2018 LT1 Engine Swap Wont Start
06-23-2021, 09:30 PM
#1
2018 LT1 Engine Swap Wont Start I have a 2018 LT1 and TR6060 that I put into my 1967 Camaro. I am very familiar with LS motors and have done dozens of engine swaps with cams, however, this is my first swap with a new LT1 Gen V motor. The motor has a Texas Speed cam and I deleted the variable valve timing. The computer was flashed with all the correct specs for this motor.
The car has been sitting for months now with the same problem. Every time I turn the key it starts up right away and then immediately dies. It won't stay running for longer than 2 seconds UNLESS I spray starting fluid into the intake. So it seems that once the car starts, there is something that causes the fuel or the injectors to stop working.
Here is what I have checked so far:
1. Wire Loom was successfully tested on another motor and started another car using it. So the wire loom is not the problem
2. The computer was plugged into a different 2018 LT1 motor and that car started up just fine with no issues. So the computer is not the problem.
3. The fuel pressure has been checked with a gauge on the line and we have it regulated to 60psi which is what's recommended. If I crack open the fuel line right before it goes into the block it will leak fuel which shows it is getting fuel.
4. Pulled the plugs and we are getting a good spark with all new spark plugs.
At this point, I am assuming it has to be a sensor, which is unfortunate considering there are dozens of them. My thoughts are it could be a fuel pressure sensor or cam position sensor but I really am not sure. There are no codes that come up when I plug into the computer and as I mentioned I have had multiple tuners look at the computer to verify everything looks good.
If you have any suggestions at all or if you have experienced a similar problem with the car dying immediately after firing up let me know.
The car has been sitting for months now with the same problem. Every time I turn the key it starts up right away and then immediately dies. It won't stay running for longer than 2 seconds UNLESS I spray starting fluid into the intake. So it seems that once the car starts, there is something that causes the fuel or the injectors to stop working.
Here is what I have checked so far:
1. Wire Loom was successfully tested on another motor and started another car using it. So the wire loom is not the problem
2. The computer was plugged into a different 2018 LT1 motor and that car started up just fine with no issues. So the computer is not the problem.
3. The fuel pressure has been checked with a gauge on the line and we have it regulated to 60psi which is what's recommended. If I crack open the fuel line right before it goes into the block it will leak fuel which shows it is getting fuel.
4. Pulled the plugs and we are getting a good spark with all new spark plugs.
At this point, I am assuming it has to be a sensor, which is unfortunate considering there are dozens of them. My thoughts are it could be a fuel pressure sensor or cam position sensor but I really am not sure. There are no codes that come up when I plug into the computer and as I mentioned I have had multiple tuners look at the computer to verify everything looks good.
If you have any suggestions at all or if you have experienced a similar problem with the car dying immediately after firing up let me know.
Last edited by Colew500; 06-24-2021 at 12:21 AM.
The following 2 users liked this post by Colew500:
69Project (09-03-2021), transam5.7lt1 (05-21-2024)
