S&S Cycle 49-State Certified X-Wedge Engines - Manual (Page 16)

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8- Troubleshooting Tips
The following is a list of common issues found during a new installation. Included with the ECU is also a CD and instructions for running the Pro Tune 2
software. This will allow access from a computer connected to the ECU to read engine trouble codes and sensor outputs for troubleshooting problems.
See the instructions included with the Pro Tune 2 CD for installing the software on a PC.
A- Engine will not start:
I- Weak or no-spark condition may be caused by fouled plugs, a discharged battery, improper wiring to the coil, or damaged coil. Verify
condition of components and wiring.
II- Lack of fuel may be caused by lack of fuel in the tank, improper wiring to pump, fuel hoses disconnected, or improper fuel pressure.
Verify adequate fuel in tank and fuel pressure at fuel rail is 58 psi.
lll- Bank angle sensor not installed or wired incorrectly. Verify installation of bank angle sensor and wiring.
B- Engine will not run at steady speed or RPM:
I- Restriction in fuel supply. Verify fuel pressure at fuel rail.
II- Injector or oxygen sensor wires swapped front to rear. Check for proper orientation of wires to the fuel injectors and oxygen sensors.
III- Lack of Vehicle Speed Signal (VSS) or improperly calibrated VSS. The ECU uses the VSS to determine when the engine should be in idle
control. If this signal is not connected to the ECU, the idle control system will not work properly and may cause engine speed to vary.
Likewise, if the Wheel Speed Gear Factor is not correct, the ECU may not enter idle control at the appropriate time. Additionally, if the
end of the VSS in the transmission is contaminated (i.e. with metal filings), it may produce a signal when the vehicle is stopped and
inhibit idle control.
CONCLUSION
Complete remainder of installation according to the applicable service manuals. Refer to the S&S® 49-State Certified X-Wedge™ Engine Owner’s
Manual for important information on breaking in the engine.