A while back I told you what my car was doing, how I came to a complete stop, and the engine rpm go down to 400 likes it's about to stop running but doesn't, it's does it 2 to 3 times before it starts to idle normal. And will give it gas it makes a pinging sound like it's under a load, and I had all kinds of people to look at it and no one can tell me what's wrong with it, well I finally got an update. The car got worse,a lot worse, that the Toyota dealership even said they have too look further into the diagnosis. Cuz they we're as puzzle as I am, well they came back to me and told me some bad news. They looked inside the engine and told me that I have carbon built up in the engine and oil slug is why the car is acting the way it does. It is so bad that flushing out might make it worse
And the dealership recommend me getting a new engine, that is something that I don't care about doing. $7,000 for a new engine and that's not counting the cost to put it in, Well I was about to trade my car in when I realized, my car is almost paid for, and it might be best if I go get a second opinion, so that's what I did, the 2nd second mechanic shop confirmed to me what the dealership said is true, about the oil slug and carbon built up, but they recommend me to take the engine out, take it apart, clean it out, and put it back together, like a mild rebuild. Where went with the option cuz it's cheaper. They told me that the oil slug that built up in my car, was so bad they were surprised that the engine never locked up or blew up, so I called it in a good time.
Now here is something that I thought of, when I brought this car used. Had around 115,000 miles, on it. I dove it for 3 years now it's got 155,000 on it. Oil slug comes from not changing your old regularly, and I have never miss any oil change, I could change the oil myself, but the oil I must buy, is synthetic oil which is more expensive. If I change it, it would cost me $55. And that's not cost of driving the old oil somewhere to AutoZone to have it recycled.
The dealership charged me $65 to change my oil, well I'm doing saving $10. It's best that I'll take it to dealership and let them change my oil. And I never miss an oil change never and I can prove it. If the oil slug comes from, not changing oil regularly and Skip an oil changes, that tells me, that someone at the Toyota dealership has not been changing my oil. I bring my car in on the schedule appointment, they take my car to the back, while I wait an hour and a half, and I'm off until my next oil change. They still charge me for the oil change and I can prove I'd never missed any oil change. So I believe the Toyota dealership ain't ruined my engine, because maybe a mechanic there who's having a bad day decided not to change it more than once.
How can I show proof that the dealership is at fault for ruining my engine, believe me I can show proof I never miss an oil change, the Toyota dealerships is the only one who changed my oil, no one else.
The problem is that most of that sludge may have built up during the first 115K miles before you owned the car and started doing regular oil changes.
Clean the intake valves, and the throttle - on these 90% of the time it's that.
Disconnect the battery, connect it, raise the RPM to slightly 3,000 for over 30 secs. At a stop, in N, no AC and no load on the alternator.
(My Corolla, same generation, had a similar thing where it tried to constantly die after a battery replacement and that was the only thing that made it relearn the idle values correctly)
EDIT: thinking about it, replace the PCV. Poor oil maintenance can clog it and cause these kinds of symptoms.
carbon built up in the engine and oil slug is why the car is acting the way it does.
Doubt that that's the cause, engine's don't try to shut off only during idle because of sludge, unless it's actually terrible.
It is so bad
Doubt it, unless the valve train looks like this: (link to pic from the internet)
BUT then you'd get VVT codes, and you don't.
So I think the dealership is wrong.
And the dealership recommend me getting a new engine
get one used and warrantied for a few grand, if you're sure the dealership is correct about the bad engine.
Oil slug comes from not changing your old regularly, and I have never miss any oil change
Ask the previous owner how often he changed his oil, something tells me it's north of 10k miles.
So I believe the Toyota dealership ain't ruined my engine
Being more realistic I doubt that the dealership has anything to do with it - It's a 13-14 year old car with 20% more millage than the officially stated lifespan (about the average of what these engines live) that wasn't even serviced there for most of its life.
How can I show proof that the dealership is at fault for ruining my engine
By your description of things they're not.
Not sure you can. I learned the hard way that techs make mistakes. (One drained my coolant but did not put any back in, and I drove off.)
In the future, put a small scratch on the oil filter just before you go and check the level and color. Take a picture of the scratch and the oil color on a white paper towel.
After the servicing, before driving off, confirm the filter does not have your scratch as well as check the oil level and color.
I agree with above comments. How often did you change the oil? Also, if the previous owner changed it every 10k miles, it is likely your engine has issues at this miles.
I would pray the cams arnt ruined.
