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3. Bad injector or bad cylinder. Unplug each injector to isolate.
4. Do engine compression check. Look for engine mechanical problem.
5. Bad connection at MAP sensor. Unplug and plug in the connector a few times.
6. MAP sensor vacuum line not connected or connected to the wrong area on the intake manifold or throttle
body.
7. See below, Not Running on all Cylinders section
Cuts Out at High Power:
1. Fuel pump not adequate.
2. Injector flow rate too low.
3. Check FUELCUT/MANPRESS parameter. Adjust and try again or set to NO LIMIT.
4. Fuel lines or filter plugged or too small.
5. Check for fuel flow volume out of regulator drain to return of fuel tank.
6. Engine is crossing an improper value.
7. Fuel tank not vented. Remove filler cap check for suction.
8. Bad injector ground connection. Do Ohms check from chassis to pin 8 of white connector.
9. Check fuel pressure, should be 45-50 psi.
10. If system is using a knock sensor then Knock sensor may be activating and reducing the ignition timing too
much. Try higher octane fuel or try lower Knock Sense value.
Not Running on all Cylinders:
1. Check each injector for clicking sound.
2. Not an ignition coil problem if only one cylinder is dead, so likely mechanical, injector, or wiring problem.
3. Bad ignition wire arcing to ground.
4. Bad spark plug.
5. 6cyl, Check 7-pin connector at coilpack assembly to make sure connector is plugged in fully, make sure it is
latched on both sides. 6cyl, check coil pack 4 pin connector to make sure its latched.
Runs but lacks power:
1. Check camshaft timing.
2. TPS vibrating and is activating the ACC PUMP function. Watch AP in Gauge2 mode. Should read zero
when throttle is steady. Set both ACC PUMP values to zero and see if problem goes away.
3. Check TPS hookup and ACC PUMP values for too high a value.
4. Mixture far too rich or lean. Increase or decrease all RPM FUEL values to correct or adjust knob.
5. Fuel tank not vented. Remove filler cap, check for suction.
6. Check timing with a timing light, magnets could be mounted incorrectly.
7. (F only). RPM IGN (ignition timing) values too low.
8. Make sure closed loop is OFF
9. If system is using a knock sensor then Knock sensor may be activating and reducing the ignition timing too
much. Try higher octane fuel or try lower Knock Sense value.
Programmer display is blank:
1. Check power and ground connections on black and red wires of main harness.
2. TPS connections are wrong. Try unplugging the TPS and MAP connectors.
3. Programmer cable is damaged.
4. If ECU is a dual board unit, only the primary provides power to the programmer, so the Primary ecu board
must be powered up for the programmer unit to display data and operate.
SDS EFI in Window:
1. TPS connections are wrong. Try unplugging the TPS cable.
2. Power has been interrupted or EM-5 has reset.
3. Do resistance check of ignition wires. Possible bad crimp at end of wire.
4. Spark plug wires causing EMI (interference). Try different brand of wires. Must use Suppression type plug
wires with SDS.
5. Check for loose spark plug wires.
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