my camaro has just recentley stoped running all together. while it was running i was told it had the wrong prom in it. the prom that is in it is for 15in tires and i have 16, i was told that it shouldn't be a problem. Now the car is dead. It will turn over but it just wont start. I replaced the electronic control moduele and i have replaced the ecm. My car is also a tpi and i have 50psi of gas going to the engine, and i have spark but its yellow. Isn't it supposed to be blue? I aslo put one of the testers in the fuel injectors adn it doesn't light up?? what should i do? Could it be the fuel pump, the prom, the pick up coil, what could it be...?

Welcome to the Club! You should check the power fuses for the fuel injectors, 2 each. Check the fusebox cover for location of fuse in panel.

If fuses are good, then next I'd check the power relays for both banks of injectors. Are the relays getting power, from ignition switch, and do they also have a good ground to complete the circuit.

If you have no fuel injector pulses, you will have no fuel. The power relays supply battery voltage to one of two wires on each injector plug. The other wire in the inj plug, goes back to a quad driver in the ECM. At key on, engine off, there should be battery voltage on both wires to ground. As the engine is cranked, the one wire from the ECM will be pulsing low to high. The time when the ECM pulse is low, the injector will open to dispense fuel.

The ECM will pulse or turn on the injectors only if it is getting a tach signal from the distributor. No tach, no inj pulse.

Be sure to check all circuits mentioned, starting with the easiest first.

all of my fuses are good, but i can't read the fuse pannel it's worn or rubbed away. where are the fuel injector power relay? i don't know if it is even with the fuel injector. I found out that you could take off fuel inj one by one and try to start the car and when it finely fires up you have found the shorted inj. But my car never started. I took off the HEI super coil and some other stuff when i put the Electronic ignition control moduel in and the wire to the tach was in. so i guess that it's ok or should i do somthing to it?? how do i know that the conection to the ecm from the tach is good?? there are alot of wires to my ecm and i know that a few of those wires the rubber around them is cut i hope none of the wires are splitting.