What should the timing be at on a 1984 buick 231 3.8 engine, recently rebuilt

I assume you are talking about a BUICK 231 V6 , In that case there are several some on the sides of the engine and some on the ends of the engine, may even be some in the cylinder heads.

might have issues with pressure plate, / or "if cable" adjustment of clutch cable, and if fluid type have the master cylinder checked might need replacement of the rubber kits hope this helps

3.8L (229 CID)The 229 cid (3,751 cc) engine was first introduced for the 1980 model year and was produced until 1984. This engine replaced the 250 cid in full-size Chevrolets and Camaros as the new base V6. Additionally, the intermediate Chevrolet Malibu and Monte Carlo also used the 229 cid as a replacement for both the 200 cid V6, and the 231 cid Buick V6. Both the Buick V6 and the 229 cid Chevrolet V6 are 90-degree V6 engines, and both are often referred to as the 3.8L V6. These engines should not be confused as being the same, and are completely unique engine designs.
The 229 cid has a 3.736-inch bore and a 3.48-inch stroke, identical to the Chevrolet 305 cid V8 engine. The 229 cid used the same 2.45-inch main bearing and 2.10-inch rod bearing diameters as the 200 cid V6 engine. Also like the 200 cid V6, the 229 cid used the same crankshaft with the 18-degree offset throws and the same 5.7-inch connecting rods with 0.050-inch narrowed ends. It came equipped with 1.84-inch intake valves and 1.50-inch exhaust valves. The 229 cid V6 was only equipped with a 2-barrel carburetor. For 1980 the 229 cid used a mechanical Dualjet. From 1981 to 1984 the electronic Dualjet was used along with the GM's CCC (Computer Command Control) system. The 229 cid was rated between 110 and 115 hp (86 kW).

Buick Engines except HEI: Buick Engines for most except HEI:
Rotation: Clockwise
Firing Order: 1-8-4-3-6-5-7-2

Sounds like you have covered almost everything!!! It could be the control module or the fuel pump relay.

you need to find someone with an old type scan tool,or one that has an adapter for the older cars to read the codes. you can also do this by jumping 2 wires on tha obd connector and count the flashes. the first suggestion is the best. get the code and get back to me and we'll go from there. hope this helps Thanks Ray

The electronics for the timing is all electronic coming from the engines computer. If you had rebuilt the entire engine you just assemble it correctly and the computer does the rest

BACK IN 1985 BUICK REGAL HAD 3.8 V6 231 CU INCH ENGINE.BUT BUICK ALSO USED THE V8 307 OLDS ENGINE.V6 263 DIESEL AND V8 350 DIESEL ENGINE.BACK IN 1985.

i have a 355 motor and i run autolite copper plugs and they work great, and most plugs are pregapped but just as a refrence 0.35 thousandths is the gap for that

This is a "TUG" with a 1984 Ford engine,231, four cylinders that uses propane. From other source, I was informed that the center mark of the three found on the backing , timing cover, should be lined up with the mark on the camshaft. The crankshaft sprocket to be lined up with the notch, just above the sprocket. The auxiliary sprocket that also controls the distributor shaft rotation, rotor should be pointing at the #1 position with reference to the distributor cap. This was the information I used and the engine got started. Note: This particular engine has 129 teeth on the timing belt.