Just got done changing the HPOP and IPR on the 02, took quite a bit of cranking to get it to start the 1st time, but oil pressure is doing great now. But when I shut it off it is almost like a leakdown of the oil pressure/losing of prime or something because the longer it is off, the harder it is to start. If I shut it off and immediately start again it is fine, but wait 5-10 minutes and it takes a minute+ of cranking to get it to fire again??? Any ideas????