My 88' Blazer has been dying while driving lately, but it usually starts right back up, but I can't get it to start this time. The check engine light was also coming on and the engine would run really slugish, it was reading a code 42. I was told to replace the knock sensor, but it didn't help. It's not getting any fuel pressure. I took the fuel pump out and connected it to a 12 volt battery and it worked fine. I checked the voltage at the fuel pump and got 12 volts. I replaced the fuel pump, and it still won't start. What else should I look at? It starts with starter fluid, but thats it. I am stuck, any ideas would help. Thanks a whole bunch!!!!!