O-Tay.. scratch the fuel pump ..
Works in P and N but not D at idle….
Possibly something screwy with the N safety….?
Will come back to that.
Lets start here…
Need to see if your losing spark when you turn on the lights.
And if so, where.
Troubleshooting
Troubleshooting an electronic ignition system is fairly simple. Once it has been determined that there is no spark, there are a few quick checks that can be performed to determine the cause. A DC volt/ohm meter can be used to check the continuity of the pick-up coil. It can be checked at the leads as they leave the distributor, or on pins 4 and 5 of the ECU connector. When measuring the resistance across the two leads of the pick-up coil you should see a 150-900 ohm reading. Always flex the wiring leading to the distributor and to the ECU while checking the resistance to be sure that there are no breaks in the wiring. You should also check for 12 volts at pin 1 of the ECU connector when the ignition is in the “on” position. It is also important that the ECU be securely bolted in place and that bolts provide a good ground to the ECU housing. The only other lead that is connected to the ECU is the “-” lead to the coil, which can be checked to insure that it is not broken.
The other important component of the electronic ignition system is the ballast resistor. It should be checked with an ohm meter and should have 1.2 ohms of resistance. Typically, a failure of the ballast resistor will result in the engine starting, but then dying as soon as the key is released from the start position. It is often handy to have a spare ballast resistor or ECU lying around to use for troubleshooting.
Upgrading or replacing an existing system
When replacing a points type system, you will need the wiring harness that goes with the electronic control unit. The installation is fairly simple and the only electrical connection that needs to be made is to the ignition “+” circuit.
If you are replacing an Electronic Lean Burn or Electronic Spark Control system, there are several other things to be considered. While these systems are of themselves, electronic ignition, they do not use the same components as the regular electronic ignition system. The spark advance was being generated by the computer, therefore the distributors lack vacuum and mechanical advance. Many of these distributors also have two pick-up coils and are not usable with a regular electronic ignition system. Additionally, the carburetors that were equipped on these cars may lack a vacuum advance port for a conventional distributor and often need to be re-calibrated for use without the computer.