How much time does it take to replace a fuel pump on a 1989 chevy corvette. How do you do it

Question edited for clarity.
Question moved to Corvette sub category.

Removing one of the fuses disconnected the anti theft module.

https://www.google.com/search?q=1989+Chevy+Corvette+reset+security

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Question edited for clarity and moved to the special category for Chevy Corvette. I can recommend the Corvette Forum website.
https://www.corvetteforums.com/forum/corvette-c4-forum-14/fuel-pump-relay-7540/

There are two according to this

https://www.justanswer.com/chevy/9zql2-1992-chevy-corvette-fuel-pump-relay-located.html

More information, images and videos

https://www.google.com/search?q=1994+Chevy+Corvette+Convertible.+Fuel+pump+relay+location

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Fuel injectors cleaning ! How to Diagnose Test and Clean Dirty Clogged or Bad Fuel Injectors

Check your fuel pressure it should be 40-47 with the key and engine off and 30-44 with engine running.If its not within these specs then replace the fuel pump and filter.

The only part that would come to mind after all of this would be the fuel pump relay. This is located on the fire wall on the drivers side of the car. When that goes bad it does not allow for adequate fuel to cycle through.The other thing would be timing. You need fuel air and spark for the vehicle to fire. After all the test and after replacing the fuel pump relay. I would do a compression and a leak down test. Are you sure that the timing did not jump a gear? You can also look and test the IAC (Idle Air Control) or the MAF (Mass Air Flow Sensor). Also do a test to check fuel pressure. The last Corvette that I worked on personally that had this issue it turned out to be the Fuel Pump Relay. Good luck let me know if you have any further questions.

is the pump inside of the fuel tank ... or outside.. if inside the tank usually has to be taken out if the pump is an external electric pump it is somewhere along the fuel line if it is mwchanicle it is on the engine block

My first guess would be the fuel pump. Alot of defective pumps will operate until they warm up.

fuel pump is in fuel tank remove tand and take pump out of top of tank were hoses and fuelguage sensor hooks up

weak pump possible,wiring would ber all the time,relay could be relay its the cheapest part so id start there

REMOVAL

1. Relieve fuel system pressure.
2. Disconnect battery ground cable.
3. Remove fuel filler door.
4. Remove fuel cap.
5. Remove fuel tank filler neck housing and disconnect drain hose.
6. Remove screws attaching fuel meter/fuel pump to tank.
7. Disconnect fuel lines, fuel vapor line and electrical connector.
8. Remove fuel meter/fuel pump and gasket.
9. Replace fuel pump.

INSTALLATION

1. Reverse procedure to install.