hi i was just wandering if someone could explain to me why my engine bogs down as soon as the secondary starts to open for few seconds then picks up fine?

i have tried size 135 and 150 jets in the secondary but dosnt change much so i left in the 150 for better highend power.

Thanks!

This is generally not a jetting problem, but usually caused by fitting the wrong size carburetor.

Are you using Hitachi DCG306? Which one?

could be flooding while your at a constant speed so when u put your foot down it bogs downuntil it clears out.. my a14 had the same problem..

yes more info needed, by the sounds of it id say the vtec is broken:]

hahaha vtec.

yes its a stock hitachi carburetor i was just testing to see if it was the secodarys by sticky taping a 5 cent coin onto the mecanical weight to make it open up slower and it made the bogging alot less but not 100%.

thanks

Have you checked your fuel pressure? Maybe pushing fuel past the needle somehow?

yer its a new fuel pump was somthing around 2.5 or 3 psi

what colour are the plugs?
1 more vtecyo ha

Put the bigger jet in the primary. I had the same problem. I have 190 in primary 's and 160 in the secondary's. My car bogged off the start and then picked up. Solved it by putting the bigger jets in the primarys. I run two carbs.