[rhandwor]

These vehicles have a fuel dist. with a pressure regulator if you look along the manifold it is cast iron about 2 inchs by 4 inchs. They put the regulator on the inside so you have to remove the upper plenium chamber to replace. If you can pull the vacuum hose with a long needle nose check for fuel in it. This is why I suggested clamping the return hose with needle nose channel locks. If bad the car should have more power. Using a pressure gage is best.
The emissions test will give you all codes. Auto zone will scan your engine for codes free. Walmart sells a scanner for $68.00. I would use an ohm meter to check all plug wires. Was your rotor replaced with the cap.
Pinch off the vacuum hose to the brake vacuum booster they sometimes cause problems. If you have a haynes follow instructions to ohm the coil.
Use a volt meter put 12 volt on the positive the negative should be 11 plus volt. Disconnect the neg when doing this.
Also ohm the temp. sensor if it is over 7000 ohms ohm a new one at a parts store. A grounded unit will cause problems.