43
6. Move sensor wires away from ignition.
7. Don’t ground solenoids or other devices at the same place as the EM-5 ground.
8. Move EM-5 further away from engine.
9. Solenoid switching may cause this. Disable any solenoids, relays, motors etc. Diodes can be connected
across solenoids to absorb electrical spikes. Call us for help.
10. Using non-resistor spark plugs. You must use resistor plugs with SDS.
Strange characters or black bar across the top of the LCD window:
1. Programmer cable damaged, common problem. New cable can be found at most computer stores.
2. Measure the resistance of all spark plug wires. Possible poor crimp at the end of a wire causing arcing, or
bad insulation causing arcing to ground. Replace or repair any wire that has a much higher resistance than
the others.
3. Interference from spark plug wires. Try different brand of plug wires. Must use Suppression type plug
wires with SDS.
4. Programmer data being interfered with. Don’t run cable with other wiring.
5. Loose programmer cable connection.
6. Change spark plugs to resistor type. Non-resistor types cause electrical noise.
7. Programmer was plugged into EM-5 AFTER the EM-5 was powered up.
8. Move ground connection to EM-5 to a different location.
9. Check main harness connection to EM-5.
Engine fills up with fuel:
1. Bad EM-5 ground wire connection.
2. Check for leaking fuel pressure regulator diaphragm.
Won’t run over 2000 rpm:
1. Check FUELCUT BELOW TP limit. Aircraft applications set to NO CUT.
Will not rev up or has Miss:
1. Check ACCPUMP values. May be too high.
2. Check AP number in gauge2 mode. Should be zero when throttle is stable. Check this with engine running.
May only show up at certain RPM’s.
3. Check for leaking fuel pressure regulator diaphragm. If fuel in vacuum reference hose, replace the regulator.
4. Check for bad values in RPM or MAP parameters. Could be crossing a bad value anywhere.
5. Hall sensor mount is vibrating. Stronger bracket required. Watch RPM reading in Gauge1 for ERR
message.
6. Check FUELCUT/MANPRESS and FUELCUT/RPM parameters.
7. Check resistance of all spark plug wires. Possible poor crimp at the end of a wire causing arcing.
8. Try a different brand of spark plug wires. Must use Suppression type plug wires with SDS.
9. If Knock sensor is being used, Knock Sense value may be too high. If there is no knock sensor on the SDS
system set Knock Sense to 1, and Knock Retard to zero.
Unstable RPM reading in Gauge 1 mode.
1. On “D” systems using a tach wire to the coil, some types may cause double triggering in the tach circuit of
the ecu. You may have to install a Hall sensor to give the ECU a clean tach signal.
2. On “F” systems, check Hall sensor alignments and magnets. Bracket must not vibrate or flex.
Idle speed too high:
1. Throttle stop may be set to hold open throttle plate. Make adjustment.
2. Vacuum leak.
Idle speed too slow:
1. Adjust throttle stop screw.
To Next Page
Loading...