OK.
Steve is clearly asking for accurate fuel pressure readings.
Get that done before you start trying to diagnose unrelated issues. Focus on and follow the advice being given, you will get through this.
Do not rely on the gauge you are currently using. If you don't have a known good pressure gauge/setup, go to your local chain parts house, you should be able to borrow a fuel pressure gauge. You can grab a cheap FP testing kit from harbor Freight, it's not a bad investment.
If nothing else, you can check and see how accurate your rail mount gauge is.