3rd gen Prius Check engine light saying piston 3 misfire Whenever it is cold, it will jerk the engine bay with the misfire, it sporadically comes on and off has been driven with this issue for 20k miles Will eat about a quart of oil per month you open the injector to clean it, and you see oil in that chamber Is this 100% a blown head gasket? Suspicion: head gasket is blown and oil is leaking into that chamber 242k mile, has overheated once and completely shut off due to failed water pump at about 170k miles the part you are fixing to order: Part number: 11115-37062 This part number only include the head gasket There is another kit for about $200 that has many extras, Should you get just head gasket for $58 or get the whole kit for $200? The job is scheduled for the next 1-3 weeks depending on timing since you are using the car daily go now look for the part number for that kit and see which way your fixing to go OEM Toyota 2010 - 2015 Prius Cylinder Head Gasket Set 04112-37254 Genuine NEW | eBay kit from Japan 210 dollar part number: 04112-37254 get just the gasket or the whole kit? The only part of the install you are concerned while watching YouTube clip: you have to take off the camshaft/timing chain/tensioner to do this task You saw how they mark their timing at 2 o clock, but you'll be documenting it for this thread once you do the task in couple week Goal: get all the detail figure out, then do the surgery in one shot so the car is not down for too long update: it could not be the head gasket Read some of this forum and mendel signature, also watched this video: in this video, they talk about symptoms exactly I am having They talk about EGR valve and PCV port problems, they get clogged and oil somehow get into the intake I still do not understand the point of EGR valve and th PCV valve, read up on them and comprehend them the issues that indicate it is not head gasket: When you go full throttle, no shaking/misfire, but when you drive flow of traffic, there is shaking In the video, he discuss this being a symptom of bad egr/pcv valves Why does it have the EGR valve? In the video, he puts a spatula blocking the whole system, and the car works fine New plan: first clean the EGR valve and the pcv valves, then see if that help Can we go without these systems? What is the point of them? Try to research these two questions in the meantime while data is coming in update: now you understand why our engine is eating its oil, unbelievable in this clip, you get your exact answer as to how the prius engine can eat its own oil if EGR valve clogged if throttle is at 0, and your egr valve is clogged, now the engine is starving for air the vacuum will pull oil from the PCV valve from the bottom of engine into the intake manifold wow yes, now that new data come in, adjust your plan: Clean you out that EGR system and that should solve your engine eating its oil
The head gasket replacement may not take care of your intermittent misfire, if it's due to oil fouling your spark plugs. There's three ways oil gets into your combustion chamber: gummed up low tension piston rings, valve guide seal leaks, and scored piston walls. You need to figure that out first! You'll probably also will need to replace your CAT in the near future, due to the high oil consumption. IMHO, you should buy the head gasket rebuild kit, that should have new valve guide seals and other gaskets you'll need to do the job properly. The really good ones has new stretch bolts replacement. Hope this helps.....
you've had enough of the misfire/shaking fix it already, today is the day you point: this is the valve that get clogged and suffocate your japanese engine open everything up, let your engine breath so you can glide across your realm take you out whatever in your way up close of inside egr valve, filled with carbon ton of accumulation on your egr pipe maybe dissassemble the whole valve, go tinker with it i show you what you fixing to do this plastic manifold is filled with sut/carbon since, your engine has been breathing exhaust gas for a quarter million mile, and tons and tons of idling where only exhaust is going into your engine keep dissassembling, take you out more harnesses, take you out your intake manifold look inside your intake manifold, filled with gunk trying to take out the plastic manifold, started taking off lines, one of them filled with coolant, splash coolant into your eyes suspicion: there is a coolant line going to the intake manifold that maybe cool down the exhaust coming back into your engine plan: get you some files and part cleaner, go you into your engine cleaning out the gunk breaking it down with part cleaner, hit everything with compress air plastic manifold complex: leave it as it is, clean it using the same protocol outlined clean you out your intake with: use paint brush to apply generous part cleaner, go in there with your file, hit the entire area with compress air tried to put it back together, put back the harnesses to see if she would run, no, "check hybrid system", tinker with it more tomorrow you ponder: if all the harnesses are connected, and the pipe that puts exhaust back into your intake is not connected, does the car know not to run? pretty sure you had all the harnesses connected but the computer would not let the engine turn on This setup is fundamentally flawed, you wonder if the old Prius has a simpler setup do not touch this engine bay without gloves, it seem like they make so much sharp plastic all over the place just to intentionally not let you fix it This job so far is making you not like this generation prius, and want to look into older prius to see their design
Sounds like runaway oil consumption as well. Consider replacing piston/rings, or safer with those miles and history: new short block. my 2 cents: time for another car.
