HELP Need help with wiring on an ls swap

[tirestr]

Have a 68 Camaro with ls swap and trying to figure out some wiring. The PPL TCC Brake Switch is ran to a relay and then to brake switch, and also the pink ignition wire is also run to a relay. Any idea why they are on relays. Car won't crank, had the brake switch off and now I put it back on and still no luck.

[rickpaw]

You still should have the original wires for the starter. The car still should crank, but may not start.

What are you using for the engine harness? On my PSI conversion harness, the ignition wire is powered by a relay, which in turn powers the fuse block for ECU/sensors.

[tirestr]

My bad, the car will turn over but wont start. The ECM is triggering the fuel pump and the butterfly will open when you press the gas, but no fire. would the TCC Brake Switch cause it not start.

[armourmark]

Make sure you are getting power to the computer when cranking. PSI instructions say this is one of the most common issues for non start. When I got mine started, it ran for 10 seconds and then shut off. It turned out I needed to disconnect the MAF sensor because I just had it laying on the manifold and the air turbulence was throwing a code.

[rickpaw]

would the TCC Brake Switch cause it not start.

TCC switch only unlocks the torque converter when you hit the brakes.


Make sure you are getting power to the computer when cranking. PSI instructions say this is one of the most common issues for non start.

^^^ this. I used the old coil power wire for the ignition power wire. Also, check your fuel pressure. Also, it worth the $$$ to get some sort of code reader so you can check the ECU for code. You can get OBDII adapters on ebay for $20, and use free Torque App if you have an Android phone.