oifish

iTrader: (1)

What causes the black smoke to come out of the exaust during WOT? I've seen this from Porsches, to Camaros, to civics. Just curious.

BLKWS.6

I am trying to tune my 5.0 by fuel pressure modification and am wondering if this smoke is normal too, when i hit it with a friend behind the car, he says there is a SMALL puff of jet black smoke (very minor, dissipates b4 it hits the pavement-5.0 pipes are turn-down style). I am trying to get rid of lean-stumbles in the morning. How much of this black smoke when nailed is acceptable, PS, i have no cats.

spinaltapls1

i have the same problem. i asked some pep i run around with and they all say it is because you have a fast car it is just large amount of fuel burning. very normal after any mods

slowpoke96z28

iTrader: (2)

thats unburned hydrocarbons. its better to be on the rich side than thee lean side.

BLKWS.6

I can tune it where it doesnt puff ANY black, should I do so, or leave it where i get a SMALL puff of black?

Nittany_marine

iTrader: (7)

Listen to this guy....

BLKWS.6

W/o the black puff tune (about 1psi lower fuel pressure) my plugs were VERY MINORLY sooty, and the "arm" was a sooty tan color, I think I will go back 1 psi b/c this had no ugly smoke, and my plugs still looked a LITTLE rich, no?

BLKWS.6

PS. I think with my setup its gonna surge a bit at idle when first cranked before it settles down, i have been told its normal, any thoughts?

Spectator

I thought it was a natural part of the PE (Power Enrichment) that happens at >55% throttle. The mix goes a little rich to be on the safe side.

waiting2bl33d

i know in my eclipse it was tunned to run richer just because like someone said eailer it is a ton better to run richer than leaner... lean = higher temps which = bad motor not good...i'd rather spend more time changing the plugs more often than to replace my motor b/c it ran lean b/c of some crazy event.