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Old 02-11-2011, 10:50 AM   #21 (permalink)
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Originally Posted by Piwoslaw View Post
How about:
  1. Kill the lower pressure fuel pump and see what happens
  2. Hack the fuel pressure sensor to tell the ECU the pressure is too low/high
  3. Trick the ECU into thinking the engine speed is such that the fuel should be cut to the injectors
  4. Cut sygnal to one of the injectors and see if the ECU sends an emergency shut down (rebuild engine if not)

Any safer ideas? As I mentioned earlier, the engine doesn't react to unplugging neither the cam, nor the crankshaft (engine speed) sensors, though I didn't pull both at the same time, so maybe the ECU is able to get its info from only the one that is available? Or maybe instead of unplugging it, the sygnal lead should be grounded to mass? I'd like input from anyone who's tried, even those dumb hall sensors cost a fortune.
Do not kill your lift pump. Starving your injection pump, especially such a high pressure pump, will cause cavitation. I work in an industry that uses high pressure pumps and Iíve seen the damage of cavitation. It essentially pulls the metal right off the inside of the pump.

Older diesels used a valve to cut air in and emergency. No diesel will run without air. Have you considered an actuated swing-out, or butterfly valve before turbo?

Iím a newbie, so Iím a little naive. Whatís the purpose of cutting the engine like you are trying to do; to keep rolling at speed with the engine killed? Why not just turn the ignition off? It works for me.

1998 Dodge 2500 QC 4X4, Modified Frybrid, Propane Injection, Water/Methanol Injection, Ecomods, CNG and Ammonia on the way!
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