Replaced coils misfire disappeared for two days it's back

I agree with your mechanic it is best to use original Equipment parts. I have also had bad experience with aftermarket coil packs.
Do you know what the codes are? Is it just one cylinder that is misfiring?

 

Was the electrical connector contaminated with oil? Or was the spark plug hole contaminated with oil? Do you happen to know the code that is in the computer? You should have a check engine light on. I was hoping you can pull the code.

 

replace the valve cover gasket, clean the cop and try again

 

The o rings are leaking oil into spark plug channel. Very common . You're Denso probably just fine. I have aftermarkets just fine. Very simple part. Denso made in same place .

 

Yes if you’re getting oil into your spark plug tube make sure you change the valve cover gasket and rings. You will also need to change the spark plugs because of carbon tracking. One thing you could do instead of buying new coils is switched them with another cylinder. See if the problem follows coil pack from cylinder one.

 

Agree you should change valve cover gasket, that's why oil leaking into plugs. Your coils are probably not the problem. In the future, it's always a good idea to buy coils from an OEM maker like Denso or Delphi. Cheap aftermarket coils tend not to hold up well in the hot engine compartment, made with inferior parts to only last a very short time.

 

I like step number two. Usually when you have a connector problem on the coil it throws a different code. But it would not hurt to clean the connectors with electrical parts cleaner.

 

Oil only on the top from when you're filling oil? Then that oil would be just touching the sealed top where the plug connects I'm talking about further down that tube if you pull the coil pack up and out on the bottom of the extension that grabs the plug end the top of the plug is that oily That's what you don't want to be filling up with oil that well down there that spark plug tube That's the reason that denso coil has that plastic extension to reach the plug That's where you're worried about the oil being not spilling a little on top of the coil pack with the 10 mm bolt installed. And all that that wouldn't affect much of nothing you'd have to pour a whole lot of oil the way the plug fits and all the oils not going to run down into the plug or connector and it certainly can't get in and run down to the tip of the spark plug

 

Try doing a compression check. Also do a running compression check. Could also be a problem with the fuel injectors.

 

I'd be looking at no 2 imed..and each cylinder individually. My no 2 has 0 stumbles like crazy all of these things I would never think this was a coil pack in my car I knew it wasn't because the transition seemingly from gas to electric or vice versa the car would smooth out when the ice was not fired or not running or not doing something as soon as the ice was turned on the stumbling occurred I knew that it was internal I ran a compression check before I did almost anything else and that's how I knew the number two was down and then I got a code for the number two cylinder after it got worse but I knew that's what it was before the code and the history of these engines I knew that I would not be fixing the US EPA engine that I had and so now I have a JDM thing sitting here with its transmission and it looks brand new inside and out there's no browning under the valve cover like you see in the United States why I don't know or care

 

I couldn't call the car a money pit not mine mine's got 280,000 or so on it and my 2010 is right behind it in the 240 range if these cars fail that this kind of mileage I certainly can't say the car's a money pit it's gone almost 300,000 mi without anything except consumables tires 12 volts the normal things that wear out The rest of the car has been fine The solar roof the sunroof all of it is worked great The 2010s HV battery started giving me fits so I bought a 2013 or newer battery from a junkyard no less dropped it in the 2010 and have put 30, 000 uneventful miles on the car certainly not anything near a money pit

 

I came up with the name “2010moneypit?” Thinking I was going to be putting a bunch of money into this vehicle. So far so good. I only have done an oil catch can in the last 7000 miles that I have owned it.
When I purchased the vehicle it had a P 3190 on it. Also the hybrid battery was run all the way down. That’s why I thought I’d be putting a bunch of money into it. I only paid 1000 for the car.

 

Exactly and as such that car has cost you nothing and like the model it is one of the lowest costing cars to run on these roads I have five of them and they've cost less to run than my Corollas which are already one of the lowest running costs on the planet for a vehicle

 

Yes, I totally agree with you. I did some research before I bought the vehicle negative things such as head gaskets and problems with hybrid batteries. But the people that don’t have problems don’t complain therefore you don’t see that on the forums.
I was thinking about buying a Tesla in the next two years now I am really considering a Prius prime. Of course I want to wait until the market calms down.