has spark and fuel, wont start.
Ok, you're forgiven
Don't ever make the mistake of thinking that "new" or unused means "good"
If one wire is not used it's a so called "4 prong" box, and should have a two prong resistor. Normally, an original 5 prong box will have a 4 prong resistor. The confusion is, that an older system with a 4 prong resistor can ALSO use the newer 4 prong box, but NOT the other way around. An older 5 prong box MUST have a 4 prong resistor
I'd be replacing the pickup coil, and regapping the thing. You MAY have a badly worn distributor.
Generic diagram of (older) 5 pin ECU, with 4 pin resistor. The bottom connection of the resistor, jumpered across is the ign feed from your ignition switch
the newer "4 pin" ECU, and by the way, you cannot tell by looking at the ECU. It may have 4 or 5 pins, and still be a 4 pin ECU
Ok, you're forgiven
Don't ever make the mistake of thinking that "new" or unused means "good"
If one wire is not used it's a so called "4 prong" box, and should have a two prong resistor. Normally, an original 5 prong box will have a 4 prong resistor. The confusion is, that an older system with a 4 prong resistor can ALSO use the newer 4 prong box, but NOT the other way around. An older 5 prong box MUST have a 4 prong resistor
I'd be replacing the pickup coil, and regapping the thing. You MAY have a badly worn distributor.
Generic diagram of (older) 5 pin ECU, with 4 pin resistor. The bottom connection of the resistor, jumpered across is the ign feed from your ignition switch
the newer "4 pin" ECU, and by the way, you cannot tell by looking at the ECU. It may have 4 or 5 pins, and still be a 4 pin ECU
