11
IDLE SETTING/THROTTLE PLATE SETTING
Once the engine is up to operating temperature, the idle speed can be set to what was configured in the Wizard. To do this,
open up the Initial Startup gauge screen. With the vehicle in neutral, adjust the idle screw until the IAC Position reads between
2 and 10%. While adjusting the screw if the TPS position reads begins to read higher than 0% cycling the ignition switch will
recalibrate the TPS back to zero.
NOTE: Do not attempt to set the target idle speed and IAC position until the engine is above 160°F!
INITIAL STARTUP AND SETTING THE TIMING
Before starting the engine, have a timing light handy as the first step will be positioning the distributor.
1.
Turn the key ON to power the system and go to Tuning -> System -> Static Timing. This screen allows you to set the
distributor exactly where the Sniper ECU needs it to be positioned to operate the timing.
2.
Start the engine, then move the slider on the screen to 15°, then press SET. Now using the timing light, move the distributor
until you see 15° BTDC on the balancer. Tighten the hold down clamp.
3.
Leave the Static Timing screen by pressing CLOSE. This will take you back to the Home screen and the Sniper will now be
controlling the ignition timing. It is important to note that you will not see accurate timing at idle speed when viewing with a
timing light. This is due to ECU calculations. If you rev the engine off idle, the timing will appear correctly.
4.
From the Spark Screen which is located Tuning -> Basic -> Spark, you can adjust the idle, cruise, WOT and Cranking
timing settings.
FIRST DRIVE
Congratulations on a successful installation of your Sniper EFI system!
Next, you need to simply drive y
our car and let the Sniper’s self-tuning occur. It is best to drive in an area without much traffic
where you can drive under different conditions.
It’s always a good idea to have a passenger present to look at things like coolant temperatures, battery voltage, etc, on the first
drive.
Start the car and let it idle. Let the car get up to operating temperature (coolant temperature over 160 degrees F) so that the
self-tuning can occur
. If you’d like, have a passenger look at the handheld display and look at the “Cl Comp” value. Once this
value is close to zero, the self-tuning process has been completed in that engine operating area. Next, put the car into gear if
it’s an automatic and let it run there. If the vehicle has air conditioning, you can turn it on, which will put the engine in a different
tuning area as well.
Next, slowly accelerate from a stop. If the transmission is a manual, do some slow clutch engagements away from a stop.
Then cruise the vehicle at a steady speed, varying the speeds after a few minutes of steady driving. You can also drive in
different gears. What you are trying to do is run the vehicle at different engine speed and loads.
After driving under various driving conditions, you can perform some harder acceleration runs including WOT runs.
After this, the Sniper EFI will have performed most of the self-tuning needed to occur.
Just performing routine driving will accomplish this process. After the engine is up and running minor tuning refinements can be
performed to optimize fuel economy and power.
Содержание Sniper EFI 550-510
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