|
|||||||
|
|
|
|||||
|
|
|||||||
EFI Tricks
A blocked tube to the MAP sensor can cause all sorts of hard to trace drivability problems. Blow out this tube before going through other more laborious checking procedures.
The speed sensor on EFI systems has virtually nothing to do with running performance. But it can have quite an effect on idle behavior. That's the purpose of the device, to let the computer know which idle state is needed, rolling or static.
When installing or performing major work on EFI engines, tape up the wiring loom socket to stop the entry of problem causing grease and dirt.
In an ideal world, to evaluate engine tweaks, we would use a chassis dyno. Not all of us have access to one so try this. Hook a laptop with a Texas Instruments DSP (Digital Signal Processing) chip to the critical sensors on the engine. This allows you to record the sensor output during a test run, which consists of a marked piece of straight road. A pass is made in each direction, saving results on the laptop. Then at home, the data is crunched, and plotted. From time and RPM, you can compute acceleration, then torque and horsepower. The results are then multiplied by a 'fudge factor', in order to calibrate the magnitude of the graph to match published figures. Now, when tweaking hardware, you can compare the results to the original.
To understand EFI I found this site called The Corral at where there's a ton of information on EFI and ignition related links.
