I have a 1998 Astro will a 4.3 vortec engine. On our coldest morning
-10 degrees, engine would not start. It has always had a problem starting. Have to floor the van to make it start. On this morning it would not start at all. This engine has 257,000 miles on it. I bought the truck knowing that it had a bad motor. I know replaced the motor with a 2001 Chevy 4.3 Vortec, it still will not start. After I thought I was out of time. I timed the engine. And now I am worse off then when I started. I can get very little fire. Any suggestions would be greatly appreciated.