Question about 1985 Cadillac Eldorado

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Getting fuel to throttle body, but, car will not start. Fuel injected system. Injecters are not firing. Starts when gas is poured in throttle body then dies. What's my problem?

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Sometimes there is a fuse just for the injectors if none of the injectors are firing id check the fuse.
But first check to see if the fuel injectors click because if they do click it could be the fuel pump.
Are you able to figure out what the fuel pressre is at when you prime the system? You can do this by checking the schrader valve on the fuel rail by plugging in a gauge and see if it has pressure when you turn the key.
if the injectors dont click and you have fuel pressure check the fuse for the fuel injector system (depending on model fuel injector system.) Cause you need to first make sure the fuel injectors arent firing cause it may be a pressure regulator problem or a fuel pump.
if you need further assistance or have a question about anything ive said please follow up with a comment and i will be glad to assist you further from there. Thanks and good luck.

Posted on Aug 26, 2010

  • Nathan Ayers
    Nathan Ayers Aug 26, 2010

    forgot to mention you can generally check them clicking by putting the key forward but not in start position and then press the gas pedal down. This should work on your model but im not sure.
    cause i believe you have a ht4100 system which is a TBI or throttle body injection. but generally both injectors dont go at the same time and you feel a loss in power when one is failed.

  • Dave May 03, 2013

    I have the same problem but my car (85 eldorado/HT4100/DFI - TB)started hesitating thhen stalled out and would not start. I have spark and compression so I checked the fuel pump because I could not hear it. It was filthy but worked with direct DC connection so I cleaned the junk out of the tank, replaced fuel Filter (in line) replaced bad fuel pump relay but I am stiull not getting the injectors to fire even though I have 10 PSI of fuel pressure at the shrader valve. the injectors are not even firing but when I hook a 10 volt batery directlt and fire the injectors it runs for a few seconds. I no I need to find the oil pressure switch and unhook it hile I jump the fuel pump relay to see if the oil switch is the problem. any ideas ewhat else I can try or where I can find the diagnostic flow chart??? Thank you all, Dave


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