This sounds familiar
Good day Whit,
I have had many fuel problems recently and two in the past: the first was a clogged fuel filter=no gas. the second was a bad inertia switch in my Ranger (I got lucky, a buddy told me about it, I changed it and fuel was back). Recently I have had a tank pump go out, forgotten to hook up the ground and now yesterday after explaining to a buddy how I severly dought that the inertia switch was my problem because I was able to check it good, I traced it to the switch and it was at fault.
Here is what I did and the symtoms my Bronco II had. Cleaned and rebuilt injectors, fuel pressure regulator checked good, new inline fuel filter, new inline hi pressure fuel pump, new canister filter, new in tank low pressure fuel pump. I had no fuel, I went through it for 8 days then happily took it to a reputible local fuel specialist; 45 minutes later he finds the ground wire hanging from the battery cable terminal jog that I performed 9 days prior.
I drove the Bronco for 3 days, a hundred miles and then it started and stopped, started and stopped almost started/stopped, then wouldn't start.
This time I felt very confident that I could troubleshoot the problem:
1. I ran a hot wire from the battery to the power wire for the low pressure fuel pump in the fuel tank, it spooled right up (that is what I wanted to happen). Now I had a couple of plans on how to fix this but since things were going my way, I
2. I ran a hot wire from the battery to the power wire for the inertia switch (i had previously tested both my Bronco's inertia switch and another know good switch, the both worked, so I didn't expect to learn anything with this test but I had decided to work my forward from the tank, so...) upon connecting the power it did not spool up the pump (AH HA). I plugged in my known good switch and walla, all systems are a go. I installed the other switch and rotated the key, started up like a champ, no hesitation, no problem since.
3. I drove immediatly to Ford Parts department to buy a new inertia switch since my tester was from my Ranger; now I have only been able to purchase these from Ford and in my area the are about $55, so I hope you are right and your inertia switch is good as I WAS WRONG and it cost me several days of thinking and 20 minutes of trouble shooting.
I had an intermittent bad inertia switch, it worked when it wanted.
Good luck, gaz