SOLVED: Need help with bogging and misfires, persistent P0171 & P0174 lean DTCs

[victell]

Originally Posted by Factory6speed

…the circular plug for the ignition wire harness wasn't totally plugged in. It was half way in…check electrical connectors.

Ok I checked the connector and wiggled the harness with the engine running, no change.

Originally Posted by Effduration

Can you please describe your DIY smoke tester and method?
… my indie has found vacuum leaks I was unable to find.

I used a version of the smoke machine below. Manually blew smoke into the intake boot just after the MAF. The DIY tester was leaking smoke from the cap and the test area was windy. What method did your indy use to find the vacuum leaks?

Originally Posted by 80stech

If the gauge is slow to respond going up it can be slower going down, or not go down at all under load so that needs to be dealt with to get an accurate picture of the fuel system. Does the gauge drop 5 or 10 PSI instantly as soon as the pump shuts down?… +1 one one the smoke tester, not the most reliable way to prove no vacuum leaks me thinks
++ fuel pressure test includes driving under load with the gauge taped to the windshield, again common thing for a DIY'er to be fooled by not doing properly.

Originally Posted by Bdc101

OP is your pressure gauge fluid-filled?

Originally Posted by andrewwynn

What I'm noticing is the pressure didn't go to 50 until started. Or should hit 50 at key on. If you key off then key on does it go to 50? In any event I'm getting some deja Vu. It'll take half an hour but no$ to pull the FPR and look at the o-rings. At the age of the car I'll need surprised it's not flattened like mine was

I’ve now removed the schrader valve from the fuel rail and adapter, and opened the tester’s purge valve until fuel filled the hose up to the gauge displacing the air making it fluid filled. Previous fuel pressure video was a taped-to-windshield drive but did not do that this time as I couldn’t get a leak-free tester setup and didn’t want to risk it. Response is much faster now, but overall the same. Video below.

Originally Posted by X5chemist

What's the fuel reading in grams/sec?
Are any intake runners showing signs of oil residue? Mine had a vac leak along the intake seam.

I do have oil residue inside my intake (pics below). How would an intake vac leak cause this? For fuel reading do you mean volume test or Foxwell fuel consumption live data?