I have a aem wideband, iam running 10 lbs of boost with stock injectors, stock afm i got 2.5 hardpipes, k&n, walboro fuel pump.. when i hit full boost the afr is a solid 10, when i release the throttle it drops all the way down to 16- then quickly jumps back to 14.8-15.2. My worry is why it runs so rich. 10 is as rich as it reads so iam sure its richer. I know rich is better than leaning out so is this cool?
from rich to lean
- Thread starter ndial2498
- Start date
When you let out of the throttle quickly, the fuel injectors are cut (do not inject fuel), which is why you're going from rich, to super lean (usually off the charts lean), then when you bring it to an idle, the injectors are firing again.
Any zero-throttle, in-gear coasting will be full lean. It's normal.
And you need to tune. 10afr's are pretty rich, especially if you think you're even more so. Too rich, you run the risk of cylinder wash, which is when fuel seeps past your piston rings, and will inevitably thin out your oil, thus killing it's lubrication abilities, and if let go long enough could even contribute to rod-knock.
Any zero-throttle, in-gear coasting will be full lean. It's normal.
And you need to tune. 10afr's are pretty rich, especially if you think you're even more so. Too rich, you run the risk of cylinder wash, which is when fuel seeps past your piston rings, and will inevitably thin out your oil, thus killing it's lubrication abilities, and if let go long enough could even contribute to rod-knock.
ndial2498;1295237 said:
Yes you actually need a " Tuning Device "
I had just a Safc for basics. It's nothing great, but it is better than nothing at all.
I would look into tuning devices or a stand alone, or piggyback system.