1994 Pontiac Firebird Car doesnt have right power/shakes al

Alright. Here is a list of problems for loss of power. 1. Incorrect ignition timing 2. Faulty distributor cap, wires, etc 3. Faulty or incorrect gapped spark plugs 4. Air filter dirty (go ahead and get a K&N filter no matter what) 5. Spark timing control system not operating properly 6. Faulty ignition coils 7. Brakes binding 8. Automatic transmission fluid level incorrect 9. Clutch slipping 10. Fuel filter clogged 11. EGR system not working correctly 12. Use of bad fuel 13. Low or uneven cylender compression 14. Air (vacume) leak at intake manifold or plenum

I have redone the plugs, wires, o2 sensors, ignition coils, air filter, and I just had gotten it code scanned and the readings were haywire. Is there anything I have to do to the computer before installing? I have a new one and put it in but no difference. Someone told me sonething about flashing or something. I have no clue what that means. Also my car only has 38 fuel pressure and it should have 49-55 could the fuel pump be bad? I replaced the fuel filter also. Thanks.

Fuel pump, or fuel relay. Could be electrical, or computer. Mine is a 95 trans am and is constantly having elctric problems. Just make sure air is fine: filter, intake, vacumes. Then spark (make sure your new plugs came gapped right) then fuel. If the car has power when you first start it then it just may be that relay or something else electrical. Not sure how much a lack of gas would make an engine shake. Donate $5 for a better answer. And make sure you are getting good fuel

This new computer. Is it after market? Did you disconnect the battery while installing? My brother in law put one on a camaro, not sure if he had to take it in for calibrating, but I put a camaro 4.3 litter pc in an s-10 to delete the cutt off withno calibrating