New Fuel Injector Install, ~20% Less MPG. Leak???

Would it be safe to remove the air filter while the engine is running so I could see it better?

For background, I ignored the repair manual instructions. I realized I could pry the fuel rod a little bit out after I removed the 2 bolts on top of it, so I just blindly slid the injectors in there, but I couldn't see how well it sealed.

User Jrusch provided a great write up, and user Mendel Leisk supplied the repair manual, but I thought I found an easy shortcut.

 

I just changed the fuel injectors, when I pulled out the old ones, some leaked out. So it smells like gas anyway right now.

 

They were 55 dollars for a set of 4 on ebay.
https://www.ebay.com/itm/121312381714?hash=item1c3ec80b12:g:9N4AAOSw83NdAAds
In the picture the o-rings are black, the ones that were delivered are orange. Maybe that's suspect?

Is there a way to check data list and techstream to determine the issue? I don't see any leaks. I do smell some gas, but it's still been less than a day since I pulled out the old fuel injectors, which spilled out a cup full of gas in the engine.

 

They spelled warranty wrong too... something I now just noticed

 

The dealer oem parts are ~500 for a set. Is this why people clean fuel injectors instead of replacing them?

 

I'm unsure of how many miles were on the old injectors. I am also unsure they were an issue to begin with.
I had a horrible p0301 misfire while driving, I panicked, towed it to a local mechanic, he said he replaced the 1st coil pack which fixed it (He charged me $200). I then researched how stupid easy that was to fix and I am adamant on learning how to do my own car maintenance from now on.
Then p0301 came back ~5k miles later, so I wanted to fix everything just incase. I read that misfires are due to coils, or plugs, or injectors. So I just went ahead and did all 4 of each. In retrospect I should have tested the new coil + plugs before messing with the injectors.

Before the recent misfire I'd get 55 mpg per tank easy without A/C. Now just driving it around town a little its struggling to keep it at 45mpg driving the same area and same manner. I watch the energy monitor while driving often, I learned to accelerate as little as possible, take advantage of declines and brake very slow and gradual.

I read somewhere that disconnecting the 12v is an ideal safety measure while doing fuel injectors, so yes, that was disconnected. The throttle body hasn't been cleaned recently. I am curious what you're thoughts behind the 12v being related are.

 

Thanks for the advice. I have vodka laying around, it's great for at home dry cleaning odors, an old theatre trick. I have to research the MAF cleaning more.
I notice now the 12V unplugging may have messed up data readings. Should I drive her around a lot more to get better readings? I just got the techstream recently and don't know how to interpret what I am seeing. I'm going to need to take a 101 udemy course or something.

 

I put almost 100 miles on it now, averaging 53.7mpg, so all is good, hopefully.
If the shortcut I took installing the injectors ever does become an issue, I'll update the thread.

@jrusch write up was more thorough and should probably be followed all the way
2008 Prius fuel injector replacement DIY | PriusChat

What I did was
1) open gas cap
2) unplug 12v
3) remove (2) 10mm bolts to peel back the air filter
4) remove (2) 12mm bolts to peel back the fuel rail
5) shove the (4) fuel injectors in, the 4th on (on the right) is a snug fit, the rest were roomy. I couldn't see what I was doing, just had to feel it. About a cup of gas leaked between pulling the 4 injectors, gloves are recommended.

I would like to hear about anything that forum members think that I may have done wrong. Either way it feels good not going back to the stealership.