Make sure all harness proper, see if you can run car without egr pipe make sure all harness plug in fully, try to run the engine without egr pipe, if it dont run, clean out your egr pipe and maybe take off the whole egr housing and clean that then put it all back together and see if engine will run how does it know if the egr pipe is install or not? show you what you did: put your egr pipe into a pool of part cleaner, then run you a metal pipe cleaner and rid you of all the carbon, hit with compress air your egr pipe is ready to go another quarter million then your egr housing was FILL with carbon, get you pipe cleaner, douse the area with paint brush part cleaner, hit you that area hard with compress air non stop put back your new egr pipe, the bolts to get this in are so tight, your hand would be pulverize if you dont have on glove with it half put back together but all harness plug in, your japanese engine roar to life with ZERO shake, purring just like it come out the japanese factory wow then engine shut off because all these random code woah: your japanese robotic hybrid is way smarter than you think, it know when its egr pipe is install even if all the harness plug in unbelieveable, go now rig everything back up proper, erase the code somehow with your chinese gadget, then see if you can get it to drive and not have engine fault while you go back and reassemble your japanese robot complex, ask you please someone show us how to get around the egr pipe for experimental purpose, how can we tell the computer not to care about the egr and just run the engine? update: it will turn the engine on, the engine purr properly, then it shut engine off after 20 second the possible culprit code: U0100, lost connection with ecm pcm A look you through that internet, figure out what their talking about woah, those flimsy sharp harness, if one of them get loose, you could be stranded who knows where having to deal with this, and it makes servicing the car harder, leading to the thought, there has to be a way to simply rig your overcomplicated japanese robot, to override its ability to shut down your properly functioning engine, go now search about that code on the internet, hopefully someone spill the sauce on how to overide the system to use the car woah, check out what you come across on that internet he put a paper clip in the 4th top, and 5th bottom of your OBD port, then he go into the fuse box and take out your big white wire, then he hit the brake 10 time, and all the code are gone is this a troll or for real? woah, look you through the comment on that video, everyone of them is: "I was stranded on the hwy and you saved me, bless you and your family" from every angle of the world, this little trick saving tons of people articulate what he does: There are different thing he is doing, the paperclip and the removal of white wire in the fusebox paperclip: that might have something to do with resetting ABS fault white wire removal: you are resetting your hybrid system to check all its pathway are proper hopefully, the white wire trick should work to get your prius at least able to be used notice you last time you try to run your engine: after it shut off from the warning, you walk back to your hood, and you hear clicking of relay in your fuse box following a certain pattern, almost like a song please y'all comment on what is happening: where does that white wire go and why does it work for all those people? What exactly is happening when you put a paperclip in those 2 obd port? you do need to use the car so hopefully you get it work out also for the help of million of people to keep their Prius running, discuss we the way of how these system work, and experiment I and show picture until fix
You need a work bench lol. Just a 2’x4’ sheet of 3/4” plywood with utilitarian, metal folding legs will do.
experiment with your prius, ask nature to give you a break soon we go experiment with reset prius hybrid system, experiment with the prius hoping to get it to run again although you have decide already that you will not let it go, and get to the bottom of the issue, still you say to nature: nature I am tired of solving problem, somehow please give me a break and in exchange, I share with the people the sauce on how to get around the prius safety feature so they don't need a tow/get their gold/cash taken from them for no reason and to show the people that yes, their prius is amazing, the Japanese engine, but it was the lawyers/insurance/corporation that put pressure on Toyota to make a faulty product your theory: the engineer that make your prius is secretly on your team, to get around all the faulty setup, that they gave you a way to get around all the problem stopping your prius from gliding you across your realm go you now: make that narrative true, prove to everyone that yes, the Japanese engineer is on your team, to keep your prius on your road solved, your japanese engine purr back to life like nothing happen what an idiot: you did not fasten the grounds on top part of your engine, What gave it away: "Lost connection" code lead to you figuring it out yes, still you experiment with running your japanese engine without egr pipe etc go you now glide across your realm with your japanese hybrid robot turns out your just an idiot and the japanese engineer is on your team
