victoriasamantha

ls/vtec with t3/t4, msd ignition with blaster 2 coil, using wideband o2 sensor, the fuel is a little rich, if i push the gas about a quarter of the way it will build boost and pull, once i press on gas any further it will break up and pop, the plugs are gapped around .042, should they be set lower cause of the boost?

Pilot

For boosted engines, spark plugs gaps are typically 0.022-.028. Gap it down and re-try.

Ross.

crxnj

Its probably the msd igntion..Most of the times it is..

markaria

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pilot &raquo;</TD></TR><TR><TD CLASS="quote">
For boosted engines, spark plugs gaps are typically 0.022-.028. Gap it down and re-try.

Ross.</TD></TR></TABLE>

yup what he said^

tallyturbo

i had the same problem. it ended up that i was running to rich at idle and it eventually fouled out my plugs. so everytime i went into boost id wood break up.

Blaze45

I have herd of a lot of people having issues with the MSD ignition setup, but that mostly stems from not installing it correctly. So make sure that you installed it correctly and re-gap your spark plugs to about .028. I was running into spark blowout at 7psi with my setup. What kind of AFRs are you running throught your RPM range? That could also be an influence on your breaking up.

good luck

Blaze

victoriasamantha

around 12.5 all the way thru, should i lean in out in the non boost map

tallyturbo

i would lean it out just a little when not in boost.

victoriasamantha

i set to .028 and is works great, thanks everybody