I have a 93 olds Achieva sc and i have looked everwhere for a engine wiring harness. and i looked on The internet the engine is a 3.3 v6.

You may need a shop manual to get the test procedures.
You would need to know if you are getting power to the pink black wire going to the module, and a signal from the crank sensor.
The computer controls timing.

From the fuel system troubleshooting guide - 1993 Oldsmobile Achieva

Inspect Fuel Pump Low Fuel Pressure.
Inspect Fuel Pump Relay - Faulty Fuel Pump Relay.
Inspect Fuel Injector Pressure Regulator - Faulty Fuel Injector Pressure Regulator.
Inspect Fuel Pump Strainer - Clogged or Dirty Fuel Pump Strainer.
Inspect Engine Control Computer - Incorrect Operating Information Being Delivered and Sent From The EEC.
Inspect Fuel Tank - Fuel Tank Empty.
Inspect Fuel Line - Fuel Line leaky/kinked/loose/disconnected
Inspect Fuel Fittings/banjo bolt(s) - leaky/loose fitting(s)

For your next posting, in 1993, Oldsmobile produced the Achieva with four engine types:
Available engines

• 4 Cylinders, VIN "3" 2.3L MFI SOHC Quad
• 4 Cylinders, VIN "A" 2.3L DOHC Quad 4 HO
• 4 Cylinders, VIN "D" 2.3L MFI DOHC Quad 4
• 6 Cylinders, VIN "N" 3.3L FI OHV

To find the engine type of your 93 Achieva, compare the 8th digit of your VIN code to the entries in the above table.

under the windshield washer resivoir /drivers side front of engine compatrment

you may have to get the new engine harners wires and pcm form the 94 model, that will sove your problem

fuel lines inside the intake plhenum may be cracked and leaking inside the plhenum. same thing happened to my 1992.sonoma. they are made of a plastic material and tend to crack right in the bend of these lines.

Check the fuel injector ground circuit from the ECM

you will need to change engine and transmission along with the engine wiring harness and computer also if your 2.3 was carburetorated you will need the fuel pump out of the fuel tank .
also remove the engine frame mounts and the transmission cross-member from the 93 might also need changed.

First of all, I own the same vehicle. 93 camry xle v6. I have rebuilt the engine, etc. Open the hood. Looking at the engine, it's on the right side under the air intake tube from the air cleaner box, on the top of the intake manifold. There are two sensors threaded (screwed) in side by side and have a connector harness plugged in each of them. The thermal time switch is the sensor located on the inside, toward the engine. Note: Take a close look at the connecters inside grooves. You can tell the difference shape. Good luck.

Visit the autozone.com website and register the car. It doesn't cost anything and you will have access to an online repair manual for the car. The steps for replacing the rear brakes should be available there. It's a pretty handy resource for making repairs to your car. Hope this helped and best wishes.

Hello;
Have you looked at a Haynes or Chitons vehicle specific book? They usually have the wiring diagrams in the electrical section. If not the library often has the high end books with the diagrams you can trace or photocopy.
Hope this helps.
Thanks;
Rich
RPM Northwest