One of the most common modifications that require recalibration of the ECM are changing injectors and changing Mass Air Flow (MAF) sensors.
For the rest of this article, we’re going to assume that...
Prerequisites
Before you read this, make sure you have read Theory: Alpha-N, Theory: Mass Air Flow and the FordOverview. Although not essential, it wouldn’t hurt to have at least read about Spee...
If you’re completely new to burning chips, you may want to take a look at the Beginners’ Guide before reading the rest of this article. You will probably still need to read this guide in order to...
This is going to be rather brief because Alpha-N is rarely used as the primary strategy for engine management today. You should at least know what it is because it is often used as a “sanity chec...
Understanding your fuel injectors is one of the most important things you can do to ensure that fueling is appropriate for your engine. First, some vocabulary:
ECM, ECU, Engine computer : used ...
This article is being written to answer the most basic questions about what to shoot for when tuning an engine. This is not intended to be absolutely what you must do – it’s intended to be a sta...
Be prepared to do a lot of reading in the numerous side links on this page. More information that is beyond the scope of this overview will be available.
“Mass Air Flow” (MAF, for short) is a met...
What makes engine management tricky is that even the best theoretical models fail to accurately represent physical behavior in certain situations. All engine controllers would use the same logic ...
If you do not have a strong background in physics and chemistry, be prepared to do a lot of reading in the numerous side links on this page. This isn’t intended to be a brutal presentation of the...
Before you read this, you should already have read the articles on Injector Theory and Speed-Density. This article will not make much sense without the background information in those articles.
F...
As stated in our overview of MAF systems, one of their main weaknesses are air leaks. Whenever air can enter the engine without going through the MAF, weird things happen.
There are two principa...
