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I'm not getting any signal to the throttle body injector to operate. Fuses, fuel pump and pressure are good. There are no broken wires or connections and I have good grounds to negative on the battery and chassis. I'm suspecting the ECU but no troubleshooting codes have been set. Could another sensor cause the ECU to not send a signal to the injector? Any suggestions would be greatly appreciated.
I'm getting plenty of spark. The engine will run for a short time if a small amount of gas is poured in the throttle body. It does not have a cam sensor that I'm aware of. It's not an overhead cam engine.
Could the electronics in the distributor detect engine rotation?
I'm getting plenty of spark. The engine will run for a short time if a small amount of gas is poured in the throttle body. It does not have a cam sensor that I'm aware of. It's not an overhead cam engine.
Could the electronics in the distributor detect engine rotation?
I have 12 volts on my red injector wire. My blue wire back to the ECU has continuity so the only thing left is the ECU. I will order one tomorrow and see what happens. Thank you very much for the
helpful advice and the diagram.I have 12 volts on my red injector wire. My blue wire back to the ECU has continuity so the only thing left is the ECU. I will order one tomorrow and see what happens. Thank you very much for the
helpful advice and the diagram.
Chack and see if your security light is staying on if so then security is shutting down fire to injectors.
are you gettting spark? pcm needs to see a signal from cam sensor to fire injectors. also when you first cut key on you should see the injectors give an initial shot of fuel
you should have 12volts on red wire of injector plug this tees off of ecm1 fuse if you do not have power here then wire is broke somewhere. this same power source goes to egr solenoid so check it for voltage the ecm triggers a ground signal so if you have power and no ground then it is most likely a bad ecm here is a diagram sorry saw 2000 s10 up top
you should have 12volts on red wire of injector plug this tees off of ecm1 fuse if you do not have power here then wire is broke somewhere. this same power source goes to egr solenoid so check it for voltage the ecm triggers a ground signal so if you have power and no ground then it is most likely a bad ecm here is a diagram
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Sounds to me like you are not getting any fuel to the engine, if you do not have fuel pressure to the throttle body then I would check the pump, if you do have pressure to the throttle body then your injectors are not opening.
If you have a way, check the fuel pressure at the fuel pressure regulator. Sounds like there is no fuel pressure. The injectors are controlled by the computer. Check fuse block for bad injector fuses.
check the vacumn pipe that runs to the end of the injector rail ,their is a vacumn operated valve that if the pipe is perished it will never go as it will not allow petrol in
Fuses first. Then, disconnect the fuel line at the throttle body (unless there is a fuel pressure testing port) and see if there is fuel when you turn on the key. If not, fuel pump, probably in tank. (assuming there isn't one on the side of the engine..) If there IS fuel in the line, then the computer may not be engaging the injectors. Check for wiring issues on something that old. Maybe the main junction splice for power to the computer. (Not sure where on that one, sometimes it's in a dumb place, like near the battery and it gets corroded).
Does it run poor at full throttle or between quarter and half throttle? Does it hessitate? If it does the EGR valve may be worn out. I had an 87 transam with TPI and was having problems with it stumbling and hesitating when it was warmed up. If the car starts hard and you have these problems then the issue may be low fuel pressure. Hook a guage up to the fuel rail and make sure you are getting pressure. If you are only getting a few pounds of pressure it may be the fuel pump or fuel pressure regulator. Good luck and if you thought this information was helpful please rate it when you get a chance.
I'm getting plenty of spark. The engine will run for a short time if a small amount of gas is poured in the throttle body. It does not have a cam sensor that I'm aware of. It's not an overhead cam engine.
Could the electronics in the distributor detect engine rotation?
I have 12 volts on my red injector wire. My blue wire back to the ECU has continuity so the only thing left is the ECU. I will order one tomorrow and see what happens. Thank you very much for the
helpful advice and the diagram.
Will do, Thank you again! ECU is on order and should be in by Friday.
no injecter pulse new ecm weak fuel presure suspect oil pressure switch
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