[vanvan2801]

Hello everybody !

I am from Belgium and I own a ZR-1 Corvette from 1991 for a few weeks. I am not familiar with the history of the car.
I noticed two things:
1) that when I was in FULL mode, above 4000 RPM, nothing more happens. Knowing that the secondary fuel pump activates at around 4000rpm, I decided to check if it was working by removing the fuse from pump 1, so I tried to start the car (cold) but nothing happened. Then I checked to see if the pump wire was plugged into the ecm..it was. So I assumed that pump 2 was out of order. So I ordered 2 new pumps (you might as well change both) after replacement, I repeated the test by removing the fuse and unfortunately, it did not start .... then a road test ... the same thing , it does not exceed 4000 rpm ... I have from time to time the code 41 which appears ....
What do you think? Perhaps the secondary pump relay causing the problem?

2) it is also important that I tell you that part of the vacuum system has been delete (electric vacuum pump, secondary port vacuum tank,...) so I assume that the secondary actuator system is in the open position..so logically a special chip should be installed ..but after checking i still have the original chip (DELCO AXFK 0277). so the full mode cannot work if a special chip is not present ?? - have you ever faced this problem?
Here is some picture of the current chip..
I hope you understand. my english is not very good..
Thank you in advance !