random lean spike
random lean spike Had my car tuned a little ago, but for the life of me (and others), I can't figure out why the car has a random lean spike. I say random because it does NOT happen on every run. This happened before and after tuning.
It happens between 5000-5400 rpms. The air/fuel ratio spikes up to 15 or 16 or so and then levels off again slightly lean. After tuning, the air/fuel was pretty much flat on 13.
Anyone have any idea what could cause this lean spike? Like I said before, it does not happen on every run.
I will post the dyno graph as soon as I can.
It happens between 5000-5400 rpms. The air/fuel ratio spikes up to 15 or 16 or so and then levels off again slightly lean. After tuning, the air/fuel was pretty much flat on 13.
Anyone have any idea what could cause this lean spike? Like I said before, it does not happen on every run.
I will post the dyno graph as soon as I can.
I didn't think to check the injectors. Although I only put down 380, I would think the stock injectors would be fine. I will do what I can to get the logs.
As far as the MAF, there were nothing wrong with the MAF readings. All were perfect.
As far as the MAF, there were nothing wrong with the MAF readings. All were perfect.
