Lets Fix That Prius

Back story

1.Car had the morning shakes (cleaned EGR circuit ran fine then next day same thing.)
2.Realized issue was blown head gasket, Car only went through one reservoir of coolant and drove for about 100 miles in this condition.
3.Replaced head gasket plugs coils and injectors.
4.reasembled car seemed to run fine but I notice sluggishness and loss of power.
5.checked compression, all are at 155 and piston height including timing all is correct.
6.took it to three mechanics none can figure it out, They all checked the above and moved components around
all confirm cylinder 4 is backfiring but not enough to throw a code???
7. I am out of ideas but since compression timing are good and ignition components have all been swapped my logic says its a mechanical issue with the top half of the head. Again compression is good, timing is good, coils plugs and injectors replaced and moved. So I think something with the upper part of the head is off.

So I will be starting from scratch and start with the basics so I ask who wants to join me on this journey?

I will be starting with a compression test then removing valve cover to confirm timing. AL suggestions are welcome. SO lets fix that Prius.

 

already did.

 

I did not send the head to a shop it looked flat and checked with a straight edge.
the car has no codes and good compression. I took the valve cover off in hopes a rocker arm fell off, sadly no.
I am now leaning towards a weak spring or bad/clogged poorly performing lifter.
This weekend I will be checking cylinder travel height, replace that injector again, checking compression and sticking a camera in the cylinder to check for damage.
if all is good then I will proceed with replacing cams, lifters springs, keepers, caps and valve rockers. If this fails to solve issue. I will replace the engine. I have taken it to three mechanics none could figure it out all the swapped components and did compression test. in case you are wondering.

 

All cylinders123 go to the mark on the right number 4 goes to the mark on the left at tdc
So I guess new motor time. So the 2zrfxe 2016 should work correct me if I'm wrong

 

I found another engine with 10k on it for 1450 out the door. But now my car wont start I put all the fluids in it but forgot the coils and plugs.
I got it off the roll up car stands it rolled about 2 feet cranked over and and then said low oil and plock
I unplugged the battery and let it sit for 20 minutes.it still has p lock error. any idea how to reset this? I checked the fuse for park 7.5 its still good evern replaced. it. I used my car jumper and another truck to make sure I have enough juice to start it. Any sugjestions??

 

the now start even with bent rod it runs here are the codes im getting

 

I also forgot to reconnect the engine grounds so I suspect I shorted something out.

 

is there a main fuse to the ECM or relay or i fried it? if so how much are they and can I DIY?

 

Ok I think I know what happened with he coils out and the engine grounds loose when I started the car the coil sparked and likely arced into the engine ground frying something. I cant connect with ODBII Im using techstream software and was able to get this infor here.
I hope its just a relay or fuse. anyone have any suggestion on what to tackle first here

 

I started the car on its own power no jump pack that Was later only due to low battery then a truck as I lost confidence in jump pack. Nothing was reversed. Is there a main relay? Really main issue is plock parking malfunction. I can't get it to go into park.