crash89
15+ Year Contributor
- 3,543
- 194
- Mar 5, 2008
-
Punta Gorda,
Florida
Little back story. About a month ago I installed some new RCI2200s. Dialed in great that night and car ran like a beast. A few days later the car started running pretty rich.. Did a boost leak test and found a vacuum plug cracked and was leaking on the intake manifold, fixed. Car ran like new again. Last friday night on my way home from work the wideband just went full lean (- - -) no matter what load. The car does have a small pre-sensor exhaust leak but that has only ever effected a reading at idle.
About two months ago I was only getting a wideband reading of 14.8 no matter what load, I figured the sensor took a crap so I replaced it.. Turns out the plug on the back of the gauge came out so the original sensor wasnt bad.
So back to today Im trying to address the lean issue. Pulled the plugs they did seem a bit hot, gapped 21 thou. Logged the car the other day and noticed that my front o2 was only reading .02v at cold start. I've never noticed that, thought maybe that the o2 sensor was going bad (replaced it two years ago). Also the CombinedFT were 16%. Isnt this supposed to be 0+/-3? Well, anyways I ended up replacing the fuel filter since I've been on E85 for a couple years, that makes sense, if its clogged id be running lean. Just got back and the gauge is still reading lean, did a small 2nd gear to see if it would knock, pulled nicely and no knock. Is my gauge just taking a shit?
Here are a couple logs from this morning. The first one is the first cold start after changing the filter and a small cruise. The car has this thing where itll die a couple times before itll stay idling, this log shows that. I have no idea what the reason behind that is. Second log is the small second gear pull.
About two months ago I was only getting a wideband reading of 14.8 no matter what load, I figured the sensor took a crap so I replaced it.. Turns out the plug on the back of the gauge came out so the original sensor wasnt bad.
So back to today Im trying to address the lean issue. Pulled the plugs they did seem a bit hot, gapped 21 thou. Logged the car the other day and noticed that my front o2 was only reading .02v at cold start. I've never noticed that, thought maybe that the o2 sensor was going bad (replaced it two years ago). Also the CombinedFT were 16%. Isnt this supposed to be 0+/-3? Well, anyways I ended up replacing the fuel filter since I've been on E85 for a couple years, that makes sense, if its clogged id be running lean. Just got back and the gauge is still reading lean, did a small 2nd gear to see if it would knock, pulled nicely and no knock. Is my gauge just taking a shit?
Here are a couple logs from this morning. The first one is the first cold start after changing the filter and a small cruise. The car has this thing where itll die a couple times before itll stay idling, this log shows that. I have no idea what the reason behind that is. Second log is the small second gear pull.
