Could an improper seal on my fuel suction assembly be causing these issues?

[dogsridewith]

bad shape in what way(s). Did they all look just the same? Still might be useful to read them again for some cylinder showing different. (When a headgasket leaks between cylinders, both of their plugs may show effects.)

(Lean code reading more suggests something affecting all cylinders though?)

[ThrowingChicken]

Originally Posted by dogsridewith

bad shape in what way(s). Did they all look just the same?

They all looked pretty close to the same to me, but they were discolored and ashy. I think I tossed them already or I'd take a photo, but pretty similar to the one on the left here except the white ash was further up the ground electrode. http://automotivebros.com/wp-content...ug-vs-good.jpg

Originally Posted by B.B._07

Like the Autozone printout for a P0171 lean code is suggesting verify you have good fuel pressure first.

I picked up a fuel pressure gauge and sure enough it was reading 25-30PSI at idle, so I replaced the fuel pump and took another reading and it came in at slightly above 45PSI. This seems to have resolved the hesitation I was feeling at higher speeds, however the car still does not have as much punch as it did just a few weeks ago. So far the check engine light hasn't come back on, so it not having the same pep seems to be the only issue now. The only thing I really had planned to do was replace the injector insulators but I'm not sure the ones I have on there are causing any problems.

Originally Posted by tmontague

You may have already done this but a P0171 lean code is often triggered by a vacuum leak. If you can read your fuel trims at idle and at 3k rpm it will help you diagnose this. Easy fix once you identify it

I feel like this is a stupid question, but how do you read RPMs on this thing? It doesn't have an RPM gauge on the dash, just the speedometer and mileage/fuel/clock.