plugwires, all grounds..... there are alot of things it "could" be.....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dturbocivic &raquo;</TD></TR><TR><TD CLASS="quote">coil, ignitor, plugwires, all grounds..... there are alot of things it "could" be.....</TD></TR></TABLE>

 

make sure your running 93 octane and definitly recheck the gap on your plugs, with trhat kind of set up they should be closed a lot comepared to the gap they come with from the shop, should be around .20

 

bump

 

start easy, gap em down a little and go from there. i am running 0.018 on iridium 8's

 

cap, rotor, plugs

 

i had a look at the cap and rotor today, they looked pretty sad

ordered new cap, rotor and coil from honda today and they will be here tomorrow

wish me luck

 

having same problem. I'd had them gapped to 30 at first = misfire, then .25= misfire, and now 20 = slight misfire.. My question is whats consequences are there from running a small gap?

 

been told that u get less hp

 

how much less?
i'm 540-+
with a .018 gap.
unless you are running a magneto, you will have to gap the plugs down. thats just it. the more boost and cylinder pressure, the higher chance to blow out the spark. when you are making power like that there is a trade off.