sleeprstang01

im new to this site still tryin to figure it out... so i doint know if im in the right place just yet...i have a 2001 mustang gt has a mmr 900 long block with a diablo chip and tune from SO CAL TUNING... now my problem is its stutering a little bit sounds like a misfire and its blowing light smoke out the exhaust its kinda whit and gray.. and it smells of fuel a lot when runing..any suggestions as to what it could be?

sailorflavor

Running waaaay to rich...what size injectors and fuel pump? If you still have the stockers then the tuners might have over compensated the fuel to give you more "power" but what they don't tell you is that after a while of running like that you will have a good bit of stutter and maybe some damage...if you would like I'll take that block off your hands. lol I'm looking to buy the mmr900 soon but I had to buy a house first...how do you like it?

Repzard

have your tune checked, sounds like a rich condition.