INSTRUCTIONS FOR CHRYSLER PERFORMANCE PARTS PACKAGES # P3690426-7-8 & P3690789 WITH CONTROL UNIT P4120505 Revision F - November 1981
INTRODUCTION
The Chrysler high output magnetic impulse ignition system is a completely new concept in ignition systems and offers many advantages over breaker type ignition systems. Some of these advantages are:
1. Operates at speeds up Co 10,000 RPM.
2. Increases secondary voltage and current.
3. Eliminates irregular timing (spark scatter).
4. Eliminates distributor contacts and condenser.
5. Maintains maximum dwell for highest spark energy.
6. No high speed misfiring when properly installed.
7. Low cost.
8. Keeps plugs cleaner for more consistent E.T. 's.
9. High reliability.
Chrysler Performance Parts now has available a package which includes all parts necessary to convert the old point-type ignition system to the new electronic magnetic-pulse ignition system for mild competition use.
The package includes a vacuum advance distributor, wiring harness, electronic control unit, ballast resistor, and installation instructions. The kits are:
Six Cylinder Pkg. P3690789 B Engine P3690427 A Engine P3690426 RB Engine P3690428
If you should have any further questions or problems refer Co Bulletin # 25 or write to the following address: CHRYSLER CORPORATION, Attention: L. S. Shepard, P.O. Box 1718, Cims: 423-13-06, Detroit, MI 48288
INSTALLATION INSTRUCTIONS
1. Remove and discard original distributor (note position of rotor).
2. Remove and discard original ballast resistor.
3. Remove original wires leading to distributor and coil.
4. Maintain original coil (PN 2495531 or 2444241).
5. New spark plugs should be installed and gapped at .035 in.
6. Be sure plug wires are in good condition. Replace if in doubt. (Silicon jacket wire is recommended).
7. Install electronic control unit. Mount this unit away from excessive heat. Some suggested locations are: The inner fender shield the radiator baffle, the grille vicinity, or the outer firewall area. When mounting the electronic control unit, remember Chat the exposed power transistor case is electrically hot. The unit should be mounted in an area which minimizes the possibility of shorting the transistor when working in the engine area. Shorting the power transistor to the heat sink or any ground while power is on may damage the control unit. Also, when mounting the electronic control unit, be sure the unit box is grounded. Clean all paint from the area Co which it is Co be mounted. If there is any doubt as Co a good ground, a wire may be run from the control unit case Co any good ground.
8. Install the ballast resistor in any convenient area. Since this unit generates heat, do not mount near rubber hoses, fuel lines, wiring harness, or on engine.
9. On initial scare up, ballast resistor may smoke. Do not worry, this is a normal and Temporary occurance. Proceed with wiring as illustrated in figure # 1. For various applications, it may be necessary Co stripe tape wrapping from supplied harness and cut individual wires Co appropriate lengths for your application. If any extra wires are required for your application be sure to use #14 stranded copper wire (or larger).
10. Securely crimp and/or solder terminals of any new leads Chat are required. When soldering is necessary, be sure Co use resin core solder only.
11. Tape all exposed bare wire joints using black electrical Cape.
12. Where possible, lee new wires follow original wiring harness. New wire may be Cape wrapped Co original harness if desired. Remember Co consider all linkage movement and motor movement when running new wires and locate accordingly. Do not run new wires near exhaust manifold.
13. Be sure terminal marked Ign. 1 (figure # 1) receives battery voltage when ignition switch is in "ON" position and terminal marked Ipn. 2 (figure # 1) receives battery voltage when ignition switch is in crank position. Check voltages at these points with ballast resistor disconnected.
Installation Instructions continued-
14. Install large connector in electronic control unit and secure with supplied screw. (8 x 18 x 1-3/4 PN 9424111).
15. Set gap in distributor between reluctor and pick-up at .008". Use a non-magnetic feeler (such as brass shim stock) to set this gap. (Std. steel-shim feeler gauges may be used with extra care.)
16. Tighten pick-up hold down screw. Recheck pick-up to reluctor
17. clearance. Install distributor with rotor in same position as in original distributor.
18. Secure distributor cap and connect distributor leads to control unit leads.
19. Start engine and set engine timing as usual.
20. Trouble shooting:
a. Engine turns over but will not start: (1) Check for battery voltage at "IGM" wire terminal with switch in "START" position. (2) Check wiring for loose or poorly connected wires. (3) Check for good ground on electronic control unit.
b. Engine idles rough and stalls: (1) Battery in poor state of charge (must test 12.5V minimum with engine running - with alternator). (Specific gravity should be minimum of 1.250). (2) Carbon tracked distributor cap. (3) Bad coil.
c. High speed miss: (1) Loose connection or poor ground. (2) Spark plugs in poor condition. (3) Faulty plug wires. (4) Low battery voltage.
21. If an electronic tachometer is used, hook tachometer lead (which originally connected Co distributor lead) to negative coil. If tachometer does not function properly, consult the tachometer manufacturer for proper installation procedure.
22. If you wish to use a speed - limiter, hook the "normally open" side of the limiter Co the point marked (I.L.) in Figure #1. Be sure to solder and re-insulate this connection well. Ground the terminal on the limiter marked "common"
. B. SPECIAL CONSIDERATIONS
1. For high performance applications, special voltage regulators P3690731 or P3690732 should be used. P3690731 is for 1970 and later cars; P3690732 is for 1969 and earlier models. The charging systems requiring the P3690732 may be identified by the fact that the alternator has only two (2) wire connections, whereas, the charging system, using P3690731 have three (3) alternator wire connections.
SPECIAL NOTE;
All cars using the 1969 or earlier two wire charging system must use regulator P3690732 when using the Chrysler Magnetic Impulse Ignition.
Both of these regulators are all solid state devices and they hold a constant regulation of approximately 14V which does not fall off with temperature as does the production regulators.
2. For mild competition use, the hook-up shown in figure #1 is adequate. If you desire a hotter spark or if your car is used for mild camp. and limited high speed operation, we recommend the following changes:
a. Replace production coil with Accel coil P4120889 ("Super" coil).
b. Replace the ballast resistor (P2095501) with Accel resistor #150001 (this resistor is supplied with the super coil).
