8 degrees before top center
electronic spark timing connector
That year did not have a EST/ electronic spark timing connector. The timing is controlled by the PCM / Powertrain Controll Module. It requires a engine scanner to ajust the timing. You can not use a timing light.
That requires an OBD2 engine scanner to set the timing. You can NO longer use a timing light.
your truck does not have a bypass connector
The engine would not run. The engine would lack compression.
Yes, you can install a programmer on a 1989 Chevy truck, but compatibility depends on the specific engine and the type of programmer. Many older vehicles use carburetors rather than electronic fuel injection, which may limit tuning options. However, if the truck has been modified with a compatible electronic engine management system, a programmer can enhance performance by adjusting fuel maps, ignition timing, and other parameters. Always ensure that the programmer is designed for your truck's specific setup.
Doesn't have a timing belt.
If this is the 4.3 engine, it is located on the bracket next to the ignition coil.
Chevy did not use timing belts on truck engines. T-chain only
Turn engine over and observe is distributor is rotating
my check engine light is on on start up truck runs great after wormed up runs rough
it has a timing chain NEUTZ