Louis M

Alright, someone who was behind me told me that he sees black smoke coming from my exhaust at a little over 3 or 4K rpms. Now, I know this usually means a bad secondary turbo, but I am running with a downpipe, meaning one less cat. Would it be possible that this smoke is just the non-clean gasses coming out?

mor

I have full exhaust (dp, mp, cb) and no black smoke.

Louis M

mother-faukner!

mor

Sorry bro. If you wanna rebuild your turbos yourself, its' quite easy. Turbocity sells rebuild kits, $300 for the parts for the pair.

There are only a few parts...really easy. I don't know if it's better than havnig a pro rebuild it but mine work fine.

cruiser

Hmm... black smoke is usually unburnt gas. Blue smoke is oil and white smoke is usually coolant.

Maybe you're just tuned too rich ?

BoostCrzy

black smoke is fuel...not your turbo!...

Louis M

awesome! i realized that, but i didn't want to post again to go to the top... alright, thanks! btw, i'm not running an engine management program on my car, and i'm only running dp... why would the computer be off?

cruiser

I had that black smoke when my MAP sensor got disconnected.

twinturboy

Black smoke is usually excess fuel. You could have a weak ignition system and you may not be igniting all you fuel causing the black smoke. I usually see a lot of black smoke with my pettit ecu with intake, cb, mp, dp. I believe my maps are pretty rich, and I dont have an ic yet. With a stock ecu, I assume with everything working properly, you wouldnt get much smoke. Something must be wrong with your ignition system or something.

Louis M

so change spark plugs?

cruiser

Or get MSD or some similar ignition amplifier. (I at least think it is)

David Hu$tlerhoff

or fuel pressure regulator