Originally Posted by algot1901

If the CRANKSHAFT sensor is bad will the engine (3400cc) start? I know the CAMSHAFT sensor can be disconnected and the engine runs, I am going to replace the CRANKSHAFT sensor for the third time and this new one is going to be a GM unit and hopefully the money light will go away..
regarding the FUEL PRESSURE sensor can someone explain what it does and what actuates it? There is a vacuum line that goes to it.
My problem is the starting of the engine which is hit or miss, sometimes it will start on it's own and other times it needes a sniff of either and then it will run until the key is turned off. If I have no vacuum at the FPReg will fuel still flow to the injectors? When the engine goes into it's no start mode it does have spark and the injectors are working, I must remove the air cleaner and squirt a shot of either then turn the key and the engine is running until I shut it off. I at one time thiught it was the pass key but I have rulled that out Thanks for the help in advance.