| Re: Long Term FT numbers... |
Subject: Re: Long Term FT numbers... by dan0617 on 2010/2/12 14:58:31 Sounds like it does need a hair more fuel in that area, but don't go crazy with it. I am running a '89, so totally different, but a 110 LSA cam. I ended up going to open loop tuning to get it to run right. Mine would think it was lean at very very light throttle, due to fresh air going straight out the exhaust. The blms would keep going up and up very fast, and it would read very lean on the wideband too....until I gave it a little more throttle, then the blms would drop like a rock, and it would be very rich on the wideband. Open loop was my only fix. Sounds like you are fairly close and might get it worked out on closed loop, but if you find a spot at idle or very light throttle cruise that it just refuses to come down in blms no matter how much fuel you add, then gets very rich when you give it a touch more throttle and then the blms tank, you might be having the same issue. If you can narrow it down to just idle or just one fuel trim cell, try letting it idle for a long time or driving in that fuel trim cell for a long time, then shut it off and check the spark plugs. If it is fresh air going out the exhaust screwing up the 02 sensor, the plugs should still read good. Add or subtract fuel then do it again till you get the plugs looking like they should. If it is doing it in more than just one fuel trim cell then this method won't work and you will likely need to run open loop. |
