I have a 89 camaro. It has the 305 tbi motor. The past few days have been bad with this car. My altornator locked up and snapped my belt and caused my car to overheat. I replaced the altornator, belt, and thermostat. The car was running warm but ok. I took it for a drive to see if it overheated. The problem is when I made a turn the car backfired real bad and I thought I blew the headgasket because it was barely running. I looked over the motor and noticed only one injector is working. I switched the plugs around and the injector works fine. The injector that works is recieving 13.9 volts. The one that is not working is recieving .2 volts. I know the issue is somewhere between the ecm and the injector plug. Its not the ecm because that was replaced a few months ago. Does anyone have a good idea where to start with this problem or anything to check before I tear into the wiring harness to back track the wires? Does anyone know what pins on the harness to the ecm give power to the injector? It is the passenger side injector thats the problem. Any ideas are appreciated.

 

time to check the TBI fuses and the wiring to the
injectors-they are fed 12v whenever the ignition is on
and are activated by the transistors in the ECM providing
a path to ground.If one of the TBI fuses is blown,check
for chafed or pinched wiring.If the fuse is ok but no 12v
is avalible at the TBI plug,check for a loose or dirty fuse
or bad connection behind the fuse panel.A bad ecm is
possible even though it has been recently replaced.

 

i had this problem on a 4.3. i used a noid light to see if the injector was getting power. it was a bad ecm.

 

Thanks for the help guys. I was having a really bad day and was so mad I forgot all about the fuse. I havent seen any damaged wires and its been running good. My ses light has come on a few times though. I haven't had time to check the cause of that. It only comes on for a few minutes when I'm on the highway so I'm guessing its just a sensor. The light has never come on before though but I noticed my temp sensor is cracked so I'm hoping its just gettin a weak signal an causing the ses light.