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Classic Car Parts
ALDON IGNITORS TESTING
ALDON IGNITORS TESTING
TESTING IF SLOW OR HARD TO START FOLLOWING THE IGNITION INSTALLATION, THE VEHICLE MAY HAVE AN INADEQUATE EARTH OR A LOW PRIMARY VOLTAGE. FOLLOW THE INSTRUCTIONS BELOW TO REMEDY THE PROBLEM.
a) BEFORE STARTING HOLD THE IGNITION SWITCH IN THE ON POSITION FOR A FEW SECONDS PRIOR TO ENGAGING THE STARTER MOTOR.
b) CONNECT THE IGNITOR RED WIRE TO A CONFIRMED 12-VOLT POWER SOURCE THAT IS CONTROLLED BY THE IGNITION SWITCH.
c) CHECK ALL CONNECTIONS AND ENGINE EARTHS FOR CORROSION OR RESISTANCE.
d) CHECK THE BATTERY’S STATE OF CHARGE. IF THE VEHICLE WILL NOT START AFTER INSTALLATION OR THE VEHICLE QUITS AFTER STARTING, THE FOLLOWING TEST MAY BE DONE TO CHECK THE SYSTEM.
a) CONNECT THE POSITIVE (+) LEAD OF A VOLTMETER TO THE NEGATIVE (-) SIDE OF THE IGNITION COIL. CONNECT THE NEGATIVE (-) LEAD OF THE VOLTMETER TO EARTH. SET THE VOLTMETER TO DC VOLTS ON AT LEAST A 15 VOLT SCALE.
b) DISCONNECT THE HIGH VOLTAGE WIRE FROM THE CENTRE OF THE DISTRIBUTOR CAP AND EARTH IT TO THE ENGINE BLOCK OR CHASSIS.
c) CRANK ENGINE.
d) THE VOLTMETER SHOULD FLUCUATE FROM A RANGE OF 1 OR 2 VOLTS TO A RANGE OF 10 TO 12 VOLTS AS THE ENGINE IS CRANKED.
e) IF THE VOLTMETER DOES NOT FLUCUATE, ONE OF THE FOLLOWING PROBLEMS EXIST. i) IF THE VOLTMETER SHOWS A CONSTANT 0 READING, THERE IS AN OPEN CIRCUIT SOMEWHERE IN THE PRIMARY IGNITION CIRCUIT.
ii) IF THE VOLTMETER SHOWS A CONSTANT VOLTAGE IN THE 1.0 TO 3.5 VOLTS RANGE, THE POWER TRANSISTOR IS SHORTED OUT.
iii) IF THE VOLTMETER SHOWS A CONSTANT VOLTAGE EQUAL TO THE BATTERY VOLTAGE, THERE IS AN OPEN CIRCUIT IN THE IGNITOR OR THE HALL CELL IS NOT OPERATING.
IGNITION COIL THE IGNITOR WILL WORK WITH MOST STANDARD 12V, BALLAST OR SPORTS COILS. THE ‘IGNITOR’ IS ONLY COMPATIBLE WITH A ‘POINTS STYLE’ COIL. EIGHT CYLINDER ENGINES REQUIRE A COIL OF 1.5 ohms OF RESISTANCE. FOUR AND SIX CYLINDER ENGINES REQUIRE A COIL OF 3.0ohms RESISTANCE. FOR NON BALLASTED SYSTEMS OR A COIL OF 1.5ohms FOR BALLASTED SYSTEMS. N.B. RACE/ HIGH SPEED/ HIGH RPM APPLICATIONS NEED A COIL OF 1.5ohms. MEASURED BETWEEN THE POSITIVE (SW, + OR 15) TERMINAL AND THE NEGATIVE (SW, - OR 1) TERMINAL. DO NOT USE AN ELECTRONIC IGNITION COIL, THIS TYPE OF COIL WILL PROVIDE TOO MUCH CURRENT TO THE IGNITOR, CAUSING IT TO BURN OUT. EARTH LEAD IF THE DISTRIBUTOR IS FITTED WITH AN INTERNAL EARTH LEAD IT IS IMPORTANT THAT THIS IS LEFT IN PLACE OR REFITTED WHEN THE IGNITOR IS INSTALLED. REV COUNTER FLICKER IT HAS COME TO OUR ATTENTION THAT CERTAIN REV COUNTERS PARTICULARLY ON EARLY M.G.’S AND LOTUS’S CAN SUFFER FROM REV COUNTER NEEDLE FLICKER WHEN FITTING OUR IGNITOR. WE HAVE ASCERTAINED THAT REV. COUNTERS WITH THE PREFIX ‘RVI’ ON THE DIAL ARE NOT COMPATIBLE WITH ANY ELECTRONIC IGNITION, NOT JUST THE ALDON IGNITOR. THOSE WITH THE PREFIX ‘RVC’ ARE COMPATIBLE WITH ELECTRONIC IGNITION AND SO THERE SHOULD BE NO PROBLEM. THE EARLY ‘RVI’ TYPE CAN BE CONVERTED TO BE COMPATIBLE AT A COST OF APPROXIMATELY £55.00 + POST & PACKING + V.A.T.
COMMON QUESTIONS AND ANSWERS
Q. What is the first thing I should check if the engine will not start?
A. Make certain all wires are connected securely to the proper terminals.
Q. The engine still will not start or runs rough. Are there any tests I can do?
A. Yes, remove the red ignitor wire from the coil. Connect a jumper wire from the positive side of the battery to the red ignitor wire just removed from the coil. If the engine starts you have a low voltage problem. (This is a very common problem). Remember this is just a test. Not intended for permanent installation.
Q. How can I fix a low voltage problem?
A. First if you have an external ballast resistor, connect the red ignitor wire to the ignition wire prior to the ballast resistor. Second, if you do not have a ballast resistor you must connect the red ignitor wire to a 12-volt source that is controlled from the ignition switch.
Q. What type of coil do I need?
A. Any “points style” coil with minimum 1.5 ohms of resistance in the primary circuit for 8 cylinder engines and minimum 3.0 ohms resistance (primary) for 4 & 6 cylinder engines.
Q. How do I check my coil for resistance?
A. First you need an ohmmeter. Remove all the wires from the coil. Attach the meter to both the positive and negative terminals. The reading must be 1.5 ohms or greater for 8 cylinder engines and 3.0 ohms or greater for 4 & 6 cylinder engines.
Q. What do I do if my coil does not have enough resistance?
A. You could purchase and install a ballast resistor. Or you could purchase a Flame Thrower 40,000-volt coil, which provides resistance internally and is compatible with the ignitor. Note: Many vehicles came equipped with a resistor wire or a ballast resistor. These applications may not need and additional resistor.
Q. What happens if I leave the ignition switch on when the engine is not running?
A. This can cause your coil to overheat, which sometimes will cause permanent damage to the coil and the ignitor.
Q. May I modify the length of the ignitor wires?
A. Yes, you can cut the wires to any length your application requires. You can also add lengths of wire if needed (20-gauge wire). Please make sure all wire splices are clean and connections are secure.
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