Engine rebuild or engine change? big dilemma....

[ex-x-fire]

Are you using a lot of oil? If not then fix the injector,coil, ect.

[Elwe2k]

Originally Posted by miiser

If you maintained you engine properly stick with it. First of all you know your engine. You know what it's been up with.

Well, I bought the car from a guy that bought it from a used car dealer, so It's hard to determine how well it was maintained over the years, nevertheless it was a good deal for it though. The car was not in a good shape because it didn't have the proper maintenance... heck! it didn't have oil at all when I picked it up! for now i'm trying to restore it for normal commute use. With minimum DIY mechanical work i've managed to recover it and so far it's doing well.

Originally Posted by ncp13

Did he swap ignition coil with another cylinder?

He only swapped injector #1 with #2. Coils are OK at the moment.

Originally Posted by dogsridewith

see if #1 plug is watery wet, and shine a flashlight down into #1 cylinder

How do I do that? my DIY mechanical knowledge is limited....

Originally Posted by bronsin

You can get a used engine from a wreck with certain knowledge of how many miles were on it for a pretty good price if you look around.

Dont know if that will fit your situation but theyre out there.

Replacing the engine with a used one definitely is my best bet as it seems. Thing is though, i'm new to H-town so I have to figure out where's a good wrecker or junkyard around here, and hopefully find a totalled yaris with a low-mileage engine. Will do my homework for sure...

Originally Posted by tmontague

I'd say your best bet it to get a new 1nz with low miles, will cost much less than a rebuild.

If you were changing the valve seals yourself then I'd say just do that, but seeing as a mechanic is doing it and the cost is fairly high, I'd just get a new engine

I tell you man, IF I knew i'll definitely give it a shot. Sure there's plenty of YT tutorials, online guides and lots of useful things to help you do it... but I don't want to mess around things more than they already are. Another vote for engine swap...

Originally Posted by why?

A 2zz or even a 1.8 from a normal Corolla is really fun.

Sounds interesting... But it sounds expensive too. Plus you have the fitment issue so i'm probably better off with a 1NZ

Originally Posted by SirDigby

wait, what? how would valve stems cause a misfire? if it was leaking I would think you would get a consumption of oil and the CEL would be a O2 sensor issue.
why did you replace camshaft?
I can't believe no one noticed you used Bosch plugs. I would guess that is the misfire issue before anything else. you need Denso or NGK. even german cars run NGK. I've always had issues with Bosch plugs.
$1400 is a lot of money. you could buy a complete engine with less than 20,000 miles on it for like $700

Searching in the web I came across with information that says bad valve stems and/or worn piston rings or guides are some the reasons for misfire codes. I'm sure engine is leaking somewhere, and since I haven't found any leaks in the parking spot maybe the leak is inside the cylinder head and in that particular cylinder (correct me if i'm wrong). Here's the link to it:

http://www.underhoodservice.com/comm...misfire-codes/

No code for O2 sensor is present, only P0300 and P0301 at the moment, so is not the O2 sensor.

I replaced the camshaft positioning sensor and the crankshaft positioning sensor because codes P0335 and P0340 were present. Replaced the bad sensors, erased codes after and that was the end of those issues.

So, Bosch spark plugs are bad? I bought them cuz I didn't found Denso or NGK ones right away and the car needed a spark plug change ASAP, so I went for those. Have to check them out again to see if there's a problem with them, but yeah.... NGK and Denso are far better.

Originally Posted by ex-x-fire

Are you using a lot of oil? If not then fix the injector,coil, ect.

I think I used a 1/4 of a quart to fill it up again. Last time I did a oil change I used a 4 qt of Pennzoil high-mileage 10-w30 motor oil with a Mobil 1 oil filter, it took almost the whole jug of 4qts and left some, so there's that. I think injectors are good, so are the coils, maybe they're all fine cuz I haven't noticed any sputtering from the engine though. What about 2ZZ injectors? if the actual ones are messed up maybe I can get these from a Celica around somewhere....