67 twin turbo dart
Got around to retesting the coils signals, and with the wire and plug on a screw driver got low spark, when put next to the inner fender well big sparks. So traced ground wire for coils, took off battery negative and put to the firewall using the wiper motor(been deleted) mount bolt as the new ground, changed engine block ground to firewall. Started the engine felt and sounded smooth, but did the disconnect on the coil connectors with my wife holding 1200rpm, still some made no sound change in rpm when plugging back in. Could it be the crank sensor not reading well and firing some coils and not all? I do have a new holley crank sensor I'm going to install once the motor is out for the oil leak fix. But all coils fire when commanded and all had great spark to the metal fenders. Even put coil dwell up to 4.0ms, some searching shows factory sets them at 4.5ms. Here is how I wired the coils up, just connected to one of the other sensor ecu grounds.
Got around to retesting the coils signals, and with the wire and plug on a screw driver got low spark, when put next to the inner fender well big sparks. So traced ground wire for coils, took off battery negative and put to the firewall using the wiper motor(been deleted) mount bolt as the new ground, changed engine block ground to firewall. Started the engine felt and sounded smooth, but did the disconnect on the coil connectors with my wife holding 1200rpm, still some made no sound change in rpm when plugging back in. Could it be the crank sensor not reading well and firing some coils and not all? I do have a new holley crank sensor I'm going to install once the motor is out for the oil leak fix. But all coils fire when commanded and all had great spark to the metal fenders. Even put coil dwell up to 4.0ms, some searching shows factory sets them at 4.5ms. Here is how I wired the coils up, just connected to one of the other sensor ecu grounds.