ebach007

I have a 95 b20b4 w/vtec swap Integra. When my vtec kicks in, a dark cloud of smoke comes out of my exhaust. It only happenes the moment the vtec kicks in, then it goes away. I don't know if my car has been tuned.

What am I burning? and will a tune fix this??

5literbeater

sounds like an excessive amount of fuel is being delivered to the engine

s2katin

What color smoke is it? Just dark grey/blackish, or what? Could be a couple different things...explain more.

boredom

fuel dump, what cams are you running?

ebach007

I guess its more of a dark grey smoke.

old school Skunk2 intake mani
aem fuel rail
330cc fuel injectors
stock FPR
not sure on the cams, most likely stock GSR
aem cam gears

fuel pressure gauge reads 48psi

Fabrik8

Sounds like you're temporarily running rich when VTEC engages. You probably just need a tune.

ebach007

Thats what Im thinkin too. I'll try a street tune here soon. I would do a dyno tune, but cant find anyone to do it for less than $400 so far. Im thinkin a street tune will be alot cheaper.