1972 Nova LS swap
Thread Starter
Staging Lane
Joined: Jun 2017
Posts: 56
Likes: 5
1972 Nova LS swap Hi guys:
I have transplanted a 2004 5.3 Vortec in to my 72 4 door nova. I have done the wiring modification based on LT1.com instruction and Branden has reprogram the ECU as well. This is the second time I have done this. The first one is in my 79 Camaro. Anyways, before I put everything back together , I wanted to crank the engine and be sure it is firing and running well. I am having a hard time getting the engine started. It cranks but doesn't start. I have 52 lb of fuel pressure at the rail, so the fuel is not my problem. I tried to connect the OBDII in hope of getting some information but my scanner lights come on but there is no message on the screen. I guess my next step is checking the coil and injectors for the power but I though somebody may have some other ideas. I have flushed the injectors when I had the whole fuel rails taken apart so I know the injectors function but how do you check the power to injectors?
Thanks
I have transplanted a 2004 5.3 Vortec in to my 72 4 door nova. I have done the wiring modification based on LT1.com instruction and Branden has reprogram the ECU as well. This is the second time I have done this. The first one is in my 79 Camaro. Anyways, before I put everything back together , I wanted to crank the engine and be sure it is firing and running well. I am having a hard time getting the engine started. It cranks but doesn't start. I have 52 lb of fuel pressure at the rail, so the fuel is not my problem. I tried to connect the OBDII in hope of getting some information but my scanner lights come on but there is no message on the screen. I guess my next step is checking the coil and injectors for the power but I though somebody may have some other ideas. I have flushed the injectors when I had the whole fuel rails taken apart so I know the injectors function but how do you check the power to injectors?
Thanks
Thread Starter
Staging Lane
Joined: Jun 2017
Posts: 56
Likes: 5
I will try to check them again but I did flush and cleaned the injectors individually using a 9v battery when I had the fuel system apart.
Check your grounds, make sure they're tight and there is no paint under them hindering the grounding. Also double check the one down low behind the power steering pump, it's easy to miss and will cause a no start problem.
Thread Starter
Staging Lane
Joined: Jun 2017
Posts: 56
Likes: 5
Problem solved. The engine is purring nicely. Now, I can put the rest back together.
The problem was a stupid mistake that I did. By mistake, I used an accessory power feed to the power the stand alone harness. It had power on the accessory position but it would cut off the power when the ignition was "on" position.
Thanks for all the help.
The problem was a stupid mistake that I did. By mistake, I used an accessory power feed to the power the stand alone harness. It had power on the accessory position but it would cut off the power when the ignition was "on" position.
Thanks for all the help.
