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XDI200 Manual Version 0.1
- Page 83 -
©2017 Electromotive, Inc.
Make sure there is adequate fuel pressure at all times.
Make sure the crank trigger is installed properly.
Make sure the wiring is correct.
Make sure the DFUs are GROUNDED and that the coil screws are TIGHT.
Make sure that the engine sensors are reading correctly.
Make sure that the fuel injectors are firing, and are not clogged.
Check the fuses and relays if a power loss occurs.
12.1.1
Air, Fuel, and Spark
As a result, troubleshooting an engine problem can be divided into these three parameters. With
laptop software that allows the tuning of the engine as well as the diagnosis of potential engine
sensor problems, troubleshooting an electronically controlled engine is fairly simple.
12.2 Starting Problems
12.2.1
Air-Related Starting Problems
A small amount of air must enter the engine cranking in order for the engine to start.
o
Open the throttle a small amount during cranking. If the engine starts, manipulate
the IAC motor settings as outlined in the
Tuning Guide
Section sub section idle
air control.
for proper start-up parameters.
o
If the engine does not start with a small amount of throttle opening, look to either
fuel or spark-related problems.
12.2.2
Fuel-Related Starting Problems
Note:
When diagnosing a fuel system problem, a fuel pressure gauge will be needed.
With the ignition key switched on, the fuel pump should run for a few seconds. The fuel
pressure should then increase to the rating of the fuel pressure regulator (typically 43psi).
o
If the pressure does not rise to this pressure, there is either air in the line, or the fuel
pump or regulator is malfunctioning.
Air can be relieved from the fuel line by running the fuel pump for a minute or
two.
o
If the pressure stays at 43psi but the engine will not start, look to the fuel injectors.
If the fuel system passes the above test procedure, look to the engine tuning calibration
file.
o
Too much of a starting enrichment will flood the engine. A flooded engine will have
spark plugs that are wet with fuel.
o
Too little starting enrichment will keep an engine from starting and running properly.
o
A coolant temperature enrichment that is too low or too high will cause an engine to
have cold starting problems.
12.2.3
Spark-Related Starting Problems
The crank sensor is the first thing to check when an engine will not start.
o
Crank the engine. The LED on the
XDI200
ECU should flash red-green-red-green
in a fairly steady fashion. If the light is not functioning in this manner during
cranking, and there is no RPM reading when viewed on a laptop, there is likely a
trigger problem.
o
IF the Crank indicator is solid green then…
