First start
Thread Starter
Staging Lane
Joined: Jul 2008
Posts: 72
Likes: 1
First start What is the safest way to apply power to the system for the first time? I have a 2007 Classic 5.3/4L60E I modified the original harness, had Brenden at LT Swap.com rework the PCM.
I am merging the modified harness with Painless wiring harness. I am replacing every wire n my 1948 Chevy pickup.
I am merging the modified harness with Painless wiring harness. I am replacing every wire n my 1948 Chevy pickup.
Smoke test it...Key on, engine off. Scan tool readings are?
All gauges working? O2 sensors active?
Fuel pump prime? Pressure is?
Throttle work?
If the engine has been sitting, I'd pull the fuel pump fuse and spin it over til I saw oil pressure.
Check for oil/fuel/water leaks..OK? Reinstall the fuel pump fuse and start it.
Fire extinguisher at the ready, other observers watching for problems.
Water ready to add to the rad.
All gauges working? O2 sensors active?
Fuel pump prime? Pressure is?
Throttle work?
If the engine has been sitting, I'd pull the fuel pump fuse and spin it over til I saw oil pressure.
Check for oil/fuel/water leaks..OK? Reinstall the fuel pump fuse and start it.
Fire extinguisher at the ready, other observers watching for problems.
Water ready to add to the rad.
TECH Resident
Joined: Feb 2014
Posts: 954
Likes: 9
From: Encinitas CA
1. Use a fusebox, so weakest link is your fuse, not your wire.
2. I worked hard to make sure my computer had good ground(s). In addition to cleaning contacts and welding various grounding studs to the chassis for different accessories, I ran a large 10 gauge ground from the battery to the ground feeding the computer, tying in at a welded in ground stud. I also had the ground for the gauges and various relays tie to that stud.
3. Test various pins before plugging the computer in. Wiring diagrams tell you which pins should have 12V+, switched 12V, ground, etc.
4. TEST - I've tried as best and as many subsystems as I'm able to first.
5. Before firing, crank to check gauges work, including that you get oil pressure. I cranked my engine to build pressure without the computer plugged in.
6. Also, test your fuel system for pressure and leaks.
7. run some test on your cooling fan.
8. hook up your exhaust so you have the chance to hear something not working properly, if possible.
9. make a list for yourself so you don't forget something.
hope that helps.
Doug
2. I worked hard to make sure my computer had good ground(s). In addition to cleaning contacts and welding various grounding studs to the chassis for different accessories, I ran a large 10 gauge ground from the battery to the ground feeding the computer, tying in at a welded in ground stud. I also had the ground for the gauges and various relays tie to that stud.
3. Test various pins before plugging the computer in. Wiring diagrams tell you which pins should have 12V+, switched 12V, ground, etc.
4. TEST - I've tried as best and as many subsystems as I'm able to first.
5. Before firing, crank to check gauges work, including that you get oil pressure. I cranked my engine to build pressure without the computer plugged in.
6. Also, test your fuel system for pressure and leaks.
7. run some test on your cooling fan.
8. hook up your exhaust so you have the chance to hear something not working properly, if possible.
9. make a list for yourself so you don't forget something.
hope that helps.
Doug
Nope!! 
