quickieafsetup
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quickieafsetup [2010/02/01 09:01] twdorris |
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| ====== Quickie A/F Setup ====== | ====== Quickie A/F Setup ====== | ||
| I was asked to store this post away somewhere for future reference. For now, I'll just dump it in here as is and maybe come back later and edit/expand upon it. It's really just documentation of my personal process for running through a "quickie" setup with a new car using DSMLink. It's intended to help the user get a handle on whether fuel delivery and airflow metering all make sense. | I was asked to store this post away somewhere for future reference. For now, I'll just dump it in here as is and maybe come back later and edit/expand upon it. It's really just documentation of my personal process for running through a "quickie" setup with a new car using DSMLink. It's intended to help the user get a handle on whether fuel delivery and airflow metering all make sense. | ||
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| First, if you don't already know what fuel trims are or how they're used by the ECU, then I would strongly recommend you start by reading through [[FuelTrimUpdatePoints|Fuel-trims: What They Are and How They Work]]. Knowledge of this fundamental concept is __**key**__ to understanding everything else below. | First, if you don't already know what fuel trims are or how they're used by the ECU, then I would strongly recommend you start by reading through [[FuelTrimUpdatePoints|Fuel-trims: What They Are and How They Work]]. Knowledge of this fundamental concept is __**key**__ to understanding everything else below. | ||
| - | I generally monitor ''CombinedFT'' and ''AirflowPerRev'' at idle. I want to see ''CombinedFT'' cycling around +/- 8% or so. You'd expect to see 0.24-0.28 g/rev for ''AirflowPerRev'' at idle ((Automatics and 2.3L engines will generally have a slightly higher AirflowPerRev value at idle.)), but I don't get too caught up on that if the fuel trims are inline with global fuel settings that make sense for my injectors. | + | I generally monitor ''CombinedFT'' and ''AirflowPerRev'' at idle. I want to see ''CombinedFT'' cycling around +/- 8% or so. You'd expect to see 0.24-0.28 g/rev for ''AirflowPerRev'' at idle ((Automatics and 2.3L engines will generally have a slightly higher AirflowPerRev value at idle.)), but I don't get too caught up on that if the fuel trim is inline and you have global fuel settings that make sense for my injectors. |
| If fuel trims at idle are not where I want them, I either use the lower airflow sliders (log ''MAFRaw'' to see where to make adjustments) or I use deadtime to tweak things. If I'm running SD, I'll use the SD VE table instead of the airflow sliders. | If fuel trims at idle are not where I want them, I either use the lower airflow sliders (log ''MAFRaw'' to see where to make adjustments) or I use deadtime to tweak things. If I'm running SD, I'll use the SD VE table instead of the airflow sliders. | ||
quickieafsetup.txt ยท Last modified: 2024/03/15 11:16 (external edit)
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