You dont. It is totally electronically controlled, and the setting is programmed in from the factory, and is completely non-accessible to anyone other than the engineers.
wich engine do you have?
ignition problem
Right from the 1991 Explorer , the 4.0 L OHV engine was EDIS ( electronic distributorless ignition system ) using a coil pack instead of a distributor
10 degrees BTDC ( unless engine compartment decal shows different )
Were are the timing marks on a 1991 acura legend
Timing chains, no belt.
on my 1991 5.7 L mercruiser blue water the timing should be 8 degrees before top dead center.
8 degrees
I believe that has the DIS, distributerless ignition system, if so there is no timing adjustment. The timing is controlled by the ignition module, crankshaft sensor and the ECM (engine computer). Try having some run a test using and OSB tester. Sometimes if the sensor is going bad it will show.
If you mean ignition timing it will be 10 degrees BTC.
10 degrees advance
Yes , the 3.0 liter V6 engine in a 1991 Nissan Maxima has a timing BELT ( P.S. - it is also an interference engine )