I don't really know how forums work but I'm having a problem and need some help. I just recently did an engine swap on my 2001 Monte Carlo SS 3.8 I just put another engine in and when I went to turn it over the security came on. When I disconnected the battery, not joking a week ago it did the same thing. I did that 35 min PCM reset and it worked but its not working this time I have tried multiple bypasses and procedures. If anyone could help that would be great

 

Hi Panik & Welcome to the MCF.
I sure don't have the tech knowledge to help you, but keep checking back & hopefully one of our expert tech member's will see your post & Help..

Good Luck

 

Check the below MCF Thread to see `if it might help
https://montecarloforum.com/forum/fw...ecurity-17611/

 

First, when you did the engine swap, I assume this is for the same model engine? If so, I assume the PCM, BCM and ignition lock cylinder are all the same? If not that can become part of the issue (different VINs in the different parts).

 

Yeah they are all the same

 

>maybe?<> a failed passlock sensor which is part of the ignition lock cylinder. A secondary cause could be the ignition switch itself. Worn contacts inside the ignition switch can cause voltage drop issues which can affect the passlock system. Proper diagnoses should be performed before replacing any parts. Does your security light flash >>?

 

Yeah I just put a new ignition in and nothing but it does flash