8 to 10 degrees.
The order is 1,2,3,4,5,6
It should be 6 degrees before tdc, just make sure you disconnect the distributor's computer control wiring harness before you adjust, and check the timing with a timing gun.
No.
worn or loose timing belt?
the widest one on the timeing chane cover right in the middel of it
C3I ELECTRONIC SPARK TIMING (EST) FAILURE is code 42 timing can be off by a lot of factors check vacume leaks plugs wires etc..
go to chuck's Chevy pages .com the answer should be there.
try searching google for the FSM for your vehicle to download. I found mine for free...very helpful
There is no timing belt in that engine. It has a timing chain.
On the fuel line going to the carburetor.
Which sending unit? Oil or temperature? Or ?????
1987 is the last year for a carburetor.