That requires an engine scanner to set the timing.
The timing is set and adjusted by the Engine Control Module according to driving situations.
The V8 engine has ( 8 engine cylinders )
4.6 L - V8 engine ( .054 inch ) 5.4 L - V8 engine - L and Z engine codes ( .054 inch ) 5.4 L - V8 engine - M engine code ( natural gas .044 inch ) The engine code is the 8th " character " of your VIN according to motorcraft . com
A 454 Chevrolet engine which is experiencing a choke light while the choke is physically open, indicates the choke is not receiving power. This can be caused by a loose connection or a defective choke.
Try "Jegs"
The first 4.7 l engine was introduced in 1999
Depending what make it is; Deville has a 4.9 (V8). Deville Concours 4.6 (V8)Northstar engine. Eldorado has the 4.6 (V8) Northstar engine. Fleetwood 5.7 (V8) Seville 4.6 (V8) Northstar engine.
COLD ENGINE STARTING OR STARTING AFTER REFUELING --Set unit on a flat surface. --Slowly press the primer bulb 6 times. --Move choke lever to FULL CHOKE position. --Squeeze the throttle trigger fully and hold through all remaining steps. --Pull starter rope handle sharply 6 times. --Move choke lever to HALF CHOKE position. --Pull starter rope handle no more than 6 pulls, until engine runs. --Allow engine to run 10 seconds, then move choke lever to OFF CHOKE position. RESTARTING A WARM ENGINE --Move choke lever to OFF CHOKE position. --Pull starter rope handle until engine runs. --If engine does not start in 5 pulls, follow instructions in STARTING A COLD ENGINE.
It is a carburetor where the engine coolant is routed through the choke system of the carburetor. When the coolant is cold the choke will close. As the engine coolant heats up it opens the choke.
Could be that the air/fuel mixture is set too lean. Needs adjustment.
switch on push primer bulb or choke the engine set throttle pull rope or turn key