Question about 2001 Mitsubishi Eclipse Spyder GS

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Car cranks but won't start

I went out to go to the store and my car won't start...It started yesterday...It cranks and ALMOST starts but no complete ignition. I checked the ignition coils and plug wires, they are fine, the fuel pump is working, and there is no clog in the line. The injectors check out ok with a volt meter...WTF!! It won't even start with starter fluid! The timing belt is in-tact and shows no signs of wear. Is it possible for the timing to be SO far off suddenly that it won't start at all or is it more likely to be the fuel pressure regulator?

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It could be the timing or the fuel pressure regulator.
These are main symptoms of fuel pressure regulator failure:
Fuel Pressure Regulator Failure Symptoms:

  • Engine runs rough
  • Engine stumbles or sputters
  • Engine runs very rich - black smoke from the exhaust
  • Engine will not start
  • Engine starts but stalls shortly after start up
  • Noisy fuel pump
  • Noticeable decrease in fuel mileage
If your car is showing any of the above symptoms, try testing for a fuel pressure regulator problem. Without question, one of the best checks for a faulty FPR is to check the fuel pressure at the rail. If you have access to a 0-100 psi fuel pressure gauge , check the fuel pressure at the rail using FUEL-01. Normally a faulty fuel pressure regulator will result in a very high fuel pressure. So, if your fuel pressure is well above the specs provided in FUEL-01, you probably have a bad FPR.

One of the most common failure modes for the FPR is to fail closed to the point that fuel rail pressure is extremely high. The high differential pressure across the injectors causes them to draw excessive current. The excessive current is seen by the injector drivers which subsequently shutdown. If you have a condition where the car will not start or starts and almost immediately dies, try disconnecting the wire for one injector. Attempt to start the engine. If it starts and continues to run, the fuel pressure regulator is likely bad. Bear in mind that running on only three cylinders, the car will run very rough. By disconnecting one injector, it reduces the current enough to keep the injector drivers from shutting down.

Posted on Mar 19, 2014

Testimonial: "Ok, I disconnected an injector plug and after several tries, it started for 1 second and then died immediately. Does that mean the FPR is bad? or is the timing suddenly off that badly/"


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