Fast 30400-KIT-EZ-EF Instructions Manual - page 63

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0, the TPS should be re-calibrated.  This can be done by selecting TPS Calibration from the 

Advanced menu. 

 It is normal for fuel pressure to rise and fall with varying engine load.  Fuel pressure will be

lower at idle and in normal driving when there is more vacuum in the intake manifold.  Fuel

pressure will rise as the engine approaches wide open throttle.  This is true of both return and

returnless style fuel systems.

 With a return style fuel system, the fuel pump will run for several seconds after key-on to

prime the fuel system.  With a returnless fuel system, the ECU will only run the pump as

much as it needs to in order to reach and maintain the target fuel pressure.  The pump may

run for different lengths of time at any given key-on.  It may not run at all in some cases.  All

of this is normal with a returnless fuel system.

 There is some adjustability built into the linkage between the throttle shafts. It should be set

up as close to a one-to-one arrangement as reasonably possible – as opposed to a progressive

setup. Having all four blades open at the same time gives the best fuel distribution.

EZ-Test Indicator Lights 

The EZ-EFI

®

 ECU features a series of LEDs that can be used to monitor its operation and to signal if 

the on-board diagnostics has detected a problem.   

LABEL 

COLOR 

DESCRIPTION 

DURING 

NORMAL 

RUNNING

CRANK/DIAG 

Blue 

Indicates that the ECU is receiving a crank signal and is reading RPM.  If 

the on‐board diagnostics has detected a problem, this LED will flash 

rapidly.  If that happens, refer to the Codes screen in the Diagnostics 

section of the hand‐held to determine what code has been set. 

Solid 

POWER 

Green 

Indicates that the ECU is powered on.  This LED should remain on 

whenever the vehicle is keyed‐on.  After the vehicle is keyed‐off, this LED 

will remain lit for several seconds and then fade out.  This is normal and 

indicates that the ECU is going through its proper shut down procedure.  

If this LED goes out immediately at key‐off, there is a problem.  The most 

likely cause is that power to the “BATTERY POS” wire is being lost at the 

same time as the 12V switched source.  If the ECU does not shut down 

properly, new learning, new user adjustments and other internal 

information will not be retained by the ECU. 

Solid 

SW IGN 

Green 

Indicates that the ECU is receiving a 12V switched input.  This LED should 

remain on whenever the vehicle is keyed‐on ‐ including during cranking.  

Losing the 12V switched input during cranking can lead to a host of 

starting and running issues.  If this is happening, a different 12V switched 

source must be found.  This LED should go out immediately at key‐off.   

Solid 

INJ A 

Orange 

Indicates when each injector output is active.  These will start to appear 

more solid as RPM increases. 

Flashing 

INJ B 

INJ C 

INJ D 

POINTS 

Red 

Indicates that the ECU's ignition output is active.  This LED will still be on 

even if the EZ‐EFI® is not set up to control timing. 

Solid