Need a retune?
Thread Starter
TECH Fanatic
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From: Cincinnati, OH
Need a retune? Okay back when I did longtubes and duals I had a local tuner do a street tune on my car. Last year I had it on a dyno and they read the a/f ratio around 12.5- 13 up to around 5k rpm then went a lil rich down to 12.0 above 5k. Well going to work a few weeks ago a coworker was behind me and said when I got on it he could see black smoke coming out of my exhaust and could smell it. Went WOT yesterday while looking out my side mirror and saw a black cloud when I got on it. What could be causing me to run rich? I'm still getting decent gas mileage and its running fine. Could I need to go to the tuner and have it retune it?
Detonation causes clouds of black smoke too fwiw. I would leave trails of black smoke on my mail order tune with an a/f in the low 13's, got dyno tuned and pulled a bunch of timing and no more smoke. 12:1 a/f shouldn't be rich enough to cause plumes of black smoke.
Thread Starter
TECH Fanatic
iTrader: (5)
Joined: Jun 2005
Posts: 1,300
Likes: 1
From: Cincinnati, OH
i dont think i am getting any detonation. my engine isn't knocking. It didn't used to blow smoke out the back. The only thing different between this setup and when it was tuned was i gapped my spark plugs a little closer.
