Ok I need a solution as what can it be that is wrong. Gsr motor, obd1 p28 with crome, turbo. precision 1000cc injectors, half tuned and was running
Problem: at first I didn’t have a resistor box hooked up. I an injector got stuck open flooding gas in. I guess the p28 was fried because of it I was told, so I bought another one with the same chip, wired resistor box and then it started right up alittle lean but it ran and not flooding

I drove about 10 miles and came home. i shut it off. And when I tried to start it again....that same injector flooded the cylinder again...
The resistor box is wired correctly, it had a new p28. Obviously the clips and wires were on correctly.. I was in boost driving for awhile then this happened..could it be the injector that is bad? Can they do that? Work and then not. Did I damage the injectors by not having the resistor box hooked up? do I just need new injectors? Is that 1st p28 still good?

 

bump

 

because one injector is independent of all others, it is quite possible for one to fail and the others not. Have you tried to switch them around to see if it's the resistor wiring or resistor itself?

 

good call redline.
swap some stuff around, shouldn't be too hard to figure out.
are the harness' at the injectors original, or were they changed?
maybe you have a bad connection there...

 

can a fuse be out? is there a fuse for injectors? the motor is out of thecar so i cant try that stuff yet

 

No fuse IIRC. Powered by main relay. Path goes (pos to neg) main relay -> injector resistor box -> injectors -> ECU. Injectors should measure 12V at one pin of the injector harness at all times the key is on. ECU flips to ground to fire the injector.

Could be a wire from the injector to the ECU shorting to ground... possibly.

 

that's exactly what it sounds like to me they use a ground trigger to open the injector. so if the wire is touching metal it will just open the injector and pour gas in. check all your wiring.