1990 Cadillac Deville Starting Problems

1990 CADILLAC DEVILLE
178,000 MILES • 4.5L • V8 • FWD • AUTOMATIC
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JOEMILLER1954
  • MEMBER
  • 1 POST
The car will crank but sometimes will not start. I have replaced the coil, cap, rotor button wires and plugs. There is 40 psi on the fuel rails. I don't think it is the pass lock because it will crank. Could it be the ignition switch or the ecm? I am at wits end.
Apr 4, 2015 at 6:40 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
What you need to do is check if the engine is getting spark and fuel when it won't start. If both are present, either check to see if there is a signal to the injectors or see if it will start for a couple seconds using starting fluid.

Let me know what you find. Also, the security system will still allow the starter to engage but will shut spark and fuel off to the engine so it won't run. If your security light is staying on or flashing, turn the key to the run position (engine off) and wait around 10 minutes until the light turns off. It should then start.
Apr 4, 2015 at 7:01 AM
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