Change coils and injectors: now have INSANE mpg reading and codes

no oem parts will cause chaos

 

Seems like from the MPG that you’re running VERY lean. I have the exact opposite problem which may be just as bad I keep old parts for years even after the confirming the new parts work well…

 

P0172 takes input from post combustion O2 sensor if your plugs/coils aren’t combusting all the fuel properly then it sees a rich condition and tries to lean the mixture?

Anyways it’s beyond me I think @tankyoung means non-OEM causes issues…

 

It's funny how all these aftermarket parts can wreak havoc on the Prius to me it's hysterical The same engine 2ZZ in a Corolla You can throw all these cheap parts at it cheap coils cheap fuel injectors etc I call them cheap as in not a lot of money I don't know their manufacturing prowess and I truly don't care All of these parts work on my Corollas without issue getting 30 something miles to the gallon and all that just like the car always has I own these cars and have had some Corollas for 40 years that goes back to KE 1.1 engine Corollas of long time ago that weren't fuel injected etc. But yet you get these same similar parts for the 2ZZ Atkinson cycle engine in the Prius and all of a sudden these parts are no good cool sounds great cannot imagine I guess Toyota really learned how to tweak their TIS and computer systems to make it so that almost nothing can be used that's pretty cool actually It's another reason why I don't like all these newer cars they can turn your car off and you can't drive it and you're just sitting there looking stupid because of Big brother oh no that is not going to be going on in my world but here we are of course I have many many vehicles that don't fall into any of these categories purposely because I know how this is going. I've never had a car payment in my life and never will I don't want creditors calling me offering me deals bothering me worrying me with their nonsense and then turning my car off because Big brother said or somebody made a mistake down at the office human error boy if something like that happened I'm liable to go down there to that office and make it not be there anymore.

 

Well, from a Toyota dealership. See what it works out to for you here:

https://www.amayama.com/en/catalogs/toyota/prius/3-hatchback-right-xw30-2009-2830/engine-fuel-system-and-tools-1/fuel-injection-system-49

I’ve used them for several orders, so far no problems, and no extra charges besides shipping.

this is what I see, on west coast Canada, in CDN funds:

 

The best way is to send your old real toyota injectors to a rebuilder service.

Most of them do an exchange service, so you can buy a set of freshly rebuilt ones and then send yours in for a core refund.

Apart from getting good performance from parts that were actually flow-tested, they'll tell you what was wrong with the ones you sent in.

Amazon is littered with counterfeit spark plugs and ignition coils. Junk parts, get rid of them ASAP. eBay no better.

For a Prius, get good Denso plugs from a local store. Just too much risk of counterfeits.

At this point, your best bet would be pulling injectors out of a junkyard car and paying to get them rebuilt, then tell your wife to throw away the next box that shows up from Amazon.

 

I agree with the mentioned statements. For some reason, the Prius demands OEM parts when it comes to fuel injectors, spark plugs and coils. I think if you follow the advice of the aforementioned (used, refurbished or new) your nasty codes will disappear.

 

Also leadfoot is completely right about online purchases. Recently, I have purchased items that really were just "bricks". Meaning, they looked real on the outside and were complete fakes on the inside. Many electronic items are turning up to be this way. I ordered a wireless keyboard and it was a dud! Didn't even power up! Went to my local Bestbuy to get the same one and it fired up right away. Ordered a CPU for my desktop online, complete bomb! Bought it at my local Micro Center, worked like a charm. It seems that certain offshore manufacturing plants are selling items that they know won't work. Yes, I got my money back from amazon, but the tricksters get the initial money.

 

You unlocked the code to superior MPGs and now want to go back to 50 mpgs?! I give up!!!

 

It must be knocking and hesitating badly for him to pull four codes….

 

15 ft/lb I think, if I'm reading the attached right.

 

The plugs are the bigger concern, mostly because they are in a location that allows them to do real damage to the engine if they start coming apart.

I've gotten away with Amazon/Chinese junk coils in non-Prius cars, they work okay for a year or two (instead of ten) so I'd be least worried about them. I'd expect them to give the same year or two in a Prius.

 

I know Beck/Arnley has a good reputation, sans the one time their application guide gave me the wrong size glow plug for a Mercedes diesel….