I have one more issue that has been bothering me for years that hopefully someone can help me with. In 2011, I bought a pampered 1993 Chevrolet K2500 5.7 that came from a fire department near Detroit. It had spent its entire first 18 years indoors and now for the last five years has been subjected to slightly harsher Northern Ontario winters. My problem is, as soon as it drops below 32 degrees fahrenheit, it turns over great but is reluctant to fire. I have done a tuneup, plugs, wires, rotor, cap and air filter, but no significant improvement. I have installed a block heater, and if I plug it in, it starts perfect. But I know that I shouldn't have to plug it in at 28 deg fahrenheit. The one thing I have been suspicious of for a long time, is that my fuel pump takes 20 seconds to cycle to build up pressure when you first turn your key on. Is there someone out there with a similar vintage 5.7 that could confirm if this is a normal cycling time?