i had my engine rebuilt back 1 year ago and i was having some serious misfire issue. i believe i clear most of the problem now. it should be good as soon i get a retune on it next week. its running rich at idle 13.4 or so. and cruising around 13.7-14.4 i decided to rip on it when i was going up the highway and i notice my trd boost gauge hit 14.5-15psi. here are my mods

bc 272 fi cams
bc valve train
bc 1mm + oversize valves
had world racing intake mani on (was the misfire issue)
now oem manifold
wiseco piston
thick head gasket (cosmic) i think
k1 rods.
removed balance shaft
nst 12 psi pully
mmw header
draxas exhaust
custom cold air intake
rc 750cc injectors
walbro 255 fuel pump

lemme know what you guys think it can be. i had few things in mind the head work, or bad boost gauge. or possible restriction somewhere.

 

Sick build. What about the plugs? Have you checked those yet? What are you using for management?

Sent from my DROID incredible

 

Might want to replace the primary o2 for good measure, looks sick all around though!

 

i just replace my set of plugs too same 1s as the plugs b4 blowing 2 rings denso ik24s and for a/f sensor i replace that too back a year ago b4 tuning or during tuning the misfire i had drove me crazy i couldnt figure out what was going on i had my car tune 2 different places and then started to back track all the new mods 1 step was the intake mani that caused it.. ever since then the misfire pretty much has been gone. now i guess since it was tune on a bad mani everything is off.. so i hope this is it. last thing i forgot to add on was im running snow performance meth kit for as a intercooler last time i dyno it was 287whp now i hope everything is cleared out and hope ill hit over 300+ with rev to 7.5k rpm thanks new tuner now is at nolimitmotorsports..

 

if the miss was manifold related last time check the manifold again make sure a seal hasnt cracked or somthing. just food for thought.

 

deff.. right now the oem one is holding.. atlease on the boost gauge my vac. is reading better around 18hg. ill keep every1 or who is watching this posted with the tuning.. see where i go..