Hello again guys,
It's been a while since I've needed yall's help due to my blazer doing so well. However now I'm having a little issue similar to the one I was having before. I have a 2000 Blazer Trailblazer edition with 222XXX on the clock, and she is starting to miss, hesitate, or stumble which ever term you want to use whenever you rev the engine fast and when ever you take off fast (flooring it) from a stopped position. If I take off like a paw paw the engine never stumbles, or if i rev the engine normal it will not stumble??? I put a brand new AC Delco fuel pump and fuel filter in last summer, new Delco cap, rotor, wires, and plugs about 2-3 years ago. The last time I had this issue of the engine stumbling it was do to my distributor cap going bad. I was wondering if it was possible that my Delco cap could already be going bad?

I have performed the fuel pressure tests this morning and the results are as followed:
Key on engine off: 60 PSI after 20 min pressure dropped to 58 PSI.
Engine running: pressure maintained at 56-57 PSI.
Turn engine off leak down test(FPR Test): Pressure maintained 60 PSI after a time lapse of 20 minutes.

I have no stored codes, no SES light on. The truck runs well at cruising speeds and taking off slowly just not when taking off under normal or fast conditions and it is slowly getting worse meaning when the problem started it wasn't hardly noticeable and now after about two weeks it is extremely noticeable and more common.

Just need some help in pointing me in the right direction for further diagnoses so thank you in advance.

 

Ok update guys. Apparently the problem was that there was build up on the rotor button and on the contact points underneath the distributor cap. I cleaned these up and put it back together and wallah it is fixed and not missing anymore. Just can't believe that the rotor and cap of only 2-3 years already has that much build up on it.