What is the timing pattern for 89 Chevy Celebrity?
On a 1989 Chevy Celebrity the timing is controlled by the engine control module, there is no specification or provision for adjusting the timing manually.
If your 89 Celebrity has the 2.5L 4 cylinder engine the ignition module is mounted on the block below the intake manifold toward the drivers side of the engine. If your 89 Celebrity has the 2.8L V6 the ignition module is mounted on the block on the radiator side of the engine on the drivers side. Both are a bit of a pain to get to, but it is doable.
Why would an 89 Chevy S10 Blazer 4x4 feel like it wants to turn off when at idle after changing all the fluids plugs and wires?
Pull everything off the front of the engine. Remove the timing chain cover. unbolt the timing gear on the cam shaft (the bigger one) then pull the timing gear off the crankshaft. (the smaller one). and replace with new chain and put the gears back on making sure the timing lines are still lined up. and bolt everything back on