Hard to start on 1st try, 2nd try almost always works
I have a 97 SE 3800 normally aspirated with 162K on the vehicle. 73K on the engine. Replaced LIM and plenum gasket, plugs, orings on injectors and PCV valve about 3k ago. Everything fine until about a week ago. Car has always started on 1st try. Lately 1st try doesn't work. 2nd try almost always works and car runs fine. Any subsequent restarts in the next 30-60 minutes will start immediately on the 1st try.
Found a cracked vacuum elbow at the fuel pressure regulator so I replaced it. Didn't help. No sign of fuel in the elbow.
Don't know for sure how old the fuel filter is but seems like if this was the problem the restarts would be a problem also.
Any suggestions are very much appreciated.