all Chevy tbi's are to be set at 0 degrees
Adjust your timing
0 degrees
check/replace spark plugs
starting on driver side front of engine,it is 18436572
Yes it is 350 TBI is injection
How do you set the timing for an 1989 Chevrolet G20 van - 350 cu. in. with tbi?
1-6-5-4-3-2-.
Yes it is fuel injection. It is called a TBI / Throttle body injection.
check the vacume line behind the tbi that runs to the map sensor
It is not adjustable, sealed from the factory. DO NOT FULL WITH ITThere is no conventional idle adjustment for the TBI motors, but if your willing you can advance or retard the timing by rotating the distributor housing a couple of degrease, but not to much. This will raise or lower your RPM a bit.
The 91 did not have a carburetor. It was fuel injected / TBI Throttle Body Injection and it has 2 injectors that feed all 8 cylinders.