sorry i am a real person diagnosing their prius, the writing stye is to hopefully invite solution apology if it is confusing, but I intend to not break any forum rule and spread solution to other update: glide across your realm in a bit of limp mode does not have full power, check engine light throwing code only about air flow sensor, was disconnected, but the code for the misfire gone unbelieveable continue experiment: take off egr pipe, but leave all harnesses connected, including the air flow harness what happen if you take out egr pipe, and plug all harness properly, can we get all check engine light gone? now you go test @Mendel Leisk mile 245k Tried running prius without egr pipe, will run for 20 second, then shut down the code it throw: P3190 go look you up that internet and see what they say put egr pipe back in, plug in all harness, zero check light, wow your japanese hybrid robot know when you take out the egr pipe and will not run your engine in this picture, you try another experiment, shove you some paper into egr pipe to see if you can trick computer, no, computer does not get trick and know not to run engine now it is running fine with a tiny bit of shake plan: go you through the rest of the egr valve, you already clean the closer half, take you out the entire egr assembly, hit that with all the cleaner, let it sit in part cleaner, etc take you out the rest of the egr assembly, try not to take out too many other harness/etc get you in there and clean it, and rid your japanese engine from the small rattle car been running 1 hour cycling, no check engine, no misfire go you now and finish the job go you back in your egr situation found more carbon inside the plastic intake manifold, get you a massive pipe cleaner, go as deep as possible, dose it all in paint brush part cleaner, hit entire area with air, do this multiple time tried to reach bolts to remove rest of egr body, couldnt, might have to take out your windshield wiper go watch you a video see how they take out the egr body in this clip, you see what it take to take out your egr assembly: remove your windshield wiper, get you the right torx tool to remove the big stud holding egr body to engine block, use 12 mm on swivel to take out rest of bolt, ton of work to clean your egr assembly somewhat defeated since you cannot finish job due to time/tool, put your engine bay back together you need a 2 day span of time to take out all the everything to take out egr assembly but at least your check engine light gone, japanese engine purring, gliding you across your realm
search you for hour and hour for the solution, and it was on your forum, unbelievable wow, in the quote, you get your receipt that yes, the Japanese engineer is on your side, that all you have to do is just unplug the egr harness and your car will run better articulated perfectly and exactly how you imagine it, @Paladain55 spill the sauce for everyone Can you imagine how many Prius are out there with the death shake, and they are giving their gold away trying to fix it, and all you had to do was disconnect the harness? All that cleaning, cutting your hand in the plastic nightmare engine, all for nothing, unbelievable soon, go you try to unplug your harness on your egr, and see if the trick work remember: if you reset the system, the car will do that thing where it runs for 20 second and shut down you have to plug egr in, let it run, then unplug if you reset 12v system if this work, you could possibly take out the egr pipe, and disconnect the harness, and it should run amazing also when looking around for solution, it seem like EVERYONE has the same exact problem, all you hear is the death rattle and egr talk How many prius have this problem before we say, "putting exhaust back into your engine is the dumbest idea you ever come across" 5 million prius? 10 million? I bet you right now there are 20 million prius in America with death rattle from clogged egr In that thread referenced, there is someone in Brazil that declare that prius in other country does NOT have egr and will go 500k miles with same head gasket etc unplug the harness that go into your egr, make that check engine light come on go run you around doing errand, see if it improve it has full power when you want to go, but during idle still some shaking, with one episode of big shaking next experiment: try now to take out your egr pipe with the egr harness not connected report back with what happen take you out your egr pipe and unplug egr harness no, tried to take out egr pipe and the harness, computer will not allow it computer so picky, even if you try to run it without airbox, it knows and wont run the engine sad sad, pour you some oil thinking it wasnt that low, no you poured half a gallon to get it to full, rip your gen 3 prius, and many others will all start to break down at this time You were hoping @Mendel Leisk was not correct, but yes he is completely about the head gasket you are FUMING as you work on your plastic engine bay with sharp stuff everywhere, thinking about how much you paid in gold for this machine that you thought was made proper, nope, just like the forum said, by the time you figure out how it work, your head gasket will be rip they successfully did it, the lawyer broke the toyota reliability calm down try to come up with plan: 1. you have to figure out how to run the engine successfully without exhaust going back into it i bet someone know the sauce on how to put a resistor on some wire to make it think everything is fine with egr 2. spend you probably 3 days dissassembing and assembling top of your japanese engine covered in sharp plastic everywhere take off windshield wipe situation/literally everything/all harness/the timing situation with tensionor/chain/complete nightmare it is not worth fixing unless you get make sure you can figure out #1, the exact question, "How do we trick computer into letting it run without egr pipe so it can pull in regular air?" you are SAD now about what this mean for your gold/estate, you are a bit nervous that you will be stranded somewhere if it keep eating this much oil please someone link the sauce on how to trick computer to let engine run without egr pipe calm you down a bit, adjust your narrative: "the japan robot took you around the world almost ten time, saved you thousand and thousand of gold in fuel cost, you have slept in, camped in it, etc, cant you appreciate that it took you that far? who care if your japan robot down for 3-4 day for heart surgery? if you do it yourself, and everything work out, it can cost you $200-300 total, humble yourself, save your estate, do the title of thread" wow
You have a failed engine which needs replacing. Bad rings and a bad head gasket are the root cause. The engine won't start with a small vacuum leak much less a big one from the egr. A rebuilt engine that is swapped in will eliminate oil consumption, fix the hg problem and will give your experienced mechanic easy access to cleaning things. Swapping engines can be easier than a hg job since no camshaft removal or timing chain installation is required.
