20 Most Recent
2005 Harley Davidson FLHRCI Road King Classic Questions & Answers
05 road king clas. Turns over no spark help ?
CHECK THIS AS A STARTING POINT:
First check for diagnostic trouble codes (DTCs). THEN check the condition of the battery and do a voltage test and recharge the battery if it is below 12.60V. THEN check the condition and tightness of the battery connections and perform either a conductance test or a load test and replace the battery if and as necessary. THEN remove the spark plug cable from one of the spark plugs and remove the plug and visually check the condition of the plug. THEN attach the HT cable to a SPARK TESTER and clip the tester to the cylinder head bolt and crank the engine over looking for spark and repeat the procedure on the other cylinder also. Be aware that the Engine will not spark with both spark plugs removed, so when checking for spark, use a SPARK TESTER with both plugs installed.
Typically, when IAC is not functioning, the engine will not start unless throttle is opened and the engine will stall when throttle is closed.
Check TP sensor value with digital volt/ohmmeter (DVOM). If TP sensor is equal to or greater than 3.8 volts, system is in "clear flood" mode and engine will not start. While spark is present, fuel is shut off. Problem can be mechanical, such as throttle cables stuck.
No Spark with No Check Engine Lamp at Key ON
Constant power is supplied to the ECM through terminal 31. The ECM turns on when power is applied to terminal 13 of connector [78]. The ECM goes through an initialization sequence every time power is removed and re-applied to terminal. The only visible part of this sequence is the check engine lamp. Upon starting, the check engine lamp will illuminate for 4 seconds and then (if parameters are normal) go out. If battery power is absent at ECM terminal 31: DTCs cannot be cleared. The tool will show them as cleared but they will be present the next time the ignition key is cycled; the ECM cannot be re-flashed; the vehicle will start but the IAC pintle will not reset at key OFF and eventually the pintle will be out of position causing performance problems.
NOTE: The key ON sequence also activates the idle air control motor. If power from terminal 31 is disrupted by a (blown fuse, etc.) always turn the key OFF wait 10 seconds then turn the key ON to reset the motor to the default position.
Test the primary coil resistance on your coil. Disconnect all the wires going to the small terminals (primary) on your coil. Using a good ohmmeter on Rx1 setting, test the resistance between the two small terminals. You should read somewhere between 2 and 3 ohms. If you read more, the coil is bad. Before you do this test short out both leads of the ohmmeter and if the reading is not zero you will need to write down or otherwise remember the number and subtract it from the reading you get from the primary circuit test or you will have an incorrect resistance reading for the primary wires because you will also be reading the ohmmeter internal resistance and/or the wire and lead resistance added to the primary wiring resistance.
You can also test the coil by leaving the "hot" wire on the coil and replacing the other side (ground side) with a short piece of wire. Turn the ignition on and temporarily ground the short piece of wire you put on the "out" (ground) side. When you take the wire away from the ground, (which will collapse the primary current into the secondary) you should see a spark at the plugs if it is a wasted spark system or at one of the plugs if it is not a wasted spark system. If you have current to both sides of the primary of a two part coil both plugs should get a spark whether wasted spark system or not as you are energizing both sides of the primary and collapsing both into both secondaries at the same time when you remove the ground wire from the cylinder head ground.
ALSO check, test your plug wires and wire ends.
Ignition Coil Secondary Circuit Test
With the ignition coil removed from the motorcycle and the ohmmeter set to the RX1K scale place the ohmmeter leads on the secondary coil windings B (middle terminal) to
R (rear secondary terminal/socket), B to F (front secondary terminal/socket) and check for secondary coil winding resistance which normal resistance range will be 5.5-7.5K ohms. If secondary resistance is not within this range check out test results below.
Die's after warming Up
Sounds like the carbs are dirty, The mail inlet where the float works to shut off fuel when the bowls get full has a screen just under the needle valve and there are stopped up with crud, Pull the bottoms off and remove the float & needle valve and the the seat and clean, If you see dirt inside the float bowl then remove the jets and clean them also.
Not finding what you are looking for?